PHOTOPERIODISM By N., Sam M.S. - 2 noun. the physiological and behavioral responses of plants and animals to modifications in the length of days or in the severity of light in the surroundings. PHOTOPERIODISM: "Today, we are going to outline the concept of photoperiodism." Related Psychology Terms RORSCHACH TEST Using the Hamilton Depression Rating Scale: A Case Study on Grief REACTION TIME (Response Latency) ROSENZWEIG PICTURE-FRUSTRATION STUDY (P-F) DELAYED REACTION EMOTION (Theories) LEARNING (GENERAL) DREAM-STATE (D-STATE, REM- STATE) DOMINANCE RELATIONSHIP EARLY INFANTILE AUTISM Cite this page: N., Sam M.S., "PHOTOPERIODISM," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/photoperiodism/ (accessed August 10, 2022).