The number of individuals who participated in the entire experiment was 80.
In the question, we are informed that an Independent group experiment or between-subjects experiment comparing four treatment conditions produces 20 scores in each treatment condition.
We are asked to find the number of individuals who participated in the entire experiment.
The number of treatment conditions in the experiment is given to be 4.
The scores in each treatment condition for the experiment is given to be 20.
The total number of individuals who participated in the experiment will be the product of the number of treatment conditions in the experiment and the scores in each treatment condition for the experiment.
Thus, the number of individuals who participated in the entire experiment = 4*20 = 80.
Thus, the number of individuals who participated in the entire experiment was 80.
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