In the U.S., 20 ounces of a beverage that is 25% alcohol contains __________ ounces of alcohol

Which one of the following is the most commonly diagnosed childhood behavior disorder?

a. Depression b. Autism c. Childhood-onset conduct disorder d. Attention-deficit hyperactivity disorder

When secondary variance is allowed to occur in experimental research,

a. the design is assumed to have internal validity b. the design is assumed to have external validity c. the design is assumed to be tightly controlled d. the design is assumed to be "flawed"