Oxygen deprivation at the time of birth is a known risk factor for

When Schaie tested adult intelligence using a cross-sequential research design, he found

a gain until the late 50s in all but one ability. moderately large decrements in all areas from age 40 to age 50. stability until the mid-30s and decline thereafter. that beyond age 60, only some abilities decrease.

A score on the Social Readjustment Rating Scale represents the sum total of recent

a. hassles. b. social events. c. overall arousal. d. change difficulty. e. life-change units.