Os efeitos de diferentes condições de privação sobre a variabilidade comportamental

• Autor(a) principal: Souza, Mariana Ribeiro de
• Data de Publicação: 2007
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da PUC_SP
• Texto Completo: https://tede2.pucsp.br/handle/handle/16795
• topic: Privação de alimento; Variabilidade comportamental; Avaliacao de comportamento; Privacao (Psicologia); Behavioral variability; Deprivation of food; CNPQ::CIENCIAS HUMANAS::PSICOLOGIA::PSICOLOGIA EXPERIMENTAL

This thesis is an inquiry into the relation between different conditions of deprivation of food and behavioral variability observed by means of three different procedures: a) differential reinforcement of duration of response of pressing a lever, under the schedule Lag 6 variability group; b) reinforcement of responses of pressing lever, whose respective durations are comprised within the duration band of 6.0 to 7.20 seconds stereotypy group; and c) activities available in an experimental box, without reinforcements. Two questions directed the conduct in this inquiry: (1) does the condition of deprivation change the distribution of responses within the classes of responses? (2) which is the direction of such change? The subjects of the experiment were eight mail rats deprived of food. Different conditions of deprivation were manipulated inter-subjects, by means of controlling the amount of food ingested: high deprivation, intermediary deprivation, low deprivation, and no deprivation. Two different experimental boxes were used: a box with lever and food dispenser, and a box with seven chambers for different activities, like drinking water, wood-chewing, running a wheel. Results showed that there was a difference in variability depending on the condition of deprivation applied. Results concerning effects of one same condition of deprivation on the distribution of responses among classes, in the group stereotypy, did not show any regularity in variation of responses between classes, as compared to variation of performance between subjects. In the case of two particular subjects, of the stereotypy group, the distribution of responses in the classes was greater than under conditions of low deprivation and ad lib. However, for one subject in the group, the distribution of responses was altered in the opposite direction: under high deprivation, the distribution of responses in the classes was lower when compared to the distributions of responses in classes under low conditions of deprivation and ad lib. For all subjects in the variability group, the distribution of responses in the classes increased together with change in the condition of low deprivation and in the ad lib condition. Under high deprivation, the distributions of responses in the classes showed a concentration in the classes of low durations. Results concerning effects of conditions of activity of subjects were discussed in terms of the number of turns in the wheel of activities, when each condition of deprivation was present. Results suggest that the number of turns in the wheel seems to change both in relation to the condition of deprivation prevalent and to the continued exposition to the opportunity of treading in the wheel