Which type of validity requires multiple research studies, usually conducted over a long period of time?

The capacity for voluntary, effortful management of emotions

A) improves as a result of the development of the prefrontal cortex. B) is present at birth. C) emerges suddenly around 8 to 10 months. D) cannot be modified by learned strategies.

In a multiple regression situation with two predictors, the correlation of the first predictor with the criterion is .13; the correlation of the second predictor variable with the criterion is .12

Because the two predictor variables are correlated with each other, the multiple correlation coefficient will be __________ .25. Fill in the blanks with correct word