Navegando por Assunto "Psicologia experimental"

Agora exibindo 1 - 20 de 47

Acesso aberto (Open Access)
Análise da competição entre os efeitos de consequências imediatas e efeitos de justificativas sobre o seguimento de regras
(Universidade Federal do Pará, 2016-03-18) FARIAS, Andréa Fonseca; ALBUQUERQUE, Luiz Carlos de; http://lattes.cnpq.br/5261537967195189
This study aimed to investigate the effects of rules with additional justifications of Type 1 (reports about possible consequences of rule governed behavior) and Type 2 (reports about eventual approval or not, of the rule following) on the maintenance of rule governed behavior, after a change in programmed contingencies when this behavior starts to produce loss of reinforcer (points exchangeable for cash). To this end, 44 participants were exposed to a matching to sample procedure. The task was to point to each of the three comparison stimuli in a given sequence. Each comparison stimulus had only one dimension - color (C), thickness (T) or shape (S) - in common with the sample and differed on all other dimensions. Experiment included six conditions. Each condition was composed of four phases. Phases 1 and 3 started with the presentation of a rule related to programmed contingencies, while Phases 2 and 4 were marked by an unsignaled change, in such contingencies. Phases 1 and 3 differed only as to the justifications presented to rule following. The maintenance of the rule governed behavior avoided loss of the programmed reinforcer in Phases 1 and 3, and produced such loss in Phases 2 and 4. Overall, results showed that rules with justifications can alter the probability of the behavior specified by them to occur in the future. The role of control by rules in the explanation of behavior was discussed.
Acesso aberto (Open Access)
Análise da escolha individual na distribuição livre ideal: comparando diferenças e razões
(Universidade Federal do Pará, 2016-01-13) SILVA, Thaís Tavares da; TONNEAU, François Jacques; http://lattes.cnpq.br/2917023797307669
Optimal foraging theory, as a way of understanding foraging behavior, provides a foundation for the Ideal free distribution theory, which seeks to explain the choices of subjects under the condition of group competition. However, although many experiments have been performed to assess the Ideal Free Distribution (IFD), deviations have been observed in relation to the predictions of the IFD, both in other species and in humans. Sokolowski et al. (1999) have proposed an explanation for such deviations in terms of equalizing differences (nG-WG)-(nRWR) instead of ratios (WG/nG-WR/nR). Here we proposed an experiment in which individuals conducted their choices with a software that simulated the choices of subjects in a group. The software was developed in order to clarify the role of respective equations (ratioor difference-based) or choices strategies, fitting the data with a sigmoidal function. The dependent variable was the choice of every subject while being presented with artificial situations. The results showed that subjects performed their choices under the control of the two strategies, as well as others. This study brings relevant contributions to the study of individual choices, in addition to providing data that deserve to be analysed in more detail by future research.
Acesso aberto (Open Access)
Análise do controle por regras
(2010) ALBUQUERQUE, Luiz Carlos de; PARACAMPO, Carla Cristina Paiva
In Behavior Analysis there is a proposal in which rules do not alter the probability of behavior future occurrence and another one in which rules can exercise this effect. The present study has the objective of presenting such proposals. Before this, the distinction between rule-controlled behavior and the contingency-controlled behavior are presented, besides some procedures used to investigate rule control and some theoretical propositions concerning how rules function. Afterwards, some reasons why rules are followed are presented, highlighting the effects of delayed consequences. In conclusion, arguments stating that rules can alter the probability of future behavior are presented.
Acesso aberto (Open Access)
Análise do papel de variáveis sociais e de conseqüências programadas no seguimento de instruções
(2004) ALBUQUERQUE, Niele Márcia Amaral de; PARACAMPO, Carla Cristina Paiva; ALBUQUERQUE, Luiz Carlos de
Twelve children in the eight-to-nine year age range were exposed to a matching-to-sample procedure in an investigation dealing with the role of monitoring in instruction-following. On this task, two comparison stimuli were touched in the presence of a contextual stimulus. Whereas incorrect responses resulted in reinforcement loss, correct responses avoided this consequence. There were five phases in the experiment: Phases 1, 3 and 5 began with an instruction corresponding to the contingencies; contingencies in effect in Phase 1 were reversed in Phase 2, reestablished in Phase 3, reversed again in Phase 4 and renewed in Phase 5. The participants were subjected to two conditions, differing with regard to the phase where an observer was introduced in the experimental situation. During Phases 2 and 4, 10 participants did not follow instructions. This finding indicates that even when monitoring is present, instruction-following does not occur if it is not reinforced.
