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Ce travail de thèse cherchait à étudier les compétences verbales chez les individus atteints de Troubles du Spectre Autistique, en se concentrant en particulier sur l'impact du traitement sur le développement de ces compétences, ainsi que sur l‘explication comportementale de la grammaire générative. Notre première étude comparait l'effet du traitement comportemental et du traitement pluridisciplinaire sur les aptitudes verbales des enfants avec TSA en milieu naturel. Les effets du traitement ont été évalués par l'analyse de résultats à des tests standardisés évaluant le vocabulaire commun, le vocabulaire spatial, la syntaxe et le raisonnement non – verbal, et en comparant le nombre d'enfants qui avaient intégré dans le milieu ordinaire (sans aménagement particulier). Les participants avec les meilleurs scores aux tests standardisés et dont les vitesses d'apprentissage atteignent ou dépassent la norme appartenaient au groupe ayant bénéficié d‘un traitement comportemental intensif précoce. C'est aussi dans ce groupe que se trouvait le plus fort pourcentage de participants ayant intégré le milieu ordinaire sans soutien particulier. Nous avons également exploré la façon dont les caractéristiques des enfants pourraient influencer l‘effet du traitement. Nos résultats indiquent que l'âge de début de traitement avait un effet que sur les vitesses d'apprentissage des compétences verbales et cela uniquement pour les participants ayant bénéficié d‘un traitement comportemental intensif. Nous avons aussi exploré la possibilité d'une relation entre la sévérité des symptômes à l'âge de 4-5 ans et les vitesses d'apprentissage et la sévérité des symptômes après environ 4ans de traitement comportemental intensif. L'analyse des données révèle que la gravité des symptômes à l'âge de 4 à 5 ans seraient prédictifs de la sévérité des symptômes qui seraient observés quelques années plus tard. Enfin, nous avons effectué un suivi et comparé les vitesses d'apprentissage après en moyenne 2 ans et après en moyenne 4 ans de traitement comportemental intensif. Une variabilité importante a été observée dans l'évolution des taux d'apprentissage d'un participant à un autre. Enfin, afin de mieux appréhender cette hétérogénéité, nous avons étudié la vitesse d'acquisition des compétences d'enfants avec TSA ayant bénéficié d‘un traitement comportemental intensif pendant en moyenne 4 ans. L'analyse des courbes d'apprentissage indique qu'il y aurait deux types d'apprenants ; des apprenants rapides et des apprenants lents, et cela in dépendamment de l'âge de début de traitement. Notre étude comparative a montré que si le traitement comportemental intensif résultait en des gains plus importants au niveau des aptitudes verbales des enfants atteints de TSA que le traitement multidisciplinaire, toutes les compétences verbales n‘étaient pas affectés de la même manière . En effet, les améliorations au niveau du vocabulaire sont plus importantes que celles observées pour la grammaire. Nous nous sommes attachés dans la deuxième partie de cette thèse à tenter d‘appréhender ces compétences grammaticales dans le cadre comportemental au sein d‘une population avec et sans troubles autistiques. Pour ce faire, nous avons utilisé des consignes réduites au strict minimum, des procédures d‘apprentissage des séquences et de Matching to Sample afin d‘apprendre aux participants à répondre à des stimuli. Ces réponses à ces stimuli étaient considérés comme analogues à certaines de compétences verbales complexes, notamment les relations syntaxiques, et les classes de mots (par exemple, les noms, les adjectifs, les verbes). / The current thesis aimed at investigating verbal skills in individuals with ASD, focusing in particular on the impact of treatment on the development of these skills, as well as attempting to contribute to a more complete behavior analytic explanation of complex generative language.Our first study aimed at comparing the effect of behavioral treatment and multi disciplinary treatment on the verbal skills of children on the autism spectrum in natural settings. Treatment outcome was assessed by analyzing the results to standardized tests evaluating common vocabulary, spatial vocabulary, syntax and non-verbal reasoning and by comparing the number of children who had been mainstreamed into regular classrooms without the help of an aide. Participants with the best test scores on the standardized tests and whose learning rates reached or exceeded normal learning rates of language skills belonged to the group that received early intensive behavioral treatment. It is also in this group that we find the highest percentage of participants who were mainstreamed without special