A medical researcher conducted an experiment to determine whether smiling therap

Question

A medical researcher conducted an experiment to determine whether smiling therapy or talking therapy affected happiness. He measured three person's happiness and then each person was smiled at, and their happiness was measured again. Finally, each person was talked to, and yet again, had their happiness measured. What kind of experimental design is this? What kind of experimental design is this? Fractional factorial repeated error design 2 times 3 factorial One-factor 3 level between subject design One-factor 3 level within subject design

Explanation / Answer

What kind of experimental design is this?

d). one factor 3 level within subject design.

A within-subjects design is an experiment in which the same group of subjects serves in more than one treatment.

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