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Psychology: Adoption studies - Coggle Diagram
Psychology: Adoption studies
Kendler et al (2015)
Method
Correlation study
Key words
Addictive
Twins
Adoption
Selective placement
What was it about?
An adaptioj study that demonstrates addictive influences where the researchers conducted a rigorously designed adoption study of a sample of sibling pairs in which one sibling was home-reared and the other one was adopted away.
Result
The findings suggest that cognitive ability is environmentally malleable: there was a five-point increase in IQ on the average age of 18.
Scarr and Weinberg (1983)
Method
Correlation study
Key words
Cognitive abilities
Intelligence
Transracial
Malleability
What was it abotut?
The study reported the result of two longitudinal studies launched in 1974, both of which investigated malleability of intelligence.
The Transracial Adoption study: designed to see if black children reared by white families performed on tests of IQ and the school achievement as well as the other adoptees.
The Adolescent Adoption study: The study looked at how differences in cognitive ability accumulate over years till adolescence.
Results
The results support the idea of addictive influence of genetics and the the environment to the development of IQ: Black children places in white families increased their IQ scores substantially as compared to black children reared in their own home.
Earlier adoption resulted in higher IQ scores than late adoption.