The procedure used to ensure that research participants have an equal chance of being placed in the experimental or control groups in an experiment is called

Stanley takes LSD. As a result he may experience which of the following effects?

A) wakefulness, alertness, and shortened reaction time B) reduced anxiety and tension, and sedation C) a mixture of stimulant and narcotic effects D) powerful emotions and perceptual distortions

Failure to thrive

a. is an organic illness. b. is apt to be created by a combination of organic and non-organic causes. c. is a non-organic problem. d. is caused by prenatal problems.