What variable would account for the dramatic jump in test scores evidenced by the students in Rosenthal and Jacobson's Pygmalion in the Classroom?

Question

Quizplus · Accepted Answer

The Pygmalion effect refers to the phenomenon where higher expectations from teachers lead to an increase in student performance. In the study, the teacher's positive attitude towards some students led to higher expectations, which ultimately contributed to the dramatic jump in test scores. Thus, teacher attitudes would account for the dramatic jump in test scores evidenced by the students.

What Variable Would Account for the Dramatic Jump in Test