PSYC 107 Lecture Notes - Lecture 10: Preterm Birth, Birth Weight, Motor Coordination
15 May 2016
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Cross-sectional study=compares groups of individuals of diff. ages @ same. Longitudinal study=follows single group of individuals as they dev: takes yrs. to complete, not every1 who participates 1st time is willing and available later. Selective attrition=tendency for certain kinds of ppl to drop out of study: kind of ppl who stay differ in many ways than those who quit, psychologists compensate by discarding data for ppl who left. Sequential design=researcher stats w/ppl of diff. ages and studies them again. Cohort effects=ppl of diff. generations differ in many ways. Cohort=group of ppl born @ particular time/group of ppl who enter organization @ particular time. Era in which you grew up=powerful influence on psychological dev. 6 weeks after: brain produces few movements=spontaneous=not elicited by any stimulus: muscles and nerves controlling these movements mature b4 sense organs, essential for spinal cord properly dev. Dishabituation=when change in stimulus inc previously habituated response: monitoring this tells us if hear difference b/w 2 sounds.
