A ________ policy involves an offer of reward to those who reduce their socially harmful behaviors

Not until __________ months do babies prefer a salty taste to plain water

A) 2 B) 4 C) 6 D) 8

Because of measurement error, the variability of test scores is _________ the

variability of true scores. a) the same as b) smaller than c) larger than d) 2/3 times the variability of true scores