Background
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The <strong>Major Depression Inventory (MDI)</strong> is a widely used self-report screening instrument developed to assess symptoms commonly associated with depressive disorders and emotional distress.
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The MDI focuses on mood symptoms, loss of interest, fatigue, guilt, hopelessness, concentration difficulties, restlessness, slowed behavior, sleep problems, and appetite changes commonly experienced during depressive episodes.
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The questionnaire was designed to evaluate both the severity and frequency of depressive symptoms while supporting clinical screening, research, and mental health assessment settings.
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<h4>Psychological Domains Measured</h4>
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<strong>Depressed Mood</strong>
<span>Measures sadness, emotional distress, low mood, and reduced emotional well-being.</span>
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<strong>Loss of Interest</strong>
<span>Measures reduced enjoyment, emotional disengagement, and loss of interest in daily activities.</span>
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<strong>Fatigue and Low Energy</strong>
<span>Measures tiredness, exhaustion, low motivation, and reduced emotional and physical energy.</span>
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<strong>Self-Confidence</strong>
<span>Measures self-esteem, confidence, and feelings of personal adequacy or self-worth.</span>
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<strong>Guilt and Self-Blame</strong>
<span>Measures guilt, self-criticism, negative self-evaluation, and feelings of personal failure.</span>
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<strong>Hopelessness and Suicidal Thoughts</strong>
<span>Measures hopelessness, feelings that life lacks value, and thoughts related to death or self-harm.</span>
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<strong>Concentration Difficulties</strong>
<span>Measures focus problems, distractibility, and difficulties maintaining attention.</span>
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<strong>Restlessness</strong>
<span>Measures agitation, internal tension, nervous energy, and inability to remain calm.</span>
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<strong>Psychomotor Slowing</strong>
<span>Measures slowed thinking, reduced movement, low responsiveness, and behavioral slowing.</span>
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<strong>Sleep Difficulties</strong>
<span>Measures insomnia, nighttime sleep disruption, and difficulty maintaining healthy sleep patterns.</span>
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<strong>Reduced Appetite</strong>
<span>Measures appetite loss, reduced eating motivation, and decreased food intake.</span>
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<strong>Increased Appetite</strong>
<span>Measures increased eating behavior, emotional eating, and appetite elevation.</span>
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The MDI is commonly used in psychology, psychiatry, healthcare, research, and mood disorder screening settings. The questionnaire is intended as a screening instrument and should not be used as a standalone diagnostic tool.
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