Reviews summarise findings from several comparable primary research studies. There are various kinds of reviews that differ in terms of the methodology applied.
Narrative reviews usually provide a broad overview of a specific topic. The studies addressed are chosen subjectively, however.
Pieper, D., Ober, P., Dressler, C., Schmidt, S., Mathes, T., & Becker, M. (2019). Effizientere Leitlinienerstellung – eine narrative Übersichtsarbeit. Zeitschrift für Evidenz, Fortbildung und Qualität im Gesundheitswesen, 146, 1–6.
https://doi.org/10.1016/j.zefq.2019.08.004
Systematic reviews aim to incorporate all relevant literature on a subject. The methodological approach is disclosed transparently (where exactly what was searched for and which selection and evaluation criteria were applied).
Jungjohann, J., Gegenfurtner, A., & Gebhardt, M. (2018). Systematisches Review von Lernverlaufsmessung im Bereich der frühen Leseflüssigkeit. Empirische Sonderpädagogik, 10(1), 100–118. https://doi.org/10.25656/01:15963
Meta-analyses evaluate the results of primary research studies using statistical methods in order to derive greater explanatory power from the results. To make this possible, all relevant literature must first be searched for as well. The process is also presented here in a transparent and comprehensible manner.
Schudey, A. P., Jensen, O., & Kraiczy, N. D. (2016). "Made in?" – Eine Metaanalyse multidimensionaler Country-of-Origin Effekte. Schmalenbachs Zeitschrift für betriebswirtschaftliche Forschung, 68(1), 47–74. https://doi.org/10.1007/s41471-016-0002-0
Source: Ressing, M., Blettner, M., & Klug, S. J. (2009). Systematische Übersichtsarbeiten und Metaanalysen. Deutsches Aerzteblatt, 106(27), 456–463. https://doi.org/10.3238/arztebl.2009.0456
