In an experiment, the behavior that is expected to be affected by some manipulation is called the ______ variable

How would you characterize Alan Baddeley's description of working memory?

a. It is a large storehouse of information, much like a huge university library. b. It is a solid, stable, industrious machine that systematically processes information. c. It is a highly active area in which information is being manipulated and changed. d. It is a movie screen, continuously registering a stream of complex, colorful images.

Which evidence best demonstrates an environmental impact on intelligence?

a. a high correlation between the IQ scores of identical twins b. a low correlation between the IQ scores of strangers c. the rapid increase in average WISC scores seen during the past 25 years d. the stability of WISC scores seen during the past 25 years