support. We also set to explore how child variables could influence treatment outcome. Our results indicated that age of intake had an effect only on the learning rates of verbal skills and that only for participants who received intensive behavioral treatment. In addition, we explored the possibility of a relation between the severity of symptoms at the age of 4-5 years and the learning rates and the severity of symptoms after approximately 4 years of intensive behavioral treatment. Data analysis revealed that severity of symptoms impairing the development and interfering communication at the age of 4 to 5 years were predictive of the severity of the symptoms that would be observed a few years later. We also conducted a follow up and compared the learning rates after on average of 2 years of intensive behavioral treatment and after on average 4 years of treatment. Significant variability was observed in the evolution in learning rates from one participant to another. Finally, in an attempt to better understand this heterogeneity, we studied the rate of skill acquisition over a 4-year period of children on the autism spectrum who received intensive behavioral treatment. The analysis of the learning curves indicated that there were two types of learners, fast learners and slow learners and that, regardless of age of onset of treatment.Our comparative study showed that whilst intensive behavioral treatment resulted in more important gains in the verbal skills of children with ASD than multi disciplinary treatment, all verbal skills were not affected in the same way. Indeed the gains in vocabulary were more important than the ones in grammar. We thus set in the second part of this thesis to conduct a behavioral analysis of the development of complex verbal skills in the typically developing population but also in the population on the autism spectrum. We used minimal verbal instructions, and matching to sample and sequence training procedures to develop responding to stimulus classes. These were considered analogous to complex verbal skills, namely syntactic relations and classes of verbs, nouns or adjectives.

Made available in DSpace on 2016-04-29T13:17:52Z (GMT). No. of bitstreams: 1 Milena Moura Fe Araujo Portela.pdf: 1073172 bytes, checksum: 45769ba9ffe809a1ec1db99a20ad08b1 (MD5) Previous issue date: 2014-03-27 / The objective of this work was to investigate whether the procedure of Differential Observing Responses (DOR) used in a training with words as stimuli with critical differences could reduce/eliminate the restricted stimulus control in autistic participants. For this, six children diagnosed with autistic disorder underwent tasks of matching-tosample simultaneous (SMTS). Three of them participated in the control group and three in the experimental group. There were used in attempts to SMTS, three sets of words: BO set (good, good, box), PA set (par, peace, father) and ME set (month, my, honey). The attempts with critical differences included stimuli of a same set and the ones with multiple differences had stimuli of the three sets of words. Children in the experimental group were submitted to seven phases: initial evaluation of restricted stimuli control, base line 1, DOR condition, baseline 2, the generalization test, final evaluation of restricted stimulus control and follow-up. Children in the control group were only submitted to the phases of the initial evaluation, base line 1 and base line 2. For two participants in the experimental group, a delineation of multiple base line among participants was used. For the other participant in the experimental group, it was used a procedure of multiple base line among sets. The analysis of the results identified that the answer under restricted stimulus control of the experimental participants was reduced. This result was observed even with the return to the base line (reversal). In addition, it was achieved a high rate of correct answers on the generalization test, in which the stimuli were changed position. Another significant result was achieved in reapplying the test one month after the end of the procedure; the results of the participants remained accurate, indicating generality in time regarding the responding reduction under strict control in tasks of SMTS / A presente pesquisa teve como objetivo investigar se o procedimento de Resposta de Observação Diferencial (DOR) utilizado em um treino com palavras como estímulos com diferenças críticas era capaz de reduzir/eliminar o controle restrito de estímulos em participantes autistas. Para isso, seis crianças diagnosticadas com o transtorno autista foram submetidas a tarefas de matching-to-sample simultâneo (SMTS). Três delas participaram do grupo controle e três do grupo