English Language & Usage Stack Exchange is a question and answer site for linguists, etymologists, and serious English language enthusiasts. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

What is the meaning of common method bias in the sentence below?

A second limitation concerns the fact that we only used self-report questionnaires. Common method bias may thus have influenced some of the results.

share|improve this question

closed as too localized by FumbleFingers, MετάEd, Matt E. Эллен, Mahnax, StoneyB Sep 22 '12 at 13:40

This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

you might get a better result if you ask in the chat of the cognitive sciences Stack Exchange – Matt E. Эллен Sep 20 '12 at 9:21
up vote 2 down vote accepted

StatWiki explains that:

Common method bias refers to a bias in your dataset due to something external to the measures.

In other words, the measured difference is due to the study itself (or something else), rather than the actuality of the situation.

The bias can occur because of the way the questions are constructed, the way in which they're asked, the audience to which they're asked, etc.

In the example OP gives, self-reporting is the source of the bias; the reasons the results of such a questionnaire are compromised are explained here.

share|improve this answer

Not the answer you're looking for? Browse other questions tagged or ask your own question.