The Pearson Product-Moment Correlation Coefficient (r)can be used to measure interobserver reliability when
A) the behavioral data have been measured on at least an interval scale.
B) the behavioral data have been measured on a nominal or ordinal scale.
C) only one observer recorded observations.
D) agreement between observers is expected to be low.

Question

Quizplus · Accepted Answer

The Pearson Product-Moment Correlation Coefficient (r) can only be used to measure interobserver reliability when the behavioral data have been measured on at least an interval scale. It cannot be used with nominal or ordinal scales as they do not provide enough information for calculating the correlation.

The Pearson Product-Moment Correlation Coefficient (R)can Be Used to Measure