Acesso aberto (Open Access)
Análise dos efeitos de histórias de variação comportamental sobre o seguimento de regras
(2004) SANTOS, José Guilherme Wady; PARACAMPO, Carla Cristina Paiva; ALBUQUERQUE, Luiz Carlos de
In a study concerning the sensitivity of instruction-following to signaled changes in contingencies, 14 children in the 8-to-9 age range were exposed to a matching-to-sample procedure. On this task, 1 of 2 comparison stimuli were touched in the presence of a contextual stimuli. There were 3 phases in the experiment. Those contingencies in effect in Phase 1 were reversed in Phase 2, and reestablished in Phase 3. The transition from one phase to another was cued by a signal. The participants were subjected to 2 conditions that differed in the number of instructions corresponding to the contingencies presented in Phase 1: Only 1 instruction was given in Condition UI, and 3 different instructions were given in Condition MI. One of the 6 participants in Condition UI and 4 of the 8 in Condition MI ceased following instructions. These results suggest that the presence of an interaction between history of behavioral variation produced by different instructions and signalling contingency shifts may render the instructed behavior susceptible to contingency shifts.
Acesso aberto (Open Access)
Aplicação de tentativas discretas por cuidadores para o ensino de habilidades verbais a crianças diagnosticadas com autismo
(Universidade Federal do Pará, 2015-08-25) SILVA, Álvaro Júnior Melo e; BARROS, Romariz da Silva; http://lattes.cnpq.br/7231331062174024
The cases of Autism Spectrum Disorder (ASD) are characterized by persistent deficits in communication and social interaction in multiple contexts. The diagnosis of ASD also involves the presence of repetitive behavior and restricted interests. Considering the need of intervention and the lack of qualified professionals to implement intervention the purpose of this study was to verify the effects of parent-implemented teaching programs (VI) on the performance of children (VD). Participants included three children diagnosed with autism and their respective caregivers. Through a multiple probe design, the independent variable (IV) was selectively implemented on each of the teaching programs. Caregivers carried out the intervention at home and had their performance, and the performance of their children, was evaluated in sessions conducted in the room of the APRENDE Project/UFPA. Their performance was monitored during every session. Two or more programs were selected for each child. Participant 1 reached criterion for performance accuracy in the following programs: "Tact of Actions", "Mand with Autoclitic", and "Intraverbal of Personal Informations" after 7, 13, 19 sessions, respectively. Participant 2 needed 24 to 48 sessions and the Participant 3, 5 to 38 sessions to achieve accuracy in the programs. Data show that the intervention via caregiver, guided by a behavior analyst, can be effective and appropriate to the social-economic context of Brazil, characterized by lack of governm.
