A Researcher Is Using a Repeated-Measures Design to Test for Mean

question 68

Multiple Choice

A researcher is using a repeated-measures design to test for mean differences among four treatment conditions.If the data for this study consist of 10 scores in each treatment,then how many subjects participated in the study?​

• A)​4
• B)​10
• C)​40
• D)​50

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Definitions:

Placebo Effect

The phenomenon that occurs in an experiment when a participant’s response to a treatment is due to his or her expectations about the treatment rather than to the treatment itself.

Sugar Pill

A placebo, often used in medical trials to test the efficacy of new drugs by comparing their effects to those of an inert pill.

Drowsy

A feeling of being sleepily tired and lethargic, not fully awake, often as a prelude to falling asleep.

Random Assignment

The process of selecting participants for experimental and control groups by using a chance procedure to guarantee that each participant has an equal probability of being assigned to any of the groups; a control for selection bias.