How long did the positive effect on cognitive functioning by way of playing Mozart last in a study conducted in the 1990s?

Caregivers diminish the independence of the elderly by

helping them too little. helping them too much. not helping them at all. ignoring their needs.

A statistical method that summarizes the results of a lot of studies on the same topic is termed a:

a) significance test. b) correlation coefficient. c) factor analysis. d) meta-analysis.