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Month: March 2021

Influences of Early Life Experiences on Behavior in Japanese Macaques: Modulation of Outcome by Genetic and Social Factors

Posted on March 23, 2021January 11, 2023 by MacBrain research team

A pair of small, affiliated studies that emerged from the study on the timing of maternal separation were conducted at the Oregon Health and Science University These studies investigated the role played by early experience in determining later behaviors, by examining the modulation of genetic and social influences on behavior in Japanese macaques.

One relevant early life experience in Japanese macaques is a decrease in maternal attention due to mating season or the birth of a new sibling. Factors that could influence individual differences in behavioral reaction to this experience include temperament, biological disposition (behavioral inhibition, growth hormone responsiveness) and social or environmental factors (dominance rank, social support, infant abuse). In humans, socio-economic status (SES) determines access to resources and influences vulnerability to some illnesses. One study examined whether the same may hold true for dominance rank and Japanese macaques.

The study examined whether temperament predicts response to the birth …

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NimStim Face Stimulus Set

Posted on March 13, 2021January 11, 2023 by MacBrain research team

The Research Network on Early Experience and Brain Development has developed a battery of 646 facial expression stimuli for use in its own and other studies of face and emotion recognition.

Images include the following expressions, displayed by a variety of models of various genders and races: fearful, happy, sad, angry, surprised, calm, neutral, disgusted.

We are in the process of getting validity ratings on these face stimuli. However, preliminary data indicate high agreement amongst children and adult raters (Tottenham, N., Borscheid, A., Ellertsen, K., Marcus, D.J., Nelson, C.A. (April, 2002). Categorization of Facial Expressions in Children and Adults: Establishing a Larger Stimulus Set. Poster presented at the Cognitive Neuroscience Society annual meeting, San Francisco). This site will be updated when more data are analyzed.

We are making these stimuli available to the public free of charge. We require registration and acceptance of our terms and conditions to use the …

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