In a study on the effects of exercise on stress, researchers predict simply that there will be a difference in stress levels between the exercise and no exercise groups. The researchers are using _____
a. a two-tailed hypothesis
b. a directional hypothesis
c. a one-tailed hypothesis
d. both directional and one-tailed hypotheses
a
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Scientific observation permits:
a.the study of individuals behaving as they normally do. b.determination of cause-and-effect relationships. c.precise control of the environment. d.systematic manipulation of variables.
Children who had been diagnosed with Failure to Thrive in infancy were smaller, less cognitively advanced, and more emotionally disturbed than other children
Indicate whether the statement is true or false
Good child care:
a. cannot sustain the benefits of growing up in an economically advantaged family.
b. improves children's intelligence test scores in all measures except cognitive and social skills.
c. is more readily available in the United States than in most European countries.
d. can reduce the negative impact of a stressed, poverty-stricken home life.
______ life changes can be stressful
a. Neither positive nor negative c. Only negative b. Only positive d. Both positive and negative