Heston Evaluation


	Heston Evaluation
	Advantages Inter-rater reliability makes the study valid. Two groups were matched which makes the study consider individual differences. All children were adopted at birth which means that there were no confounding variables, making the study more valid.	Disadvantages All American participants makes the study more generalisable. Most people are not adopted which makes the study less representative. Children normally go to similar families which means that there are confounding variables affecting the validity.
	Evaluation

Inter-rater reliability makes the study valid.
Two groups were matched which makes the study consider individual differences.
All children were adopted at birth which means that there were no confounding variables, making the study more valid.

All American participants makes the study more generalisable.
Most people are not adopted which makes the study less representative.
Children normally go to similar families which means that there are confounding variables affecting the validity.

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