Twin Studies

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A-Level Psychology (Biological) Flashcards on Twin Studies, created by alicefindlay97 on 25/04/2015.
alicefindlay97
Flashcards by alicefindlay97, updated more than 1 year ago
alicefindlay97
Created by alicefindlay97 over 9 years ago
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Question Answer
Identical twins are referred to as what? Monozygotic (MZ)
Non identical twins are referred to as what? Dizygotic (DZ)
What % of genes are shared by MZ twins? 100%
What % of genes are shared by DZ twins? 50%
Define a twin study Using correlation research to establish a genetic argument for the origin of human behaviour.
Would 2 MZ or 2 DZ twins who've been reared together be more similar according to the bioloigcal approach. Why? 2 MZ because they share 100% of their genes.
If a characteristic were entirely a product of our genes what would we expect from MZ twins? That both would always share this characteristic. This is NOT the case.
Give a strength of twin studies (applicability) There's lots of data in support of biological roots of disorders which as helped psychologists prevent stress for those vulnerable.
Give a weakness of twin studies (2 measurable) It's hard to isolate whether it's nature or nurture. 1. twins might have experienced a similar environment during separation. 2. Rarely separated at birth so often spent some time together.
Give a weakness of twin studies (MZ vs DZ) Adults tend to treat MZs more similarly as they look more alike. This may lead to their similarity rather than genes.
Define a twin study in simple terms Comparing specific characteristics of identical/non-identical twins.
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