Acesso aberto (Open Access)
Avaliação de simetria por comparação de treinos de emparelhamento ao modelo sucessivo (go/no-go)
(Universidade Federal do Pará, 2013-09-16) PICANÇO, Carlos Rafael Fernandes; BARROS, Romariz da Silva; http://lattes.cnpq.br/7231331062174024
Successive matching-to-sample (go/no-go) has been pointed out as an effective procedure to reduce stimulus control digressions in conditional relation training with non-humans. Other studies suggest the comparison between (symmetrical and non symetrical) conditional discrimination acquisition curves as a way to evaluate properties of equivalence relations. This study aimed to evaluate the potential of using both procedures above mentioned in evaluating the property of symmetry in four capuchin monkeys (Sapajus spp). Stimulus presentation, activation of devices, and response recording were automatically controlled by software. Subjects were maintained under conditions approved by IBAMA. By mean of an “ABAB” single subject design, the acquisition of symmetrical (A) and non-symmetrical (B) conditional discriminations were compared. In both Condition A and B, conditional relations A-B and B-A were simultaneously trained so that in every condition, four new arbitrary conditional discriminations (with new stimuli arbitrarily related) were presented. When symmetrical, positive combinations were A1-B1, A2 B2, B1-A1, and B2-A2, and negative combinations were A1 B2, A2 B1, B1 A2 and B2 A1. When non-symmetrical, positive combinations were A1 B1, A2 B2, B1 A2, and B2 A1, and negative combinations were A1 B2, A2 B1, B1 A1 e B2 A2. Two of the four subjects (Negão e Bongo) completed que acquisition of one (Bongo) or two (Negão) sets of conditional relations (Conditions A-symmetrical and B-non-symmetrical) for the evaluation of the viability of the procedure to verify the property of symmetry. Data demonstrate that the method here reported detected the presence of the property of symmetry in the conditional relations leraned by Negão and its absence in the conditional relations learned by Bongo. Data are inconclusive for the other two subjects. One detailed analysis of the performance of each subject and its measures is also presented.
Acesso aberto (Open Access)
Avaliação de um procedimento de aproximação sucessiva sobre a seleção de uma prática cultural complexa
(Universidade Federal do Pará, 2013-09-23) PAVANELLI, Sergio; TOURINHO, Emmanuel Zagury; http://lattes.cnpq.br/5960137946576592
The investigation of cultural selection has become more consistent theoretically and empirically in the Behavior Analysis especially after Sigrid S. Glenn proposed and developes the concept of metacontingencies. At the level reached by empirical investigations, a challenging issue relates to the complexity that cultural phenomena usually present. Cavalcanti (2012) evaluated the possibility of increasing the probability of complex interlocked behavioral contingencies (IBCs) by means of a successive approximation procedure (analogous to modeling operant response) involving a task of choosing rows of a matrix by group members. This study was conducted at the Laboratory of Social Behavior and Cultural Selection of this University (LACS / UFPA) and consisted of a replication with two microcultures, of Cavalcanti's first experiment with addition of the following changes in the procedure: a) introduction of generational change, b) steady order of choice by members of the lineages in the microculture and c) The use of two sets of criteria for the production of cultural consequence (one with each microculture). Study participants were undergraduate students from various courses, excluding psychology, distributed in two microcultures (A and B) consisting of 4 participants positioned in 4 different lines (L1, L2, L3 and L4). In each microculture 4 participants worked simultaneously sending individual responses (choice of lines in a 10x10 matrix) which produced individual consequences (exchangeable chips for money) every time the operant contingencies in place (choice of odd lines) were met. Regardless of operant contingencies was also the release of reinforcing cultural consequence in the form of figures stamped on a card which were exchanged for school items to make up a kit at the end of the experiment. The experimental session consisted of cycles of attempts (moves made by the microcultures) and generations of participants. Each generation corresponded equivalent to 20 cycles of trying. In each generation a new participant was inserted to replace the one with more time in the study. Substitutions made occurred within each specific strain. The general objective of the study was to evaluate the effects of the gradual increase in environmental complexity procedure (criteria required for the production of cultural consequences) on the "modeling" of cultural practices in the context of sucessive generations. For the two microcultures data suggest the efficacy of the procedure of gradual increase in environmental complexity in the production of complex IBCs and provide greater generality to the results found by Cavalcanti. However, the study provided no comparison of microcultures exposed of gradually increasing complexity with continued exposure of a microculture to the more complex environment. For this reason, it is clear that the procedure analogous to modeling was effective in producing complex IBCs, but not that it was more effective than the continuous exposure of a microculture, for the same number of cycles, to the more complex environment.
