________ is a tool that allows researchers to synthesize the results of many studies to estimate relations between variables

Luciano failed his last geology test. As he discusses the test with you, he says: "It's totally my fault. I was born stupid. I'll probably fail all my courses.". In this case, Luciano has made:

a. an external, stable, global attribution for his test performance b. an internal, stable, global attribution for his test performance c. an internal, unstable, specific attribution for his test performance d. an internal, stable, specific attribution for his test performance

The effect size for the data from an independent-measures t test can be measured by r2. Which of the following also produces the value for r2?

A) ?squaring the Spearman correlation for the same data B) ?squaring the point-biserial correlation for the same data C) ?squaring the Pearson correlation for the same data D) ?taking the square root of the Pearson correlation