________ studies tend to show more of a decline in intelligence across the lifespan than _______ studies.
A. longitudinal; cross-sectional
B. cross-sectional; longitudinal
Answer: B. cross-sectional; longitudinal
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Which of the following is not a step in establishing an optimal sleep pattern?
A. go to bed only when sleepy B. do not read in bed C. if you cannot sleep, stay in bed and focus on falling asleep D. set the alarm for the same time each morning
Research has shown that such characteristics such as height, memory span, and intelligence are
a. positively correlated. b. negatively correlated. c. distributed along a normal curve. d. none of these.
Which of the following is not contained in the results section?
a. statement of what happened b. interpretation of the outcome c. statements of statistical significance d. figures and tables
Suppose you interview a group of people who were 12th graders in 2009
If you believe they represent a "typical" population of people growing up in the United States at this time, you would expect that about ____ of these students would have had sexual intercourse. a. 15% b. 33% c. 50% d. 67%