Speech and Hearing Research Guide

The College of Arts & Sciences, Department of Speech & Hearing Science

Definition and Background

Evidence-based medicine is the "conscientious, explicit and judicious use of current best evidence in making decisions about the care of individual patients" Sackett, DL, Rosenberg WM, Gray JA, et al. BMJ. 1996 312(7023):71-2.

Evidence Based Practice-American Speech-Language Hearing Association - Introduction and key steps in the EBP process. 

Position Statement: Evidence-Based Practice in Communication Disorders Joint Coordinating Committee on Evidence-Based Practice - Official policy document of the American Speech Language Hearing Association 

 

Evidence Synthesis NOTE:

In our current staffing environment, our liaison librarians do not have the capacity to support evidence synthesis beyond the resources provided in this guide. Please refer to the Health Sciences Guide for additional resources.

Things to consider before deciding to do an evidence synthesis project

Before one begins an evidence synthesis project, there are a number of things to consider:

  • Firstly, different types of evidence synthesis may be more or less suited to different research questions. You'll need to choose the type of review that will best answer your particular question. (This will likely involve some initial literature searching to determine the state of research in your field and any other evidence synthesis recently done in your areas.)
  • Evidence synthesis methodology takes time. Generally a review is going to take at least a year, and quite possibly longer. 
  • Best practice for evidence synthesis also involves at least two reviewers.
  • You will also want to consider if you're going to include non-English language articles and/or grey literature in your review, and this might add additional time considerations and challenges to your work.
  • Other considerations might also include: the need to update searches if a project takes a significant amount of time; that the goals of transparency and reproducibility require very detailed records of your searches, results, and methods; and that for further transparency a risk of bias assessment is often done on each included study in your review.  

To help your research run smoothly, it is probably a good idea to think through a lot of these considerations at the beginning. Hopefully this guide will help!

Common types of evidence synthesis

Review type decision tree

decision tree for types of systematic review

Decision tree from Cornell University Library.

Databases

Books and More