The best predictor of whether someone will achieve fluency in a second language is

One potential problem with deviation IQ scores is that research suggests that IQ scores are rising with each successive generation. This is called the __________ effect

Answer:

Why is the perception of possible risk or danger associated with drug use considered to be a meaningful index for predicting future trends in drug use?

a) Because changes in perception of drug use often precede changes in drug use behavior b) Because the perception of risk for drug use is often the only survey question that researchers believe people answer honestly. c) Because changes in perceptions of drug risks and danger have been shown to be 100 percent accurate predictors of future drug use behavior. d) Because studies show that as parents' perception of marijuana use as risky or dangerous increased, marijuana use among adolescents also increased.