In the classic study by McGraw (1935) on the twins Johnny and Jimmy, it was found that Johnny skated at less than 1 year of age but Jimmy, who was not introduced to skating until almost a year later, never succeeded in this task
McGraw posited that Johnny's ability in skating was a function of
A. greater readiness
B. greater recklessness
C. lower center of gravity
D. practice
C
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One researcher, Males (2009, 2010), has suggested that the brain development hypothesis that is often used to explain the transition to adulthood in young adults is wrong. Instead, Males argues that ____ is a stronger predictor of risky behavior than neurological changes
a. sexual activity or inactivity b. endocrine functioning c. poverty d. sex
To how many basic tastes can people respond?
A. three B. five C. seven D. nine
Jason has spent most of his adolescence in juvenile facilities because of his constant, severe physical aggression and violent crime. Based on this history, it is most likely that Jason has
A. a normal genotype. B. a 47,XYY genotype. C. androgen insensitivity syndrome. D. Klinefelter syndrome.
When it comes to patterns of substance abuse:
a. overall levels of drinking and smoking cigarettes are down from past decades. b. overall levels of marijuana use are higher than cigarette use. c. prescription drug abuse is on the rise. d. all of the above.