When you choose to use directional hypothesis, such as "The posttest scores on the scale for depression will be less than the pretest scores on depression," you have reason to predict the outcome of your intervention in reducing depression.

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Directional hypothesis allows researchers to make predictions about the expected outcome of their intervention or experiment. In the given example, the prediction is that posttest scores will be less than pretest scores, indicating a reduction in depression.

When You Choose to Use Directional Hypothesis, Such as "The