experimental. Foram utilizadas nas tentativas de SMTS três conjuntos de palavras: BO (boa, bom, box), PA (par, paz pai) e ME (mes, meu, mel). As tentativas com diferenças críticas continham estímulos de um mesmo conjunto e as com diferenças múltiplas, dos três conjuntos de palavras. As crianças do grupo experimental foram submetidas a sete fases: avaliação inicial do controle restrito de estímulos, linha de base 1, condição DOR, linha de base 2, teste de generalização, avaliação final do controle restrito de estímulo e follow-up. As crianças do grupo controle passaram apenas pelas fases de avaliação inicial e linhas de base 1 e 2. Para dois participantes do grupo experimental foi utilizado ainda um delineamento de linha de base múltipla entre participantes. Para o outro participante do grupo experimental utilizou-se um procedimento de linha de base múltipla entre conjuntos. A análise dos resultados permitiu identificar que o responder sob controle restrito de estímulos dos participantes experimentais foi reduzido. Esse resultado manteve-se mesmo com o retorno à linha de base (reversão). Além disso, foi obtido um alto escore de acertos no teste de generalização, no qual os estímulos tiveram suas posições recombinadas. Outro resultado relevante foi obtido na reaplicação desse teste um mês após o término do procedimento. Os resultados dos participantes mantiveram-se precisos, indicando generalidade no tempo quanto à redução do responder sob controle restrito em tarefas de SMTS

Made available in DSpace on 2016-06-02T19:44:10Z (GMT). No. of bitstreams: 1 4138.pdf: 959441 bytes, checksum: f922db6271d5dded1485b1730ab4e424 (MD5) Previous issue date: 2011-09-30 / Universidade Federal de Minas Gerais / Two studies evaluated emergent stimulus-stimulus relations and selection and rejection controlling relations. Study 1 evaluated controlling relations after two types of conditional discrimination training: standard matching-to-sample (MTS) tasks and tasks using the blank comparison MTS. Participants were five preschool children and two adults and one child with Down syndrome. Two conditions were employed. Condition I involved standard twocomparisons MTS. Condition 2 used mask procedure (or blank comparison procedure) to produce select and reject relations. Both conditions trained AB and BC relations, assessed emergent relations AC and CA and employed new stimulus probes to assess selection and rejection controlling relations in each taught conditional discrimination. Condition 2 also evaluated stimulus class expansion after teaching CD. All participants showed one-node emergent relations. Seven showed class expansion. However, some participants showed positive results for equivalence immediately, others, delayed emergence or yet only after resumption of training with new sets of stimuli. New stimulus probes results showed variability initially, possibly indicating experience with the task as important variable. Novelty control predominated in some cases. Study 2 assessed whether employing new stimulus probes at different stages of the procedure (after conditional discrimination training or after tests for emergent relations) would produce different patterns of responding. Six children were taught two sets of conditional discriminations (BC / AB and EF / ED, in that order). Half of the participants had new stimulus probes after each trained relation for the first stimulus set and after equivalence tests for the second set of stimuli. The other half of participants had this order reversed. Three participants showed equivalence for both sets of stimuli. The stage of new stimulus probes application did not alter the probe results. Taken together, the results of both studies suggest that performance on new stimuli probes is not related to performance on tests for equivalence class formation. / Dois estudos avaliaram o estabelecimento de relações emergentes entre estímulos e do controle de estímulos por seleção e por rejeição. O Estudo 1 empregou dois tipos de treino de discriminações condicionais em tarefas de matching-to-sample (MTS): treino padrão e treino com uso de mascara. Cinco crianças pre-escolares e dois adultos e uma criança com Síndrome de Down participaram do Estudo 1, composto por duas condições. Para a Condição I a linha de base envolveu MTS padrão com duas escolhas. A Condição 2 empregou o procedimento de mascara (ou comparação único) na linha de base visando produzir controle por seleção e por rejeição. Para as duas condições foram ensinadas as relações AB/BC, avaliadas as relações emergentes CA e AC. Em seguida, sondas com estímulos novos avaliaram o controle de estímulos por seleção e por rejeição em cada discriminação condicional ensinada. A Condição 2 avaliou também expansão de