For a fixed number of subjects, the independent t-test's power is less with equal sample sizes than with unequal sample sizes, ceteris paribus.

A student notices that the warmer it is in the classroom, the lower the average score on quizzes. This is an illustration of

A) systematic observation. B) a negative correlation. C) an experiment. D) a positive correlation.

A psychologist has just finished analyzing a client who is believed to have a conversion disorder. The psychologist asks the family to meet with him as part of the process of planning treatment

The psychologist is especially concerned about what he calls secondary gain. When one of the family members asks for an explanation, what will the psychologist say? a) "Clients with this disorder tend to develop a second disorder after the first is treated. " b) "The client is attempting to control the family's interaction patterns by producing the symptoms." c) "The family's attention and affection can actually have the effect of reinforcing the symptoms." d) "The symptoms exhibited by the client are actually related to a second and previously undiagnosed disorder."