In a study of the effects of presentation rate on memory, group A gets a 10-item

Question

In a study of the effects of presentation rate on memory, group A gets a 10-item list that is presented at 10 sec/item, while group B gets the same list, presented at 20 items/sec. The average score is 9.8 for group A and 9.9 for group B, and the difference is not significant. What would you conclude from this study?

b. there is an external validty probelm- subjects are obviously professional memory experts and the results won't generalize

c. there has probably been a floor effect

d. the study almost certainly lacks statistical conclusion validity

Explanation / Answer

The correct answer is Option A. The results of the study indicate that there has probably been a ceiling effect.

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