The Kallikak family study conducted by Goddard was designed to prove that intellectual disability is an inherited trait that runs in families.

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The Kallikak family study, conducted by Henry H. Goddard in the early 20th century, aimed to demonstrate that intellectual disability was hereditary by tracing the lineage of a family with a history of intellectual disabilities.

The Kallikak Family Study Conducted by Goddard Was Designed to Prove