Acesso aberto (Open Access)
Cuidados com os pés diabéticos: investigação de variáveis que determinam o seguimento de regras de tratamento
(Universidade Federal do Pará, 2013-06-20) NOVAES, Vera Ribeiro; ALBUQUERQUE, Luiz Carlos de; http://lattes.cnpq.br/5261537967195189
One of the most serious complications of diabetes mellitus (DM) is neuropathy that affects the skin sensitivity, causing decreased or even absent, facilitating the development of diabetic foot. Such complications can be reduced with adherence to treatment rules of foot care for diabetic patients. Therefore, this study aimed to evaluate the effects of rules, justifications for tracking and social reinforcement, and also compare the effects of a questionnaire (Questionnaire 2 - Q2) specifying the behavior of foot care with effect from another questionnaire ( Questionnaire 1 - Q1) without specifying such behaviors in six diabetic adults through the following instruments: Interview Script Initial Script Initial Questions, Observation Protocol feet, Questionnaire 2 - List of Behaviors Care Feet, Quiz 1 - Protocol Questions about Behavior Care Feet, Rules and Foot Care Rules with Additional Justifications for Foot Care. Seven meetings were held weekly, in which participants were exposed to procedure A (Baseline [Q2] - Q1 - Q2) and procedure B (Baseline [Q1] - Q2 - Q1) in Conditions 1 (social reinforcement), 2 (justification) and 3 (without social reinforcement / without justification). The results showed that half of the participants reported receiving no guidance foot care, four of the six had anatomical deformities in the feet, all had some aspect circulatory and dermatological, and only one participant wearing proper footwear. Terms of reported behaviors of foot care, it was found that participants exposed to Q2 (P11a, P21a and P31a) had a larger number of reports than participants exposed to Q1 (P12b, P22b and P32b). However, there is clear evidence in this study, treatment adherence. One fact that supports this assertion is the fact that the number of reported behaviors of foot care, participants presented P11a, P21a and P31a have decreased when these participants were exposed to Q1.
Acesso aberto (Open Access)
Discriminação auditivo-visual em adultos com deficiência auditiva e implante coclear
(Universidade Federal do Pará, 2013-03-21) PEREIRA, Fabiane da Silva; GALVÃO, Olavo de Faria; http://lattes.cnpq.br/7483948147827075
The expectation of the cochlear implant (CI) user is recovering auditory sensitivity and understands spoken language. Considering the auditory rehabilitation as a prerequisite for the development of language skills, the aim of this study was to investigate the effect of training on the behavior of the listener to speaker in this group, check the emergence of relationships and the generalization to indirectly taught voice different frequency. Participated of the study three adults with profound, bilateral, neurosensory hearing, loss post-lingual, CI users, with time deprivation (TD) ranging from 5 months to 23 years. Data were collected with a computer with touch screen and application programming routines for the teaching and testing. The teaching program, with seven stages, had choice according to the model. Phase 1) Pre-train for habituation, the participant with auditory-visual tasks by fading out, 2) Pre-test naming and reading, to select 8 words for training, 3) Training of relations between dictated words and figures; 4) Training of relations between dictated words and written words; 5) Testing equivalence class, which were not directly taught; 6) generalization testing, with the dictated words, with an adult male voice; 7) Post-test of picture naming and word reading. Two of the three participants learned the tasks (Phases 3 and 4), and showed equivalence class (Phase 5) e generalization (Phase 6). All of the participants improved their ability of speaking after the study (Phase 7). The performance of the participant with 23 years of TD, which presented difficulties in oral language, was low, indicating further investigation of the variables due to flaw on the training, or to the IC operation, or inappropriate use of the device, etc. More studies are required to evaluate the potential of the procedure adopted for the auditory rehabilitation of CI users.
