Searching for information falls generally into two categories:
The 6S Pyramid is useful for understanding how sources of information are evaluated in relation to one another. Sources from the higher levels of the pyramid are built from sources at lower levels.
Except for the individual studies (contained within the lowest level of the pyramid), information sources at the higher levels of the pyramid have been critically appraised in some way.
Note: There is a hierarchy of study designs within the studies layer, which is not shown in this pyramid.
Figure adapted from: Dicenso, A., Bayley, L., & Haynes, R. (2009). Accessing pre-appraised evidence: Fine-tuning the 5S model into a 6S model. Evidence Based Nursing, 12(4), 99.
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