Research findings indicate that people's verbal reports of their behavior and observations of their actual behavior do not always match. these findings provide a good rationale for a(n) approach to psychological research.

Multi- Method  approach

Explanation:

Multi-method approach is the technique through which the research is carried out using two or more methods.This technique helps in gaining the precise and descriptive result through data collection.In this case variation in outcomes can also be seen due to different observation or data obtained from different method.

According to the question, research finding can vary because the observation and results received because modes of conducting research was different i.e.-through verbal method and actual method .

answer; i believe the correct answer is norming;