classes de estímulos apos ensino da relação CD. Todos os participantes apresentaram desempenho indicativo de formação de classes de equivalência na Condição 1 e para as relações com um nódulo da Condição 2. Sete participantes apresentaram expansão de classes. No entanto alguns participantes apresentaram resultados positivos para equivalência imediatamente, outros, emergência atrasada e ainda, alguns participantes apresentaram resultados positivos apenas com o reinicio do treino com novos conjuntos de estímulos. Os resultados nas sondas com estímulos novos mostraram variabilidade entre participantes nas aplicações iniciais, indicando possivelmente a experiencia com a tarefa como variável importante. Em alguns casos predominou o controle pela novidade. O Estudo 2 avaliou se a aplicação das sondas com estímulos novos em estágios diferentes do procedimento (apos ensino de cada discriminação condicional ou apos testes de relações emergentes) produzem diferentes resultados. Seis crianças em idade escolar participaram do estudo que empregou o treino de dois conjuntos de discriminações condicionais (BC/AB e EF/DE, nesta ordem). Metade dos participantes tiveram as sondas com estímulos novos empregadas apos o treino de cada discriminação para o primeiro conjunto treinado e apos os testes de equivalência para o segundo conjunto de estímulos. A outra metade dos participantes teve esta ordem invertida. Três participantes apresentaram formação de classes para os dois conjuntos de estímulos. O momento da aplicação das sondas com estímulos novos não alterou o desempenho dos participantes diante das mesmas. Os resultados dos dois estudos em conjunto sugerem que o desempenho nas sondas com estímulos novos não esta relacionado com o desempenho em testes de formação de classes de estímulos equivalentes.

Five humans were exposed to a matching to sample task in which the delay (range = 0 to 32 seconds) between sample stimulus offset and comparison onset was manipulated across conditions. Auditory stimuli (1” tone) and arbitrary symbols served as sample stimuli for three (S1, S2, S3) and two (S4 and S5) subjects, respectively. Uppercase English letters (S, M, and N) served as comparison stimuli for all subjects. Results show small but systematic effects of the retention interval on accuracy and latency to selection of comparison stimuli. The results fail to show a difference between subjects exposed to auditory and visual sample stimuli. Some reasons for the failure to note a difference are discussed.

Made available in DSpace on 2016-04-29T13:17:48Z (GMT). No. of bitstreams: 1 Victoria Boni Albertazzi.pdf: 721264 bytes, checksum: 12e708827400af54f3a28bfc8097b7fd (MD5) Previous issue date: 2013-05-23 / Conselho Nacional de Desenvolvimento Científico e Tecnológico / Operant behavior can be placed under stimulus control, and the relationship between discriminated responding and such stimuli can also be controlled by other stimuli, generating the behavioral process named conditional discrimination. Utilizing a rat as a subject, in order to study if it s own behavior could be used as conditional stimulus, controlling choice behavior in a simulateneous discrimination, a procedure was planed based on the proposal by Lionello-DeNolf and Urcuioli (2003). After preliminary training, central lever pressing was placed under the control of a buzzer, in a procedure in which responses emmited in tone cycle accessed a reinforcer (water) and terminated the presentation of the tone, with mean intertrial intervals (ITIs) of initially 30 seconds (range 15-45s), and passing, after two sessions, for 10 seconds mean (range 5-15s). The ratio of lever presses required for water access was gradually increased, and, after reaching FR10, a mixed schedule training was implemented, in which trials with requirements of one or 10 responses were randomically presented. The subject was then placed in a matching-to-sample situation, in which two other levers were presented, and the behavior established in the previous phase accessed comparison stimuli: a blinking and a steady lights, which alternated positions randomically. With the introduction of such condition, central lever press behavior deteriorated; in trials in which comparison stimuli were accessed, choice behavior seemed to be under the control of the position of the stimuli. The role of the ITIs duration in the establishment of simple discriminations was discussed, as well as diferences in the results of such procedures with pigeons and rats / O comportamento operante pode ser colocado sob controle de estímulos antecedentes, e a relação entre o responder discriminado e tais estímulos resultante desse processo pode, por sua vez, ser controlada por outros estímulos, gerando o