Ninth Edition CoverGraziano & Raulin
Research Methods (9th edition)

Answer for Exercise #5

Psychological measures like the ones described are usually thought to represent interval data and thus produce score data. We are looking for a measure of relationship between these measures. Therefore, we would compute Pearson product-moment correlations. Since we have four measures (a, b, c, & d), we would have six different correlations (ab, ac, ad, bc, bd, & cd) that form a half-matrix as shown below.

a

b

c

d

a

rab

rac

rad

b

rbc

rbd

c

rcd

d