Appraisal of: Pohl, S. Boolean and Ranked Information Retrieval for Biomedical Systematic Reviewing [thesis]. Department of Computer Science and Software Engineering: University of Melbourne; 2012.
The aim of the study was to devise and examine ranked retrieval methods with regard to their applicability to the search tasks involved in the preparation and update of systematic reviews. A ranked retrieval alternative in the form of the p-norm extended Boolean retrieval (EBR) model was shown to provide advantages over the current Boolean approach, but to also satisfy important task specific requirements. Using this retrieval method, a greater number of relevant studies than with the current Boolean approach can be identified for inclusion in systematic reviews, reducing the dependence on potentially biased secondary search methods. The method is close to current practice and hence requires minimal changes to the current process, which should facilitate its adoption.