When Sami tried to shape her pet squirrel's behavior to fetch marbles in the backyard, things proceeded quite smoothly at first. As time passed, however, the squirrel started burying the marbles rather than bringing them to her. This is an example of:

Menopause and other normative changes, such as graduating from college, contribute to _________ changes in traits?

a) mean-level b) marginal Consider This: Certain milestones may lead to general changes. LO 8.1: Explain the trait theory of personality stability during adult years c) five-factor Consider This: Certain milestones may lead to general changes. LO 8.1: Explain the trait theory of personality stability during adult years d) differential continuity Consider This: Certain milestones may lead to general changes. LO 8.1: Explain the trait theory of personality stability during adult years

In the National Social Life, Health, and Aging Project, which surveyed more than 3,000 U.S. 57- to 85-year-olds, more than half of the oldest respondents with an intimate partner

A) reported an increase in frequency of sexual activity in late adulthood. B) assigned little to no importance to sexual activity. C) reported engaging in little or no sexual activity over the previous year. D) reported engaging in sexual activity at least two or three times per month.