Although the Kallikak family study provides proof that criminality is more common in some families,subsequent studies have proven otherwise.

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The Kallikak family study, conducted by psychologist Henry H. Goddard, has been widely criticized for its methodological flaws and biased interpretation. Subsequent research has shown that criminal behavior cannot be attributed solely to heredity, as environmental factors play a significant role.

Although the Kallikak Family Study Provides Proof That Criminality Is