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A relative frequency is typically used with smaller,but not larger,data sets.
Posttraumatic Stress Disorder
A psychiatric state initiated by involvement in or observation of an alarming situation, featuring persistent flashbacks, nightmares, and heightened anxiety.
Flashbacks
Intense, vivid recollections of a past experience, often traumatic, that momentarily feels as if it is happening in the present.
Nightmares
Disturbing dreams that cause fear or anxiety, often waking the sleeper and can be related to stress or psychological issues.
Severe Depression
A mental health disorder characterized by persistently depressed mood or loss of interest in activities, causing significant impairment in daily life, more intense than general depression.
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