1. In a related-samples design, participant's behaviour is

A) measured once following exposure to some experimental condition.

B) measured on two different variables. For example, on an IQ test and as a reaction time following exposure to a stimulus.

C) measured only once as a baseline is assumed

D) measured at baseline (time 1) and then may be measured again over 2 or more times following each treatment.

2. Under the random sampling model of hypothesis testing for a related samples design, one assumption that the researcher has direct control over is

A) If it is a study involving humans, then the sample has been created by true simple random sampling from the population.

B) data are scores.

C) The distribution of scores in the sample is not skewed

D) The dependent variable (of difference scores) is normally distributed in the population.

3. The value for _D in a related samples design for a theoretical population is

A) estimated by the mean of the before sample.

B) estimated by the mean of the sampling distribution of mean difference scores.

C) the average of the sampling distribution of difference scores between 2 related samples.

D) the average of the population of difference scores between 2 related samples.

E) the same as the value for the mean of the before sample.