Which of the following is a requirement for a random sample?
a. Every individual has an equal chance of being selected.
b. The probabilities cannot change during a series of selections.
c. There must be sampling with replacement.
d. All of the other 3 choices are correct.
D
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When Zhao was 5 years old, there was a thunderstorm one night. While Zhao watched the "pretty" lightning in the sky, the storm sirens near his house went off and scared him. As an adult, he is still terrified of thunderstorms. Based on classical conditioning principles, a behavioral therapist would suggest the fear that Zhao feels during thunderstorms is:
a. an unconditioned stimulus b. an unconditioned response c. a conditioned response d. a conditioned stimulus
In their explanation of apparent movement, Wundt and Helmholtz emphasized ____, though their descriptions were different.?
a. ?learning b. ?genetics c. ?innate ideas d. ?psychophysical isomorphism
In which of the following circumstances is context most likely to affect the perception of pain?
A. finishing a triathlon B. falling off a horse C. breaking a leg skiing D. tripping while skateboarding