Within Subjects Design

Question 1

Within Subjects design

Answer 1

a type of experimental design in which all participants are exposed to every treatment or condition

Question 2

Advantages of WSD

Answer 2

no worries about differences between groups, statistically more powerful because individual differences are controlled.

Question 3

Disadvantages of WSD

Answer 3

history effects, differential carry-over, practice/testing effects, maturation.

Question 4

Avoiding carryover and testing effects

Answer 4

control order effects between conditions.

Question 5

counterbalanced method

Answer 5

an equal number of subjects receive each order.

Question 6

random method

Answer 6

all subjects get conditions in a randomly shuffled order, common with the concurrent measures design.

Question 7

Best designs for situations

Answer 7

Individual differences - use within subjects because it controls for this.
Few participants - use within subjects because each person is in all conditions.
Time related effects or carry over effects - use between subjects because participants are only in one condition.

Question 8

Mixed designs

Answer 8

more than one IV, at least one of the IVs is between-subjects and at least one IV is within-subjects. Different participants get one of the levels of the 1st IV, SAME participants then experience both levels of the 2nd IV.