processo comportamental chamado de discriminação condicional. Utilizando-se de um rato como sujeito, a fim de se estudar se o responder do mesmo poderia servir de estímulo condicional, controlando o comportamento de escolha em uma situação de discriminação simultânea, foi elaborado um procedimento com base no proposto por Lionello-DeNolf e Urcuioli (2003). Após passar por fases preliminares de treino ao bebedouro e seleção de pressão à barra central, esse responder foi colocado sob controle de um tom, em um procedimento no qual o responder em períodos de tom acessava o reforçador e terminava a apresentação do tom, com intervalos entre tentativas (ITIs) tendo inicialmente média de 30 segundos (amplitude 15-45s), e passando, após duas sessões, para média de 10 segundos (amplitude 5-15s). A razão de pressões à barra requeridas para acessar gotas de água foi aumentada, e, após chegar em FR10, foi feito um treino em esquemas mistos, no qual se alternavam, de maneira randômica, tentativas nas quais a água era liberada em CRF e tentativas nas quais a água era liberada em FR10. O sujeito foi então colocado em uma situação experimental de matching-to-sample, na qual foram apresentadas duas outras barras na caixa, e o comportamento estabelecido na fase anterior acessava estímulos comparação: uma luz constante e uma piscante, que alternavam em posição. Com a introdução do procedimento, o responder do sujeito na barra central se deteriorou; nas tentativas em que conseguiu acessar os estímulos comparação, seu comportamento de escolha pareceu estar sob controle da posição dos estímulos. Discute-se o papel do tamanho dos ITIs no estabelecimento das discriminações simples, bem como diferenças nos resultados do procedimento com pombos e ratos

Made available in DSpace on 2016-04-29T13:18:14Z (GMT). No. of bitstreams: 1 Marcio Alleoni Marcos.pdf: 10544131 bytes, checksum: 262b39e2f014dd4f405ad65128bfd163 (MD5) Previous issue date: 2009-05-16 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / Considering the self reports of individuals about past events, the literature points out that the precision of the reports of individuals over the performance of a given task, after a certain amount of time, could be affected by what happens inbetween this given task and the report. Therefore, this study aimed to investigate: a) What is the effect of an intermediate task of similar topography matching to sample (MTS) to a target task delayed matching to sample (DMTS) on the report of the performance in this task?; b) What are the effects of report requirements that take place between the given task and the final report?; c) Would these report requirements alter the report of the given task, thus making it more accurate?; d) Would the requirement of a report that involved the construction of a similar stimulus to the comparing stimulus selected in the given task alter the final report of performance in this task?; e) Would the requirement of more than one report in a DMTS task and the final report of this responding behavior interfere the final report? Eleven college students participated in this study. They were submitted to two sessions, each with thirty-two attempts. Each cycle was composed of a given task and a report of this task. The thirty-two attempts were divided in four experimental conditions, in which were added intermediate oral reports (vocal verbal responses) and of construction (CRMTS - constructed response matching to sample). The execution of a MTS intermediate task was also requested in some conditions, being MTS the only task that had programmed responses. The results of every participant indicated that, the emission of a wrong response in a given task, foresees with great probability the error in report tasks; there were less mistakes in the given task for every participant in the second session; there is a tendency for a better performance in oral reports than in constructed reports; and the intermediate task didn t amount to a intervenient variable in the performance during the final report. It is discussed that the successive possibilility to behave in the situation to be reported and the extra stimulation provided presenting questions or the disposal of conditions for the construction of the necessary stimulus for an accurate final report. Another important question that emerged is that the requirement of an oral report might have helped a more specific identification of the stimulus peculiarity that controls the report response in the subsequent stages for the given task / Considerando os auto-relatos de indivíduos sobre eventos passados, a literatura aponta que a precisão do relato sobre o desempenho em uma tarefa-alvo após a passagem de certo tempo pode ser afetada pelo que ocorre