ecologic fallacy

e·co·log·i·c fal·la·cy

(ē'kō-loj'ik fal'ă-sē),
The bias that may occur because an association observed between variables at an aggregate level does not necessarily represent an association that exists at an individual level; an error of inference due to failure to distinguish between different levels of organization.
References in periodicals archive ?
For example, the potential confounding due to the latency period and ecologic fallacy must be considered in interpretation.
It is well known that such studies are very susceptible to the ecologic fallacy. Therefore, better individual-level studies with careful exposure assessment (22) and new, innovative designs, such as the case-crossover design (23), clearly have been needed.
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