A measure of temperament yields different results across different ages, observers, and situations.The measure is said to have low:

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Quizplus · Accepted Answer

The measure is said to have low reliability because it yields different results across different ages, observers, and situations, which means it is not consistent or dependable in measuring temperament. Accuracy refers to the degree to which the measure reflects the true aspect of the construct being measured, longitudinality refers to the ability of the measure to capture changes over time, and validity refers to the degree to which the measure assesses what it claims to measure. While these factors could also be impacted by the inconsistencies described, the best selection is reliability.

A Measure of Temperament Yields Different Results Across Different Ages