entre esta tarefa e o relato. Assim, o presente trabalho procurou investigar: a) qual o efeito de uma tarefa intermediária de topografia semelhante de matching to sample (MTS) a uma tarefaalvo de delayed matching to sample (DMTS) sobre o relato do desempenho nesta tarefa?; b) quais os efeitos da solicitação de relatos que são interpostos entre a tarefaalvo e o relato final?; c) estes relatos alterariam o relato da tarefa-alvo e produziriam maior precisão no relato?; d) a solicitação de um relato que envolvesse a construção de um estímulo semelhante ao estímulo-comparação selecionado na tarefa-alvo alteraria o relato posterior sobre o desempenho nesta tarefa?; e) a solicitação de mais de um tipo de relato entre o desempenho em uma tarefa de DMTS e o relato final sobre este responder interferiria no relato final? Participaram do estudo 11 universitários, que foram submetidos a duas sessões, cada uma com 32 tentativas. Cada tentativa era composta de uma tarefa-alvo e de um relato sobre esta tarefa. Dividiu-se as 32 tentativas em 4 condições experimentais, em que se inseriu alternadamente relatos intermediários do tipo oral (resposta verbal vocal) e de construção (CRMTS constructed response matching to sample). Também foi solicitada, em algumas condições, a execução de uma tarefa intermediária de MTS, a única para a qual havia consequências programadas. Os resultados de todos os participantes indicaram que a emissão da resposta incorreta na tarefa-alvo prediz com grande probabilidade o erro nas tarefas de relato; que houve diminuição do número de erros na tarefa-alvo para todos os participantes na segunda sessão; que há tendência de melhor desempenho nos relatos orais do que nos relatos de construção e que a tarefa intermediária não constituiu uma variável interveniente no desempenho dos participantes no relato final. Discute-se que a sucesssiva possibilidade de se comportar na situação a ser relatada e a estimulação suplementar fornecida sob a forma de pergunta ou a disposição de condições para a construção do estímulo não foram suficientes para estabelecer o controle de estímulos necessário para um relato final preciso. Outra questão importante levantada é que a solicitação do relato oral pode ter auxiliado na identificação mais específica das particularidades do estímulo que controlaram a resposta de relato nas etapas seguintes à tarefa-alvo

The present experiment was conducted to investigate the effects of reinforcer magnitude on resistance to disruption of remembering and response rates. Pigeons were exposed to a variable-interval (VI), delayed-matching-to-sample procedure (DMTS) with two components (rich and lean). Specifically, completion of a VI 20 second (s) multiple schedule resulted in DMTS trials in both components. In a DMTS trial, a choice of one of two comparison stimuli (e.g., blue key) results in reinforcement if the choice matches some property of the sample stimulus presented previously. Sample and comparison stimuli are separated by a delay. Four delays (0.1, 4, 8, and 16 s) were used between the sample and comparison stimuli in the study. The difference between rich and lean components was the length of hopper duration following a correct response. The probability of reinforcement following a correct response in both components was .5. Each pigeon was exposed to 50 sessions of initial baseline and then 30 sessions of baseline between each disruptive condition (extinction, intercomponent interval [ICI] food, lighting the houselight during delays, and prefeeding). Separable aspects of the forgetting functions (initial discriminability and rate of forgetting) were examined by determining accuracy at each delay. During baseline, response rates were higher in the rich component relative to the lean. Accuracy decreased as delay increased in both rich and lean components, and accuracy was consistently higher in the rich relative to the lean component. During disruptive conditions, extinction, ICI food, and prefeeding disrupted response rates, but lighting the houselight during the delays had little effect. During the DMTS portion of the procedure, extinction and prefeeding decreased initial discriminability and lighting the houselight during the delay increased rate of forgetting. Intercomponent food had little effect on accuracy. Accuracy in the rich component was more resistant to disruption relative to the lean component during extinction. These results indicate that certain disruptors do not have the same disruptive effect across response rates and accuracy (e.g., ICI food). These data also suggest that when systematic differences in accuracy between rich and lean components are revealed, performance in the rich component tends to be more resistant to disruption.

