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What describes the most important physical changes of midlife in terms of the reproductive system as fertility declines in males and females?
Objective Tests
Tests that measure an individual's performance against a standard set of criteria or answers, minimizing subjective judgment.
Double-blind Tests
Experimental procedures in which neither the participants nor the experimenters know who is receiving a particular treatment, to prevent bias.
Single-blind Tests
Experimental designs in which the participants do not know which treatment or intervention they are receiving, but the experimenters do.
Hypothesis
A statement that attempts to predict or to account for a set of phenomena; scientific hypotheses specify relationships among events or variables and are empirically tested.
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