Calculating the effect size for a pretest posttest experiment gives what information to the experimenter. It tells the experimenter _____
a. the probability of a Type I error
b. how many standard deviation units separate the means of the pretest and posttest
c. the relative size of the variance of the pretest and posttest scores
d. both a and c
B
Effect size is a measure of the number of standard deviation units separating the means of the pretest and posttest.
You might also like to view...
Thomas tends to be so overly suspicious of people's motives that he appears to trust no one. Whenever someone compliments him, Thomas always thinks to himself that they are just "buttering him up for a favor.". Thomas fits the description of which personality disorder?
a. antisocial b. borderline c. paranoid d. narcissistic
Behavior that is intended to injure defines:
a. hostile aggression b. assertive behavior c. antisocial behavior d. instrumental aggression
Which of the following types of samples is considered most representative of any given population?
A) a random sample B) a convenience sample C) a snowball sample D) either a convenience sample or a snowball sample
According to the anxiety conservation hypothesis, avoidance responses persist because:
A) ?avoidance occurs too quickly for the shock to be felt. B) ?escape occurs too quickly for the fear to extinguish. C) ?avoidance occurs too quickly for the fear to extinguish. D) ?escape occurs too quickly for the shock to be felt.