1 One of psychologys better known findings is that performan

1. One of psychology’s better known findings is that performance is good at moderate levels of arousal and poor at both high and low levels of arousal. Which of the following is true?

A. the strength of this relationship can be measured with Pearson’s r

B. this is an example of a positive linear correlation

C. this is an example of a negative linear correlation

D. a Pearson’s r for this relationship would be close to zero

2. An experimental design that has the same interpretation problem as a correlational study is

A. a repeated-measures design

B. a mixed design

C. a PxE factorial design

D. an independent groups design

3. Comparing K.ABC performance to performance on the Iowa Tests of Basic Skills enables a researcher to evaluate

A. the split-half reliability of the K.ABC

B. the criterion validity of the K.ABC

C. the test-retest reliability of the K.ABC

D. the amount of measurement error to be found in the K.ABC

Solution

1. One of psychology’s better known findings is that performance is good at moderate levels of arousal and poor at both high and low levels of arousal. Which of the following is true?

A. the strength of this relationship can be measured with Pearson’s r

that is the true statement because we are not very sure with only that information that is a positive, negative or close to 0

2. An experimental design that has the same interpretation problem as a correlational study is

A. a repeated-measures design

Comparing K.ABC performance to performance on the Iowa Tests of Basic Skills enables a researcher to evaluate

B. the criterion validity of the K.ABC