Lack of Method Variance in Self-Reported Affect and Perceptions at Work: Reality or Artifact?

Spector (1987) recently concluded that there is little evidence of method variance in multitrait-multimethod studies of self-reported affect and perceptions at work. In this article we propose that this conclusion was incorrect and was the result of improper analytical procedures. Spector's data were reanalyzed by using a more powerful approach: confirmatory factor analysis. Model comparisons and variance partitioning indicated that method variance is present and accounts for approximately 25% of the variance in the measures examined by Spector.