The Moro startle reflex is concerned with:

Behavioral therapists base their explanations and treatments of mental abnormality on principles of:

a.) relationships. b.) ego development. c.) dream analysis. d.) learning.

A score on an intelligence test with a percentile rank of .30 indicates that

A) The score is two standard deviations above the mean. B) The score is two standard deviations below the mean. C) 30% of the population has lower scores. D) 30% of the population has higher scores.