The most frequently abused of all substances is __________

Studies using difference scores tend to have larger effect sizes than studies using other research designs because

A) of the long-standing procedural bias in psychology to set up studies involving dependent means in such a way as to artificially favor large effect sizes. B) the standard deviation of difference scores is usually low. C) participants provide their own baseline, which increases the variance. D) studies with dependent means usually use a larger number of participants, so larger effect sizes are easily detected.

To find the standardized regression coefficient for the best linear prediction rule, divide the square root of __________ by the square root of __________, and multiply the result by the unstandardized (ordinary) regression coefficient

(Give numbers.) Fill in the blanks with correct word