Acesso aberto (Open Access)
Discriminação com três tipos de contingências supressivas: extinção, punição e extinção + punição
(Universidade Federal do Pará, 2010) FARIAS, Danielle Chaves de; CARVALHO NETO, Marcus Bentes de; http://lattes.cnpq.br/7613198431695463
In studies on stimulus control is predominantly used reinforcement in SD and Extinction in SΔ to establish a simple discrimination. Few studies used Punishment in SΔ to establish such a differential responding, however, most of those produced faster learning than traditionally achieved with extinction only. When this type of procedure was used, in general, the electric shock was used as punishment. Carvalho Neto and Cols. have experimented a hot air blast (HAB) as an aversive alternative stimulus and so far successed in suppressive contexts (contingent and non contingent presentation) and negative reinforcement (escape and avoidance). Carvalho Neto and Farias (2006) and Carvalho Neto and Costa (2008) tested the HAB as suppressor in SΔ seeking to produce a light/dark discrimination and punitive contingencies in these studies were more effective than the traditional. However, some methodological problems were identified in these studies that limited their conclusions. This study sought to control some of these variables, in particular, the passage of fixed time and type of scheme in place. Six male rats were divided into three conditions: Extinction, Punishment and Extinction+Punishment. An operant conditioning box adapted to HAB was used. The procedure for the three conditions was the same, except for the sessions of Discrimination Training (reinforcement in SD for all conditions and during SΔ: Extinction for the extinction condition, Punishment for the Punishment condition and Punishment+Extinction for Punishment+Extinction condition). The subjects of the conditionsin wich the punishment was used showed a discriminated responding while the subjects assigned to Extinction condition failed to produce this responding pointing that the use of aversive control was more efficient that the traditional procedure.
Acesso aberto (Open Access)
Discriminação simples auditiva em Macaco-prego (Cebus apella)
(Universidade Federal do Pará, 2009-03-11) MACHADO, Francisco José Freitas; SOUZA, Carlos Barbosa Alves de; http://lattes.cnpq.br/1264063598919201
The acquisition of generalized discriminative relational repertoires represents a complex discriminative capability in the interaction on any species with its environment, having, for much time, being considered to be exclusively human. There are few researches on this capability in non-human primates in the auditory modality, and even less about their multimodal discriminatory repertoire, which characterizes much of the complex discriminative human behavior. This study investigated the possibility of a capuchin monkey (Cebus apella) to learn to respond appropriately to different acoustic stimuli by the use of a simple discrimination procedure. The subject was exposed to five pairs acoustic stimuli: each pair was always composed of one sound with a predominance of high frequencies and another of low frequencies; one of them with a function of positive stimulus (S +) and the other of negative stimulus (S-). The criteria adopted for the presentation of a new pair of stimuli was the achievement of a rate of response for the (S-) equal of inferior more than 25% of the rate for the (S +), for five consecutive sessions. The subject reached the criteria for all five pairs of stimuli. The effects of learning set and the physical properties of the stimuli are discussed, as well as procedural differences in regard to previous studies. These results suggest the possibility of using capuchin monkey as an animal model in research on complex discriminative repertoires.
Acesso aberto (Open Access)
Discriminações condicionais após treino de pareamento consistente de estímulos complexos
(2004-08) ASSIS, Grauben José Alves de; BAPTISTA, Marcelo Quintino Galvão; KATO, Olivia Misae; MENEZES, Aline Beckmann de Castro
The aim of this study was to verify the formation of conditional discriminations through a consistent matching training procedure with complex sample stimuli. Four university students were trained in the formation of AF, BE e DC conditional relations using simple stimuli and explicit differential reinforcement (Phase 1). They were subjected to consistent matching-to-sample training on the AB-E/F and AD-C/F relations involving complex sample stimuli (Phase 2). These participants were given the transitive and equivalent tests. Training trials were then "dismembered" (simplified) from AB-E/F, and AD-C/F sequences to AB-E; AB-F; AD-C; AD-F sequences, and the students were again tested for transitivity and equivalence (Phase 3). All participants reached the learning criterion. Two of them demonstrated the emergent relations tested before and after simplified training, and demonstrated response stability. These results indicated that the dismembered procedure was appropriate for reversing the restricted stimulus control.
