By 200,000 years ago, the early hominid species had evolved into our species: ______
a. Homo sapiens
b. Hydro sapiens
c. Poly sapiens
d. Hetero sapiens
Answer: A
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A sample of n = 4 scores has a mean of M = 8 . If one new score with a value of X = 3 is added to the sample, what will be the value for the new mean?
a. M = 7 b. M = 8 c. M = 8.75 d. Cannot be determined with the information provided
Differential history effects are a threat to internal validity for which of the following designs?
a. differential research design b. one-group pretest–posttest design c. pretest-posttest nonequivalent control group design d. longitudinal design
If you make yourself smile while reading your psychology textbook, research on the facial feedback hypothesis predicts that you will probably ____
a. ?begin to feel embarrassed b. ?have more negative feelings about psychology c. ?have more positive feelings about psychology d. ?not experience any change in your feelings about psychology
In which of the following types of self-esteem do women generally score higher than men?
a) physical appearance b) athleticism c) self-satisfaction d) moral and ethical