Question

Schaie's cross-sequential research on intellectual development demonstrated that _____. there is a decline in most abilities after age 30 cohort differences make it appear that older people are more intelligent than younger people women are smarter than men intellectual ability is usually maintained throughout adulthood

Answer 1

The research demonstrated that individuals improve most mental abilities during adulthood and then experience a gradual decline.
After people surpassing the mid-age, regeneration of the brain cells will also start to decline, which resulted in the impairment of cognitive ability that played a crucial role in our analytic ability.