Acesso aberto (Open Access)
Dois estudos em análise do comportamento: emergência de leitura após diferentes tipos de ensino de sílabas e palavras e introdução ao letramento analítico-comportamental
(Universidade Federal do Pará, 2015-06-28) MESQUITA, Alex Andrade; ASSIS, Grauben José Alves de; http://lattes.cnpq.br/0722706223558223
Reading can be understood as a complex network of relations between stimuli and responses. Study 1 aimed verify the effect of different types of syllable teaching (before or along with the word) and word sizes (two syllables or three syllables) on the development of recombinative and comprehension reading, perform a typology of word naming errors, and verify if the teaching method were considered reinforcing by the participants. The study participants were twelve children aged six to seven years, who were taught to read through the MTS and CRMTS procedure. The results showed that the type of syllable teaching had little influence on the recombinative and comprehension readings, but the participants who learned three syllables words developed a repertoire of recombinative reading superior to those who learned two syllables words and presented fewer errors. The most common type of error was to the exchange of syllables and the syllabication of the word. All children evaluated positively the teaching method. We conclude that the teaching of larger words can facilitate the generalized recombinative reading. In study 2 a bibliographic review of the narrative type was carried out with the objectives of: 1) presenting briefly the most used literacy methods in Brazil; 2) describe literacy in behavioral terms; 3) propose a new behavioral-analytic method of literacy. We verified that the most used literacy methods were: synthetic, with emphasis on the phonic, analytical, whole language, social constructivism and the Paulo Freire method. Quotations to behaviorist methods are few and often negative. Literacy involves complex behavioral processes and it can be reconciled with behavioral analysis as long as the behavioral objectives are clear and preferable immediate differential consequences follow the learning.
Acesso aberto (Open Access)
É possível gerar “insight” através do ensino dos pré-requisitos por contingências de reforçamento positivo em Rattus norvegicus?
(Universidade Federal do Pará, 2006) TOBIAS, Gracy Kelly da Silva; CARVALHO NETO, Marcus Bentes de; http://lattes.cnpq.br/7613198431695463
The discussions about creativity indicate difficulties in the definition of what would be an "original" or "creative" pattern and in identifying what variables would control it. Among the interpretations of this phenomenon there is one which is called spontaneous "interconnection of repertoires", when two or more different repertoires, learned in separate, join in new situations producing original sequences of behavior. The problem solving in a sudden way through this interconnection was called "Insight". One process participating in that interconnection would be "Functional Generalization". The present study replicated with some changes, using three rats (Rattus norvegicus) as subjects (S1, S2 and S3), the original work of Epstein (1985b) and investigated the role of "Functional Generalization" in the interconnection of repertoires. The subjects S1 and S2 were taught three different repertoires separately. The S1 learned (1) to push a cube toward a goal, (2) to climb and to rise on the cube and (3) to pull a string. The S2 learned (1) to push the cube with no goal, (2) to climb and to rise on the cube and the (3) to pull a string. The S3 just learned (1) to climb and to rise on cube and (2) to pull a current. After the training they were put into a problem-situation-problem that would demand the interconnection of the learned abilities to arrive to the final step which was to pull a string. The S1 and S2 solved the problem in different ways: one solved in a random way and the other solved after additional training to climb and to pull a string which established important links for the resolution. The S3 didn't solve the problem. The data indicated that functional generalization could be explained as simple generalization and that this would not be a fundamental requirement for the sudden resolution of the problem.
Acesso aberto (Open Access)
Efeito de instruções sobre a demonstração de equivalência entre posições
(2003) MEDEIROS, Carlos Augusto de; RIBEIRO, Antonio de Freitas; GALVÃO, Olavo de Faria
Most equivalence studies with humans resulted in stimulus equivalence class formation irrespectively of stimulus characteristics. However, a series of recent studies with location as the relevant stimulus dimension showed mainly negative results. This study intended to verify whether instructions clarifying the participant's tasks would improve his performance in the formation of three equivalence classes composed by the relative locations of nine squares in a three by three matrix. Ten college-student participants received minimal instructions. Eleven other students received additional instructions advising them to consider what they learned to that point (baseline) in the next trials (tests). Ten participants that received additional instructions and five that received minimal instructions formed the three equivalence classes. The additional instructions facilitated equivalence formation. However the present study also differs from previous ones in two aspects: 1) in using a different color for each class, and 2) in allowing a larger number of tests before concluding for the failure to form equivalence, and therefore allowing further opportunity for extinction of responses incompatible with the programmed contingencies.
