Erection of the penis is first possible during:
A) adolescence. B) early childhood.
C) infancy. D) later childhood.
Answer: C
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When young adolescents are asked what they most dislike about themselves, ________ is mentioned more than anything else
a. emotional immaturity b. their social status c. physical appearance d. lack of confidence
Which of the following statements is the BEST example of a hypothesis about human development?
A) Cross-cultural studies have determined that human breast milk provides the ideal nutrition for infant brain development. B) Human breast milk contains nutrients that are essential for the formation of neurons and synapses in an infant's developing brain. C) Because human breast milk is a superior form of nutrition for infants, all newly-delivered women should be encouraged to breast feed their infants. D) If breast milk is a superior supplement for infant brain development, children who were breast-fed as infants should perform better on psychological tests than children who were not breast fed.
Which of the following activities is most fatiguing to elementary school children over longer periods of time?
A. running B. sitting C. jumping D. bicycling
Juanita, a researcher at a pharmaceutical company, is assessing the effects of an experimental drug on lever pressing behavior in laboratory rats. For this study, what type of variable is lever pressing?
a. Confound variable b. Experimental variable c. Independent variable d. Dependent variable