When psychologists viewed home movies of infants and children who subsequently developed schizophrenia, what did they find?
A) nothing unusual
B) all of the symptoms associated with schizophrenia
C) evidence for a "splitting" of personality
D) unusual motor patterns such as jerky, repeated, and unnecessary arm movements
Answer: D
Rationale: When psychologists viewed home movies of infants and children who subsequently developed schizophrenia, they noted that these children showed some unusual motor patterns, primarily on the left side of the body, such as jerky, repeated, and unnecessary arm movements. Siblings who did not have schizophrenia did not show these same motor patterns.
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