Christian A. Gonzalez

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Effects of social stimuli on behavioral and physiological responses were examined in infant rhesus monkeys at 4 and 9 months of age. Infants and mothers were removed from the social group and housed as dyads. Following this period, infants were removed and separated under four counterbalanced conditions: (a) totally isolated--placed in a holding cage for 24(More)
Adult female squirrel monkeys were housed in a group, in pairs or individually. Plasma levels of cortisol obtained under basal and stress conditions once weekly for four weeks were significantly lower in pair-housed females than in those living in a social group or individually. The increment in cortisol levels after stress (induced by handling and ether(More)
Sixteen squirrel monkey mother and infant dyads were housed in groups of two. They were separated and then immediately reunited in their familiar home cage or in a novel environment, either in conjunction with the second mother-infant dyad, or as a single manipulated pair. Behavioral observations of both dyads were made during the 30-min period following(More)
Effects of social stimuli on behavioral and physiological responses to separation were examined in 4-month-old rhesus monkeys. Infants were removed from their social group under 3 counterbalanced conditions: (1) infant totally isolated from its familiar physical and social environment and placed alone in a cage for 4 days; (2) "mother in"--housing the(More)
Individual differences in cognitive flexibility may underlie a variety of different user behaviors, but a lack of effective measurement tools has limited the predictive and descriptive potential of cognitive flexibility in human-computer interaction applications. This study presents a new computerized measure of cognitive flexibility, and then provides(More)
A conditioned aversion to a novel milk solution was produced, and animals were then reexposed to milk while nondeprived (low conflict) or following a 72-hr food and water deprivation regimen (high conflict). No sex differences occurred if animals were nondeprived throughout testing. However, if deprived during the interval between conditioning and(More)