If you wanted to compare the personality of one country versus another, why is it necessary to get a representative sample of the whole country?
a. Population density varies from one part of the country to another.
b. All people should think they had an equal chance to participate in the study.
c. Personality varies, on average, from one part of the country to another.
d. Research grants require researchers to treat all areas of the country equally.
c
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______ are chemicals that retard behavior by either speeding up or slowing down nerve impulses
a. Hallucinogens c. Depressants b. Opiates d. Stimulants
When solving basic addition problems, 5-year-old Sid sometimes counts on his fingers, sometimes starts with the lowest digit, or sometimes starts with the highest digit. According to Siegler's model of strategy choice,
A) Sid has problems with cognitive self-regulation. B) Sid has a control deficiency. C) Sid is not yet skilled at cognitive inhibition. D) Sid's variability in strategy use is adaptive.