We analyze what type of knowledge about intervention processes these two methodologies provide and discuss strengths and weaknesses as well as potentials for mixed methods evaluation methodologies. In this paper, we use the quantitative and qualitative process data from an organizational intervention conducted in a national postal service, where the Intervention Process Measure questionnaire ( N = 285) as well as an extensive interview study ( N = 50) were used. Both methods are established tools, but their distinct epistemological properties enable them to illuminate different aspects of organizational interventions. To analyze intervention processes two methodological approaches have widely been used: quantitative (often questionnaire data), or qualitative (often interviews). Organizational interventions aiming at improving employee health and wellbeing have proven to be challenging to evaluate. 3Norwich Business School, University of East Anglia, Norwich, UK.2Department of Psychology, Norwegian University of Science and Technology, Trondheim, Norway.
1The National Research Centre for the Working Environment, Copenhagen, Denmark.
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