STAGE 3 SLEEP By N., Sam M.S. - 4 slow wave stage with spindles mixed in with higher amplitude delta waves. Have a look on sleep stages. STAGE 3 SLEEP: "Stage 3 sleep is slow wave sleep." Related Psychology Terms BRAIN WAVES (Electroencephalogram, EEG) HEARING (AUDITION) ADOLESCENCE (Theories) Piaget’s Theory of Cognitive Development DREAM-STATE (D-STATE, REM- STATE) STAGE 4 SLEEP SLEEP STAGES SLEEP SPINDLES SPIKE-AND-WAVE DISCHARGES SCHIZOPHRENIA (OTHER TYPES) Cite this page: N., Sam M.S., "STAGE 3 SLEEP," in PsychologyDictionary.org, April 13, 2013, https://psychologydictionary.org/stage-3-sleep/ (accessed August 13, 2022).