Examlex
Piaget labeled his second stage preoperational, because children at this stage
Fourth Stage
A phase or level in a sequence or process, the specific nature of which depends on the context it is used in (e.g., Erikson's stages of psychosocial development, the stages of labor).
Sleep Cycle
A period of sleep lasting about 90 minutes and including one or more stages of NREM sleep, followed by REM sleep.
REM Stage
A phase of sleep characterized by rapid eye movements, dreaming, and increased brain activity.
Hyperalertness
An exaggerated state of alertness or vigilance, where an individual is overly aware and reactive to environmental stimuli.
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