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CRIME




THEILGAARD ­ CRIMINAL GENE

AIM ­ to investigate whether there is a particular gene responsible for criminal behaviour

DESIGN

IV ­ two groups of chromosome patterns XXY or XYY
DV ­ criminal behaviour

PROCEDURE

Took blood samples from 30,000 men
Two abnormalities found XXY and XYY chromosome patterns
16…

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CRIME




EVALUATION

Strength Weakness
Social worker had no knowledge of the aim ­ Only one researcher so subjective
blind researcher so no biasness
Wide range of tests were used Only men ­ gender bias
Blood test objective Invasive ­ temporary pain
Not ethnocentric Blood tests in 1940s were not accurate…

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