More methods can result in more knowledge: Why psychology needs to use multi-method approaches

Abstract

There is an overabundance of mono-method approaches and research designs used in psychology. Mono-method approaches (use of a single method of measurement) are problematic because, surprisingly, different methods for measuring the same thing often do not yield comparable scores. Multi-method assessment, however, often leads to more complete and precise findings. To better understand people, multi-method approaches in research and clinical practice need to become common practice in psychology. Intervening at an early stage of education might be the most fruitful tactic for initiating this change. Doing so by addressing current insufficiencies in psychological assessment training might be an advantageous route for facilitating successful transition.