The aim of the present study was to evaluate efficiency of the order of exposure to different types of conditional discriminations in the emergence of contextual control over the composition of stimulus equivalence classes as well as the transfer of this control between equivalent stimuli. Two experiments were conducted with four college studentes in each one. Both presentation of stimuli on the computer screen and the recording of responses by pressing keys on the computer keyboard were control ed by specific software. In Experiment 1, subjects were first exposed to contextual control training over twelve conditional discriminations, six AB, and six Be relations. Subjects were then exposed to contextual control tests over derived conditional relations. Following, training (XY, XZ) and testing (ZY. YZ, ZX, YX) of simple conditional relations took place. The experiment ended with tests of transference of contextual stimulus control. In Experiment 2, subjects were exposed to training and testing of contextual control after simple conditional discriminations training and testing. Seven subjects showed positive results in the tests, and six showed delayed emergence of tested relations. AII subjects showed immediate emergence of simple conditional relations as well as transfer of contextual control between equivelent stimuli. The results suggested that previous exposure to the training and testing of simple conditional discrimination could be regarded as an efficient condition to produce the emergence of consistent contextual control over equivalence classes. However the emergence of behavioral repertories that may be described by analytical unit of five terms were attained independently of the order of exposure as used in Experiments 1 and 2.No presente estudo avaliou-se a eficiência da ordem de exposíçâo a diferentes tipos de discriminaçâo condicional na emergência do controle contextual sobre a composiçâo de classes de estimulos equivalentes, bem como na transferência desta funçâo de controle entre estímulos equivalentes. Dois experimentos foram efetuados com quatro universitários em cada um. Um software exibia os estímulos na tela de um monitor e registrava as respostas de escolha emitidas no teclado. No Experimento 1, ocurreu o treino do controle contextual, seguido pelo teste da emergência  desta modalidade de controle sobre as relaçōes condicionáis derivadas. Em seguida, foram treinadas relaçōes condicionais simples, com teste posterior das relaçōes emergentes. Por fim, avaliou-se a transferência  do controle contextual entre estímulos equivalentes. No Experimento 2, o treino e o teste das relaçōes condicionáis simples precederam aos treinos e testes do controle contextual. No total. sete sujeitos evidenciaram resultados positivos nos testes do controle contextual sobre as relaçōes  condicionáis, sendo que seis atestaram a emergência  atrasada das relaçōes testadas. Todos registraram emergência  imediata das relaçōes condicionais simples e da transferência  da funçâo  de controle contextual entre estímulos equivalentes. Os resultados sugerem que a exposiçâo prévia aos treinos e testes de relaçōes condicionais simples constituiu-se em recurso eficiente para obrençâo  da emergência  do controle contextual consistente como o previsto sobre a composiçâo das classes de estímulos equivalentes. Contodo, a emergência  de repertórios passíveis de descriçâo pela unidede de análise de cinco termos foi registrada de modo homogéneo independente da ordem de exposiçâo aos tremas.