Acesso aberto (Open Access)
Efeitos da exposição a macrocontingências e metacontingências na produção e manutenção de respostas de autocontrole ético
(Universidade Federal do Pará, 2013-01-24) VASCONCELOS NETO, Aécio de Borba; TOURINHO, Emmanuel Zagury; http://lattes.cnpq.br/5960137946576592
A particular case of self-control happens when the conflict between immediate and delayed consequences are associated with consequences more favorable to the individual, or more favorable to the group. In such cases, responding under control of delayed consequences more favorable to the group can be called Ethical Self-Control. Literature on Behavior Analysis points out that the selection of self-control and ethical self-control depends on contingencies delivered by members of the group, which permits us to say that these phenomena are cultural products. This work investigated the selection, maintenance, and transmission of ethical self-control in two settings analogous to cultural contingencies: macrocontingencies and metacontingencies. Six microcultures, two in each of the three studies, were exposed to a task in wich each participant had to choose a line in a colored 10x10 matrix. There were individual consequences according to which choices of odd lines produced three tokens that could be exchanged for money, and choices of even lines produced only one token. Cultural contingencies allowed the production of school items that would be donated to public schools. The production of such items depended up on the existence of macrocontingencies or metacontingencies. The first study evaluated the effect of the cumulative product of independent operant responses functionally over the behavior of participants in a laboratory microculture, when individual consequences that produce higher magnitude reinforcers are concurrent with the production of consequences more favorable to the culture, with individual consequences and cultural consequences different in nature. In this study, choices of even lines produced lower magnitude reinforcers and one school item. The results showed the effectiveness of the cumulative product in the installation and maintenance of self-control responses, but only after a long exposure to the macrocontingency. The changing in generations might have contributed as well to the necessity of a long exposure. The second analyzed if Interlocked Behavioral Contingencies (IBCs) and their associated Aggregate Products (AP) can be selected by cultural consequences different in nature from the individual consequences, in situations where the production of the cultural consequence is concurrent with the higher magnitude individual consequences. In this study, the production of school items was contingent to the occurrence of IBCs+APs that involved choices in three even lines with different colors. Results suggest that the cultural consequence was effective in the selection and maintenance of ethical selfcontrol responses. The data also suggests that the IBC’s+APs keep recurring for a large number of cycles even after suspending the metacontingency. Finally, the third study investigated the effect of cultural consequences and cumulative product on ethical self-control responses, in situations in wich the production of the cultural consequences and the cumulative product are concurrent with responses that produced a higher magnitude reinforcer, in alternate conditions of macrocontingencies and metacontingencies. In this study, two microcultures were exposed to alternate conditions of macrocontingencies (as in Study 1) and metacontingencies (as in Study 2). Results suggest that both the cultural consequence and the cumulative product were effective in the selection of ethical self-control. When exposed in alternating conditions, though, it was not possible to replicate the same frequency of selfcontrol responses as in the conditions of Study 2 where there was no exposure to macrocontingencies. The data also suggest that macrocontingencies were not effective in the selections of IBCs+APs, but were effective in the maintenance after they were selected in metacontingency conditions. In macrocontingency conditions a larger number of school items were produced, but the probability of producing items in metacontingency conditions were lower than in macrocontingencies conditions, suggesting that the former was more effective in the production of cultural consequences.
Acesso aberto (Open Access)
Efeitos da exposição a mudanças nas contingências sobre o seguir regras
(2006-04) ALBUQUERQUE, Luiz Carlos de; SILVA, Francynete Melo e
By investigating the effects of experimental histories on discrepant rule following contingencies, nine university students were exposed to a matching-to-sample procedure; the task was to point out, in a set order, it one of three comparison stimuli. Each condition comprised four sessions. The contingencies in Session 1 were altered in Session 2, reestablished in Session 3 and remained unchanged in Session 4, which began with the discrepant rule. The three conditions differed as to the form of establishment of the alternative behavior to that specified by the discrepant rule. Independent of how the behavior was established in Session 1, whether by contingencies (Condition 1) or by rules (Conditions 2 and 3), only those participants who responded correctly in Sessions 2 and 3 (n = 7) did not follow the discrepant rule in Session 4. It is also discussed some of the characteristics that an experimental history should have to interfere with discrepant rule following.
