What is OBSERVER?

Written by Pam MS, NCSP | Fact checked by Psychology Dictionary staff 

noun. 1. one who produces or documents an observation. 2. with regard to telepathy experiments, a partaker who is neither the assigned sender nor the assigned receiver. Their job is frequently to protect against experimenter bias or other methodological mistakes.

OBSERVER: "The observers were tired after a full eight-hour day of viewing intermittent changes in the rats' dispositions."

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