S SLEEP By N., Sam M.S. - 4 Recurrent period of deep sleep distinguished by the presence of slow brain waves and by very little dreaming. Compare with: D sleep. S SLEEP: "S sleep is one of the deepest stages of sleep." Related Psychology Terms BRAIN WAVES (Electroencephalogram, EEG) DREAM-STATE (D-STATE, REM- STATE) ADOLESCENCE (Theories) Piaget’s Theory of Cognitive Development DREAM INTERPRETATION (Historical) Dissociative Identity Disorder CHILD PSYCHIATRY PRENATAL DEVELOPMENT CEREBRAL CORTEX EPILEPSY (Symptoms and Types) Cite this page: N., Sam M.S., "S SLEEP," in PsychologyDictionary.org, April 28, 2013, https://psychologydictionary.org/s-sleep/ (accessed September 26, 2022).