Before revision: (The expression "a mathematical function of person and item parameters" is analogous to Kurt Lewin’s equation B = f(P, E), which asserts that behavior is a function of the person in their environment.)
After revision: (The expression "a mathematical function of person and item parameters" is analogous to Lewin's equation, B = f(P, E), which asserts that behavior is a function of the person in their environment.)