This screen is based on the description of seasonal affective disorder (SAD) by Rosenthal and colleagues (1984). It asks about mood and energy changes across seasons. Source: Rosenthal et al., 1984 (PubMed).
How to use it: Answer about changes you notice across the year honestly.
Reading your score: More seasonal symptoms suggest a professional evaluation is worthwhile. It flags risk, not a diagnosis.
Limitations: This is a self-report screening tool, not a diagnosis. Many people have mild winter dips.
When to seek help: If seasonal low mood affects your life, consider a clinician; light therapy and other treatments exist. If you ever feel you might harm yourself, contact 988 (US) right away.
Related: Our PHQ-9 Mood Self-Check and Mental Health Help (US).