Card 86 / 153: A researcher takes a group of clients and gives them a depression inventory. He then provides each client with two sessions of brief solution-oriented therapy and gives them the same depression inventory. A t test is used to compare the two sets of scores on the same people (i.e., the before and after measures of depression). This would be
A) a between-groups design
B) a correlation coeffi cient.
C) a related measures within-subject design.
D) survey research

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