In order to examine common method bias, the current study followed the recommendations made by Podsakoff and his colleagues(2003). Podsakoff, Mackenzie, Lee, and Podsakoff (2003, p. 899) argued that when ‘‘a researcher cannot obtain the predictor and criterion variables from different sources, cannot separate the measurement context, and cannot identify the source of the method bias, it is best to use a single-common method-factor approach to statistically control for method biases’’. The current study met the above criteria and therefore used the Harman’s single-factor test to examine common method bias.