Certified Personal Trainer (NSCA) Practice Exam

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If a skinfold body composition test yields the same results two days later, how is the test categorized?

Valid
Reliable
Normative
Criterion-referenced

The correct answer is: Reliable

When a skinfold body composition test produces the same results over a short period, it indicates that the test is reliable. Reliability refers to the consistency of a measure; in this context, it means that the test can produce the same results under similar conditions when repeated. A reliable test is essential in fitness assessments because it ensures that any changes in body composition can be attributed to actual changes rather than inconsistencies in testing procedures or measurements. Other categories such as valid, normative, and criterion-referenced pertain to different aspects of measurement. Validity focuses on whether the test accurately measures what it claims to measure, while normative refers to the standard benchmarks derived from populations to compare individual scores. Criterion-referenced relates to measuring performance against a standard, rather than comparing it to others. Hence, the consistency shown by yielding the same results in repeated tests categorizes it as reliable.