Kari's Research Study Measured the Effects of Cooperative Learning on Learners

Multiple Choice

Kari's research study measured the effects of cooperative learning on learners' ability to solve complex problems. After scoring the problems and entering the data, her advisor told her she must have another researcher score the problems. Interestingly, the scores she gave the participants did not match the scores that the other researcher gave. Kari's scoring problem is indicative of a problem with

A) internal consistency reliability.
B) inter-rater reliability.
C) content validity.
D) consequential validity.