Acesso aberto (Open Access)
Efeitos da manipulação do número de escolhas sobre o desempenho em tarefas de discriminação simples em macaco-prego (Cebus cf. apella)
(Universidade Federal do Pará, 2010-11) QUEIROZ, Lidianne Lins de; BRINO, Ana Leda de Faria; http://lattes.cnpq.br/9930065472602966; BARROS, Romariz da Silva; http://lattes.cnpq.br/7231331062174024
There are several variables that can affect the precision of repertoire acquisition in discrimination training. The number of choices presented in the discrete trials is still one variable little explored in the context of verifying in which situations the discriminative control is more easily established. The general objective of the present work is to describe the effects of the manipulation of the number of choices on performance in simple discrimination tasks in capuchin monkeys (Cebus cf. apella). In Experiment I, the subjects were given a discriminative training with three types of trials (2, 4, and 9 choices). A stimulus control test assessed if the acquired repertoire could be maintained when the stimuli used in the three types of trials were then presented in the two-choice fashion. Additionally, in Experiment II, we evaluated if the correct responses in previous discrimination training occurred due to selection of the S+, rejection of the S-, or mixed control (selection and rejection). This evaluation was carried out through a mask procedure. The results in Experiment I suggest that the exposure to a larger number of choices is an efficient strategy to establish the discriminated responses since the performance was accurate even when the number of choices was reduced to two. The results obtained in Experiment II show different data for the two subjects. M30 showed control by rejection and preference for mask and M31 showed mixed control. The present research shows a path to a more complete analysis of stimulus control in studies on the manipulation of the number of choices and indicates that this variable may be an efficient way to reduce the difficulty in acquisition of discriminations in applied context.
Acesso aberto (Open Access)
Efeitos da punição sobre respostas mantidas em diferentes sistemas econômicos (aberto e fechado) em Rattus norvegicus
(Universidade Federal do Pará, 2010-01-08) RODRIGUES, Bernardo Dutra; CARVALHO NETO, Marcus Bentes de; http://lattes.cnpq.br/7613198431695463
The behaviors economics systems are defined as different relationships between consumption and the way the organism gets. There are typically two types of economic systems: a closed economy, where the subject’s daily food ration only could be acquired in the experimental session, and the open economy in which, the subject receive a complementary food after the session. This study aimed to investigate the effects of punishment on positive responses under different economic systems. Were performed two experiments. In Experiment 1 two Rattus norvegicus, Wistar, males, deprived of water for 24 hours, divided between the two economies: A1 (open) and F1 (closed). The aversive stimulus was a Hot air blast (HAB) for 5 seconds and contingent for each pressure response to the bar (RPB). Each subject went through the following phases: Operant Level, Modeling RPB, Conditioning in CRF, Punishment and Reconditioning. In Experiment 2 were used four Rattus norvegicus, Wistar, male, deprived of water for 24 hours, divided into two pairs: FAF (Closed / Open / Closed) and AFA (Open / Closed / Open). The aversive stimulus was a shock of 1.3mA for five seconds and contingent for each RPB. During the experiment, both passed by the following phases: Operant Level, Modeling RPB, Conditioning in FR10, Punishment (in one economy), Reconditioning, Punishment (in an economy different from above), another Reconditioning, finally, a session Punishment the initial economy. Data from two experiments showed an average suppression in responding during the phases of punishment compared to the stages of Conditioning/Reconditioning, in both economies and in all subjects: 48.7% (F1), 96.6% (A1 ), 99.9%, 99.9% and 89.8% (FAF1), 93.2%, 99.4% and 84.8% (FAF2), 99.8%, 83.6% and 95% (AFA1), 92.3%, 90.9% and 91.6% (AFA2). These results demonstrate that both the shock and the JAQ functioned as aversive stimuli, but the difference between the two economies was higher in subjects who had answered punished with the JAQ.