A researcher is measuring the heart rate of subjects as an index of anxiety. In this study, heart rate is
a. a confounded variable.
b. negatively correlated with anxiety.
c. an independent variable.
d. an operational definition of anxiety.
D
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Which is true regarding common gender stereotypes?
a. There is solid research evidence that females generally have better visual/spatial skills than males. b. There is consistent research support for the fact that males are more aggressive than females. c. Females are more vulnerable to diseases and disorders than males. d. There are no gender stereotypes that are consistently supported by research.
The most powerful research method is the:
a. correlational method b. quasi-experimental method c. archival method d. experimental method
What can we conclude when the absolute value of a z-score for a sample mean is larger than the critical value?
a. The random selection procedure was conducted improperly. b. The sample mean is reasonably likely to have come from the given population by random sampling. c. The sample mean represents the particular raw score population on which the sampling distribution is based. d. The sample mean does not represent the particular raw score population on which the sampling distribution is based.
When a neuron's membrane is at rest, the concentration gradient tends to move potassium ____ the cell and the electrical gradient tends to move it ____ the cell.
A. into; into B. into; out of C. out of; into D. out of; out of