Publication Bias - Definition

Definition

According to one publication:

Publication bias occurs when the publication of research results depends on their nature and direction.

Positive results bias, a type of publication bias, occurs when authors are more likely to submit, or editors accept, positive than null (negative or inconclusive) results. A related term, "the file drawer problem", refers to the tendency for negative or inconclusive results to remain unpublished by their authors.

Outcome reporting bias occurs when several outcomes within a trial are measured but are reported selectively depending on the strength and direction of those results. A related term that has been coined is HARKing (Hypothesizing After the Results are Known).

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