Examlex
The internal validity of the pre-post designs is threatened by threats related to time.
Circadian Rhythms
Biological processes that display an endogenous, entrainable oscillation of about 24 hours, affecting sleep patterns, hormone release, and other bodily functions.
Plants
Living organisms belonging to the kingdom Plantae that typically produce their own food through photosynthesis and have cell walls.
Depressants
Substances that reduce the activity of the central nervous system, often used to induce calmness, reduce anxiety, or promote sleep.
Reduced Anxiety
A state or condition in which feelings of worry, nervousness, or unease are diminished or less intense.
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