Depression Screening (Standard) | Tool Guide

A standard depression screener is an early-warning instrument. It is useful when you feel persistently “off” but cannot yet describe the pattern clearly. ## What this assessment does The tool converts subjective discomfort into observable symptom signals, often around low mood, anhedonia, sleep, energy, appetite, concentration, and guilt/self-worth. ## Model logic: from input to output Input samples symptom frequency across a short period. Output returns a risk/severity band to support next-step decisions: continue observation, start lifestyle intervention, or seek professional care. ## Turning score into action Do not overfocus on a single score. Combine score with function impact: work, study, social connection, and daily self-care. If function is declining, escalation is warranted even when uncertainty remains. ## Trend > one-time result The highest utility comes from repeated measurement and context linkage: sleep changes, stress events, physical illness, and medication shifts. ## Scientific boundaries Screening does not equal diagnosis. Use this tool as a decision aid and communication bridge, not as a final judgment about identity or worth. ## References [1] Kroenke, K., Spitzer, R. L., & Williams, J. B. W. (2001). The PHQ-9. [2] Kroenke, K., Spitzer, R. L., & Williams, J. B. W. (2003). The PHQ-2.