What Is the Biggest Problem with the Probabilistic Contrast Model

Multiple Choice

What is the biggest problem with the probabilistic contrast model?

A) Focal sets cannot always be precisely determined a priori.
B) Focal sets differ in terms of which cues (elements, compounds, etc.) are relevant in a given situation.
C) It predicts trial order effects when the order in which events are experienced is irrelevant in determining how to respond.
D) We cannot possibly store enough information to accurately calculate the relevant probabilities.