A common procedural variation that facilitates the acquisition of conditional discriminations is to increase the time an organism spends in the presence of the sample stimulus by programming extended sample-observing response requirements. Despite their common use, there has been little empirical investigation of the effects of extended sample-observing response requirements. In the current study, four pigeons worked on a titrating delay matching-to-sample procedure in which the delay between sample offset and comparison onset was adjusted as a function of the pigeons' accuracy. The number of responses required to produce the comparison array was manipulated across conditions. Results show that all subjects were able to withstand longer delays between sample offset and comparison onset as sample-observing response requirements increased. These data show that the extent of the response requirement in the presence of the sample has systematic effects on conditional discrimination performances and should be considered in the design of experiments.

Em uma tarefa de emparelhamento com o modelo envolvendo duas escolhas, o participante pode aprender tanto a selecionar o estímulo correto (controle por seleção) quanto a rejeitar o estímulo incorreto (controle por rejeição). O presente trabalho investigou o efeito dos controles por seleção e por rejeição sobre a formação de classes de estímulos equivalentes e sobre a transferência de função discriminativa. O Capítulo 1 apresenta uma revisão metodológica que sistematizou os procedimentos utilizados para inferir a ocorrência desses controles, bem como os procedimentos utilizados para manipulá-los experimentalmente. O Capítulo 2 apresenta um experimento que investigou o efeito da manipulação da observação dos estímulos de comparação sobre o estabelecimento dos controles por seleção e por rejeição. Participantes adultos foram submetidos a um treino de discriminações condicionais por meio do procedimento de emparelhamento com o modelo com observação requerida (MTS-OR). Os resultados sugerem que a ocorrência do controle por seleção foi mais provável para os participantes que foram exigidos observar o S+ ao longo de todas as tentativas de treino; o controle por rejeição só ocorreu para os participantes que foram exigidos observar o S-. Nesse último caso, impedir os participantes de observar o S+ favoreceu o estabelecimento do controle pelo S-. Por fim, o Capítulo 3 apresenta um conjunto de experimentos que avaliou o efeito dos controles por seleção e por rejeição sobre os testes de formação de classe de equivalência e sobre a transferência de função discriminativa. O procedimento de MTS-OR, aliado ao uso de diferentes proporções de S+/S-, permitiu a manipulação experimental dos controles investigados. A transferencia de função foi avaliada por meio de uma tarefa discriminativa simples sucessiva envolvendo respostas ao teclado. Os resultados sugerem que os testes de reflexividade, bem como os de transitividade e de equivalência envolvendo um nodo, foram afetados diferencialmente por esses controles. Os resultados dos testes de transferência de função sugerem a formação de diferentes classes a depender do controle estabelecido, por seleção ou por rejeição / In a two-choice matching-to-sample task, the participant might learn either to select the correct stimulus (select control) or to reject the incorrect one (reject control). The present dissertation investigated the effects of select and reject controls upon equivalence-class formation and transfer of discriminative function. Chapter 1 presents a methodological review that analyzed procedures used to infer the occurrence of such controls and also procedures used to experimentally manipulate them. Chapter 2 presents an experiment that evaluated the effects of manipulating observing responses towards comparison stimuli upon the establishment of select or reject controls. Adults participated and were exposed to a conditional discrimination training in a matching-tosample task with observing requirements (MTS-OR). Results suggest that select control was more likely to occur for participants that were required to observe the S+ in every training trial; reject control occurred only for participants that were required to observe the S- in every training trial. In this last case, preventing participants from observing the S+ also increased the chances of control by the S-. Finally, Chapter 3 presents experiments that evaluated the effects of select or reject controls upon equivalence-class-formation tests and transfer of discriminative function. The MTS-OR procedure, allied with different proportions of S+/S-, allowed manipulating the controls that were investigated. The transfer of function was evaluated by means of a simple successive discrimination task involving key-pressing responses on the keyboard. The results suggest that the reflexivity tests, and also the one-node transitivity and equivalence tests, were differentially affected by such controls. Transfer of function test results suggest the formation of different classes depending on the control that was established, select or reject