The Results of a Predictive Validity Study of a Test

The results of a predictive validity study of a test will likely be affected most by

A) the characteristics of the sample tested, such as attrition and self-selection.
B) the number of items on the test, with longer tests demonstrating higher predictive validity.
C) the correlation coefficient chosen to measure the validity.
D) the administration time required for the test compared with that of the criterion test chosen.