EFFICACY By N., Pam M.S. - April 7, 2013 1.The competence of behavioural performance with reference to a person's perception of performance capabilities. 2. Pharmacology. Dealing with dose relationship. EFFICACY: "Efficacy deals with how we percieve our performances." Related Psychology Terms POTENCY BIOAVAILABILITY GERIATRIC PSYCHOPHARMACOLOGY PERFORMANCE ASSESSMENT OVERTRAINING SYNDROME PSYCHOPHYSIOLOGY PERFORMANCE AROUSAL-PERFORMANCE RELATIONSHIP PEDIATRIC PSYCHOPHARMACOLOGY BENCHMARK Cite this page: N., Pam M.S., "EFFICACY," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/efficacy/ (accessed September 1, 2019).