A debate has arisen out of the need to understand true intervention outcomes in the social sciences. Traditionally, the randomized, controlled trial (RCT) that answers the question of 'what works' has been considered the gold standard. Although RCTs have been favoured in organizational intervention research, there has been an increasing interest in understanding the influence of context and intervention processes on the outcomes of such interventions. In the present critical essay, we question the suitability of RCTs and meta-analyses to evaluate the effectiveness of organizational interventions and we suggest that realist evaluation that seeks to answer the questions of what works for whom in which circumstances may present a more suitable framework. We argue that examining the content and process mechanisms through which organizational interventions are effective, and the conditions under which these are triggered, will enable us to better understand how interventions achieve the desired outcomes of improved employee health and well-being. We suggest that organizational intervention content and process mechanisms may help bring about the desired outcomes of improved employee health and well-being and that contextual factors determine whether these mechanisms are triggered.
KeywordsCMO-configurations, context-mechanism-outcome configurations, critical essay, metaanalysis, organizational interventions, randomized controlled trial, realist evaluation, realist synthesis What works for whom?What works for whom?The randomized, controlled trial has been perceived as the gold standard for evaluating interventions (Guyatt et al., 1995). The RCT approach employs a successionist approach to causation, i.e. that randomization holds the context constant, there are no differences at baseline between the intervention and the control group, and outcomes can be inferred from comparing those exposed to the intervention to those not exposed to the intervention. When intended outcomes can be observed statistically above and beyond outcomes in the control group, it is assumed that these outcomes can be attributed to the intervention. Implicit in this line of thinking is that intervention outcomes can be aggregated What works for whom?In the field of organizational interventions the RCT design has been met with criticism (Nielsen, 2013a). Organizational interventions can be defined as planned, behavioural, theory-based actions that aim to improve employee health and well-being through changing the way work is designed, organized and managed (e.g. Nielsen, 2013a;Richardson and Rothstein, 2008). In the present essay, we argue that realist evaluation (Pawson, 2013;Pawson and Tilley, 1997) may offer an opportunity to develop an integrated context, process and outcome evaluation framework that may advance our theoretical understanding of which elements of organizational interventions may be effective and in which conditions we can expect positive outcomes. Realist evaluation offers a way to conduct rigorous, theory-based analyse...