我用的是40%。参考Podsakoff et al. (2003)的文章。[1] Podsakoff, P. M., MacKenzie, S. B., Lee, J. Y., & Podsakoff, N. P. (2003). Common method biases in behavioral research: a critical review of the literature and recommended remedies. Journal of Applied Psychology. 88(5): 879-903. 一般研究中的所有变量从同样的调查对象处收集,或者为同一时间收集的时候要做。