STAGE 3 SLEEP By N., Pam M.S. - April 13, 2013 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 STAGE 4 SLEEP STAGE 1 SLEEP SLEEP SPINDLES SLEEP STAGES SLOW-WAVE SLEEP BURST-PAUSE FIRING STAGE 2 SLEEP SLEEP CYCLE SPIKE-AND-WAVE DISCHARGES KAPPA WAVE Cite this page: N., Pam M.S., "STAGE 3 SLEEP," in PsychologyDictionary.org, April 13, 2013, https://psychologydictionary.org/stage-3-sleep/ (accessed December 13, 2019).