The practical significance of an effect
A) is directly proportional to the size of the effect: larger effects have more practical significance than smaller effects.
B) is inversely proportional to the p-value of the statistical test of the effect: smaller p-values indicate greater practical significance.
C) depends on how effect is going to be used: the same effect can have more or less practical significance depending on its intended use.
D) is usually not an important issue in psychological research.

Question

Quizplus · Accepted Answer

The practical significance of an effect depends on how it will be used. For example, a small effect size may have practical significance in a clinical setting where it can still make a real difference in patient outcomes, whereas the same effect size may not have practical significance in a workplace setting where it may not have a noticeable impact on overall productivity or profits. Therefore, option C is the correct answer. Options A and B are incorrect because the practical significance of an effect is not solely determined by effect size or p-value, respectively. Option D is incorrect because practical significance is, in fact, an important issue in psychological research.

The Practical Significance of an Effect