STAGE 1 SLEEP By N., Sam M.S. - 8 the initial stage of sleep with low amplitude waves with an irregular frequency. Read sleep stages for clarity. STAGE 1 SLEEP: "Stage 1 sleep is the early stage of sleep." Related Psychology Terms BRAIN WAVES (Electroencephalogram, EEG) ADOLESCENCE (Theories) HEARING (AUDITION) HEARING Piaget’s Theory of Cognitive Development DREAM-STATE (D-STATE, REM- STATE) CHILD PSYCHIATRY PEAK-CLIPPING CIVILIAN CATASTROPHE REACTIONS Dissociative Identity Disorder Cite this page: N., Sam M.S., "STAGE 1 SLEEP," in PsychologyDictionary.org, April 13, 2013, https://psychologydictionary.org/stage-1-sleep/ (accessed February 6, 2023).