genetics- twin study evaluation


	genetics- twin study evaluation
	Advantages Twin studies can tell us whether important behaviours are heritable - which means they are passed down genetically from your parents rather than learned from your environment. Reliability. Because of fertility treatment and women having babies later in life, the number of multiple births is increasing. This increases the number of twins available for study, making it possible to conduct research with large samples, analyse data with more powerful statistical tests and making it easier for other psychologists to replicate studies. Validity. Twins are an example of a naturally-occurring variable being perfectly changed for study: MZ twins share 100% of their genes, DZ twins share about 50%. Because researchers are not manipulating this variable themselves, it reduces the risk of researcher bias.	Disadvantages Twins are rarely separated at birth and raised in a totally different environment, yet this is necessary to substantiate claims. MZ twins reared together share many of the same experiences. DZ twins reared together may not share the same experiences due to levels of attractiveness or temperament.
	Evaluation

Twin studies can tell us whether important behaviours are heritable - which means they are passed down genetically from your parents rather than learned from your environment.
Reliability. Because of fertility treatment and women having babies later in life, the number of multiple births is increasing. This increases the number of twins available for study, making it possible to conduct research with large samples, analyse data with more powerful statistical tests and making it easier for other psychologists to replicate studies.
Validity. Twins are an example of a naturally-occurring variable being perfectly changed for study: MZ twins share 100% of their genes, DZ twins share about 50%. Because researchers are not manipulating this variable themselves, it reduces the risk of researcher bias.

Twins are rarely separated at birth and raised in a totally different environment, yet this is necessary to substantiate claims. MZ twins reared together share many of the same experiences. DZ twins reared together may not share the same experiences due to levels of attractiveness or temperament.

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