The Quantitative Index of the Direction and Magnitude of a Predictive

question 72

Multiple Choice

The quantitative index of the direction and magnitude of a predictive relationship is called a

• A)convergent validity.
• B)correlation coefficient.
• C)contingency variable.
• D)discriminant statistic.

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Definitions:

Delayed Circadian Phase

A shift in the sleep–wake pattern in which adolescents tend to stay up later at night than they did as children and then sleep later in the morning.

Circadian Rhythm

The natural internal process that regulates the sleep-wake cycle and repeats roughly every 24 hours.

NREM Sleep

Non-rapid eye movement sleep, which is a restorative sleep phase that includes deeper, more restful stages of sleep compared to REM sleep.

Kisspeptin

A small protein that is produced by specialized cells in the hypothalamus and plays a key role in the activation of the HPG axis.