The numerator of the test statistic for a t test is ______.
A. the mean difference between groups
B. the mean variability due to error
C. the error variance
D. the significant difference
Answer: A
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Development that occurs in distinct steps or stages, with each stage bringing about behavior that is assumed to be qualitatively different from behavior at earlier stages. This is referred to as what type of change?
A. discontinuous B. continuous C. critical D. natural
Harvey takes the drug Viagra. How does the drug help produce erections for Harvey?
a. It removes blockages in blood vessels that serve Harvey's penis. b. It increases Harvey's sexual drive. c. It relaxes blood vessels in Harvey's penis, allowing them to expand. d. It triggers contractions of orgasmic muscles. e. It stimulates the release of Harvey's seminal fluid.
Chris is in counseling with a therapist who never gives advice or directions to him, but who often restates what Chris has said so that he can reflect on his feelings. What type of therapist is Chris seeing?
A. client-centered B. psychoanalytic C. cognitive D. behavioral
The closer an experiment is to arranging circumstances similar to those in the real world, the more psychologists can claim it has:
A) internal validity. B) external validity. C) reliability. D) statistical significance.