Which theorists have been most directly criticized for underestimating the variability of behavior from situation to situation?

Trait

Explanation:

Based on the information provided within the question it can be said that the theorists being mentioned are called Trait Theorists. In the context of psychology, trait theory is an approach which focuses on the study of human personality, and how the measurements of traits are defined as frequent patterns of behavior in individuals.

your question is incomplete

explanation:

the above statement/question is (true);