David is excitable, impulsive, and very active. He also has great difficulty concentrating. He MOST likely has _____.

A. mental retardation
B. a sensory deficit
C. attention-deficit/hyperactivity disorder
D. childhood schizophrenia

Ans: C. attention-deficit/hyperactivity disorder

Psychology

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The incidence of smoking is increasing worldwide but decreasing in North America

Indicate whether this statement is true or false.

Psychology

Cattell believed _____ was the major formative period for personality development

a. infancy c. young adulthood b. adolescence d. middle life

Psychology