Psychology 3225A/B Chapter Notes - Chapter 5: Sociobiology, Primate

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Lec tu re 5 sex d iffe re nc es in hum an ne onatal s oc ia l perc eption. 102 human neonates were tested to see id there was a difference in looking time at a face (social object) and a mobile (physical-mechanical object) Results: male infants showed a stronger interest in the physical mechanical mobile and female infants showed a stronger interest in the face. Sex differences are in part biological in origin. Female superiority in sociability is seen in humans: more eye contact than males, greater social understanding, and sensitivity to emotional expressions. Sexual dimorphisms in sociability are biological to some extent o o o. Amount of eye contact by infants 12 months of age is inversely relates to prenatal testosterone. Children with autism show reduced attention to people"s eyes and faces. Individuals with turner"s syndrome who inherit a paternal x chromosome are more social than those who inherit a maternal x chromosome.

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