Only About __________ Percent of Low-IQ Youngsters Are Profoundly Retarded

question 100

Short Answer

Only about __________ percent of low-IQ youngsters are profoundly retarded.

---

Definitions:

Circadian Rhythms

Internal biological clocks that regulate various physiological processes and behaviors on approximately a 24-hour cycle, including the sleep-wake cycle.

Seasonal Affective Disorder

A type of depression that occurs at a specific time of year, usually during winter, when there is less natural sunlight.

Cyclothymic Disorder

A mental disorder characterized by mood swings that are less severe than those in bipolar disorder.

Irritable

a state of increased sensitivity and easily becoming annoyed or upset.