Which of the following studies used a single-factor, matched groups design?
A) Kroeger et al.'s study, which evaluated the effects of a social skills program for autism
B) the study by Kasser and Sheldon, which compared groups writing two kinds of essays
C) Lee and Aronson's study comparing the effects of having a room move forward or backward
D) the study by McDonald and Flanagan, which examined the effects of traumatic brain injury

Question

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Kroeger et al.'s study used a single-factor, matched groups design by evaluating the effects of a social skills program for autism, where participants were matched on certain characteristics before being assigned to groups.

Which of the Following Studies Used a Single-Factor, Matched Groups