According to present research on psychologists, thirty-four percent are in the ________ subfield of psychology

Which situation is an example of longitudinal research?

A) A researcher compares how many different age groups perform on a memory test. B) A researcher compares how the same group of people, at different ages, perform on a memory test. C) An investigator compares the performance of an experimental group and a control group of participants on a memory test. D) A researcher compares the performance of several different age groups on a test of memory as each group is tested repeatedly over a period of years.

The validity of a personality inventory refers to

a. the ability of the inventory to separate those with good personalities from those with bad personalities. b. the level to which the inventory is able to label people as suffering from a psychiatric disease. c. the degree to which the scores for each trait correlate with the corresponding aspect of the person's actual behaviors. d. the degree to which the scores produced by one inventory agree with the scores produced on another inventory.