Definitions: Chapter 13 and 14

Question 1

Related samples:

Answer 1

an expiremental design in which the same participant is observed under more then one treatment

• also known as repeated measures

Question 2

Matched samples:

Answer 2

an experimental design in which the participants are paired and one is assigned to each treatment

Question 3

Difference scores:

Answer 3

the set of scores representing between partcipants performance on two occasions:

Group1 Mean - Group 2 mean = differnece

Question 4

Order effect:

Answer 4

effect on performance attributable to the order in which treatments were admistered

Question 5

Carry over effect

Answer 5

the effect of previous trials (conditions) on a particpants performance in later trials

Question 6

Sampling distribution of differences between means?

Answer 6

the distribution of the differences between meanas over repeated sampling from the same populations.

Question 7

Variance sum law:

Answer 7

the rule giving the variance of the sum (or differnece) of two or more variables

Question 8

Homogenity of variance:

Answer 8

the situation in which two or more populations have equal variances

Question 9

Pooled variance:

Answer 9

a weighted average of seperate samples, used when the two sample sizes are different