Dictionary of Human Evolution and Biology

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Ad Libitum (ad Lib.)

(Latin) at pleasure; applied in science when no constraints are placed on the experimental subject. In ad libitum sampling there are no set procedures as to what is recorded or when it is recorded. In primate behavior studies in which no constraints are placed upon when or what is recorded, the observer records any relevant behavior that is visible during observation. This technique is prone to bias in favor of conspicuous behavior or individuals. Aka haphazard sampling, convenience sampling.

Cf. behavior, focal sampling, scan sampling.

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