State whether the investigator used independent samples, reported measures, or matched samples:

A. An investigator wants to know if elementary-age children who have experienced the death of a parent are helped by a counseling group consisting of other children who have experienced a death in the family. He randomly selects children for this special counseling group, comparing their emotional adjustment at the beginning of treatment with their emotional adjustment following a year of the specialized group counseling.

B. An investigator wants to know if elementary-age children who have experienced the death of a parent are better helped by counseling group consisting only of other children who have experienced a death in the family or by a counseling group consisting of children demonstrating a wide range of behavioral and emotional issues. He randomly assigns children to the two groups and compares each group's emotional adjustment following a year of group counseling.

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A An investigator wants to know if elementaryage children who have experienced the death of a parent are helped by a counseling group consisting of ot... View the full answer