What is the major explanation offered to account for the differences in the pattern of IQ stability or decline over adulthood shown in cross-sectional versus longitudinal studies?

Which of the following is an example of what Piaget termed concrete operations?

A) Reversibility B) Abstract thinking C) Automaticity D) Centration

Your 83-year-old uncle has always been a very entertaining storyteller. In the past few years, he has been having difficulty remembering the names of people who are important for his stories. What difficulty is your uncle experiencing?

a. tip-of-the-tongue phenomenon b. Stroop phenomenon c. gotcha memory d. forgetful memory