Melvyn Hamstra works as an assistant professor in Work and Organizational Psychology at the University of Amsterdam. Between 2009 and 2013 he wrote his dissertation on "Self-Regulation in a Social Environment" at the University of Groningen. His research and interests can be placed at the interface between social/organizational processes and motivational/self-regulation factors. This includes effects of motivational/self-regulation variables on social and organizational behavior, effects of the social/organizational environment on motivation/self-regulation outcomes, and the effects of the interplay between social/organizational factors and motivation/self-regulation factors on beneficial and detrimental outcomes.

For a detailed description of these different research areas, see www.melvynhamstra.com/research

• Hamstra, M.R.W., Rietzschel, E.F., & Groeneveld, D.M. (in press). To go or not to go for the sell: Regulatory focus and personal sales performance. Journal of Personnel Psychology.

• Hamstra, M.R.W., Van Yperen, N.W., Wisse, B., & Sassenberg, K. (2014). Transformational and transactional leadership and followers’ achievement goals. Journal of Business and Psychology, 29, 413-425. doi: 10.1007/s10869-013-9322-9

• Hamstra, M.R.W., Van Yperen, N.W., Wisse, B., & Sassenberg, K. (2014). On the perceived effectiveness of transformational-transactional leadership: The role of encouraged strategies and followers’ regulatory focus. European Journal of Social Psychology, 44, 634-656. doi: 10.1002/ejsp.2027

• Hamstra, M.R.W., Sassenberg, K., Van Yperen N.W., & Wisse, B. (2014). Followers feel valued – When leaders’ regulatory focus makes leaders exhibit behavior that fits followers’ regulatory focus. Journal of Experimental Social Psychology, 51, 34-40. doi: 10.1016/j.jesp.2013.11.003
• Hamstra, M.R.W. (2014). ‘Big’ men: Male leaders’ height positively relates to followers’ perception of charisma. Personality and Individual Differences, 56, 190-192. doi: 10.1016/j.paid.2013.08.014
• Hamstra, M.R.W., Orehek, E., & Holleman, M. (2014). Subordinate regulatory mode and leader power: Interpersonal regulatory complementarity predicts task performance. European Journal of Social Psychology, 51, 34-40. doi: 10.1016/j.jesp.2013.11.003
• Hamstra, M.R.W., Van Yperen, N.W., Wisse, B., & Sassenberg, K. (2013). Like or dislike: Intrapersonal regulatory fit strengthens the intensity of interpersonal evaluation. Journal of Experimental Social Psychology. 49, 726-731. doi: 10.1016/j/jesp.2013.03.002
• Hamstra, M.R.W., Bolderdijk, J.W., & Veldstra, J.L. (2011). Everyday risk taking as a function of regulatory focus. Journal of Research in Personality, 45, 134-137. doi: 10.1016/j.jrp.2010.11.017
• Hamstra, M.R.W., Van Yperen, N.W., Wisse, B., & Sassenberg, K. (2011). Transformational-transactional leadership styles and followers’ regulatory focus: Fit reduces followers’ turnover intentions. Journal of Personnel Psychology, 10, 182-186. doi: 10.1027/1866-5888/a000043
• Van Yperen, N.W., Hamstra, M.R.W., & van der Klauw, M. (2011). To win, or not to lose, at any cost: The impact of achievement goals on cheating. British Journal of Management, 22, S5-S15. doi: 10.1111/j.1467-8551.2010.00702.x
• You can download these papers from my external website: www.melvynhamstra.com/publications 

Melvyn Hamstra teaches the third year Bachelor course "Leadership" and co-teaches the third year course "Design, Operationalization, and Analysis".

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