According to Piaget's preoperational stage of cognitive development, centration is the tendency to focus on a single aspect of a problem

A research report states "t(8) = 2.00, p> .05.". For this test, r2= 2/10

Indicate whether the statement is true or false

You have just memorized a great deal of information for an upcoming art history exam. According to researchers, which of these suggestions will help you retain that information?

A. Do not study too hard, or your memories will become persistent. B. Do aerobic exercise three times a week to improve alertness. C. Avoid watching television for 24 hours before the exam. D. Get a good night's sleep before the exam.