CAS PS 241 Lecture Notes - Lecture 22: Twin Study, John Bowlby, Behavioural Genetics
7 Dec 2018
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Document Summary
Behavioral genetics research can inflate heritability in twin studies. Sibling interaction models can correct for this. Raises serious questions about the validity of parent ratings. Objective measures: actigraphs (48 hours), observed shyness. Contrasting when parents compare children to other children (contrasting bias) Contrast effects probably contribute to the low correlations found between parent and observer ratings. Siblings research: links differences on parent-related temperament and outcome may reflect parent perceptions rather than actual child behavior. Sibling research: links difference on parent-related temperament and outcome may reflect parent perceptions rather than actual child behavior. Psychoanalytic: babies become attached due to innate drive for oral stimulation. Learning: drive reduction view parents provide with food, reduction of sucking drive. Cognitive theory: before attachments can form, babies must differentiate between strangers and family. Ethological: adaptive significance of behavior, innate predisposition for attachment innate survival value. Lorenz: preference for first moving object with critical period (ducks and imprinting) High mortality in orphanage (psychological, emotional wasting)
