5 - Chapter 5 Human Development Genes and Behavior Genetic...

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Chapter 5 Human Development
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Genes and Behavior Genetic factors influence many aspects of psychology Know this from: Twin studies Genetic research Let’s start with the newborn…
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Behavioral Capacities of the Newborn Little muscle control greatest purposeful movement with their eyes and mouths Development proceeds from the head and midline babies can move their ______ limbs then fingers
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Behavioral Capacities of the Newborn Newborns’ vision Poor, but better than we used to believe See contrast Hairlines Color vision poor Bright toys are for the parents! Optimal distance 8-15 inches
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Figure 5.14 Infants pay more attention to faces than to other patterns. These results suggest that infants are born with certain visual preferences. (Based on Fantz, 1963)
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Behavioral Capacities of the Newborn Newborns’ hearing infants suck more vigorously when they hear stimulating sounds human voice is stimulating Eventually the infant becomes __________ Playing new sounds will increase responding
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Behavioral Capacities of the Newborn Newborns’ learning and memory Infants as young as ______________ can discriminate between phonemes preference for their mother’s voice over another woman’s voice showed this preference on the day of their birth
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After repeatedly hearing a ba sound, the infant’s sucking habituates. When a new sound, pa, follows, the sucking rate increases.(Based on results of Eimas, Siqueland, Juscyk, & Vigorito, 1971)
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Behavioral Capacities of the Newborn Newborns’ learning and memory Older infants (2-3 months old) show ability to learn responses and remember them for days afterwards, such as kicking their legs to make a mobile move. Nine-month-olds can learn to press a lever to move a toy train around a track, and can retain this memory for a fairly long time.
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A cross-sectional study compares groups of individuals of different ages simultaneously A longitudinal study A sequential design combines cross-sectional and longitudinal studies, studying groups of people of different ages at multiple points in each group’s lifespan Research Designs for Studying Development
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Table 5.1 Cross-sectional and longitudinal studies
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Research Designs for Studying Development Problems in developmental research Selective attrition increased probability of some kinds of subjects dropping out Parent SES Cohort effects groups of contemporaries all have the same experience, knowledge or behaviors Grandparents college?
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Concept Check: Follow-up of a 10-year-long study of a group of adults with infant children who agreed to take parenting classes and job training in exchange for public assistance until gaining employment shows high overall levels of satisfaction.
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Piaget believed that the effect of any experience on a person’s knowledge or thinking depended on the
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This note was uploaded on 10/30/2008 for the course PSY 200 taught by Professor Craig during the Spring '08 term at N.C. State.

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5 - Chapter 5 Human Development Genes and Behavior Genetic...

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