Skip to main content
Divergence

How Divergence works

Divergence uses validated, publicly available self-report screeners — instruments developed and published by researchers and clinicians. It starts with a short triage and expands into condition-specific sections only when your earlier answers suggest they'd be informative.

Divergence is not a diagnosis. Only a licensed clinician can diagnose the conditions screened for here.

See the coverage map

A bipartite graph of every instrument and the conditions it informs — useful for seeing breadth and overlap at a glance.

Open coverage map

Instrument bank

  • PHQ-9 — Patient Health Questionnaire-9 Full verified against source (2001-09-01)

    Kroenke K, Spitzer RL, Williams JBW. The PHQ-9: validity of a brief depression severity measure. J Gen Intern Med. 2001;16(9):606-613.

    Licensing: Free, no permission required. Placed in the public domain by Pfizer.

  • GAD-7 — Generalized Anxiety Disorder 7-item Full verified against source (2006-05-22)

    Spitzer RL, Kroenke K, Williams JBW, Löwe B. A brief measure for assessing generalized anxiety disorder: the GAD-7. Arch Intern Med. 2006;166(10):1092-1097.

    Licensing: Free, public domain (Pfizer).

  • ASRS-B — Adult ADHD Self-Report Scale v1.1 — Part B Full needs clinician review

    Kessler RC et al. The WHO adult ADHD self-report scale (ASRS). Psychol Med. 2005;35(2):245-56.

    Licensing: Free. Developed by WHO. Part B provides additional symptom coverage beyond the 6-item screener.

  • PCL-5 — PTSD Checklist for DSM-5 Full needs clinician review

    Weathers FW, Litz BT, Keane TM, Palmieri PA, Marx BP, Schnurr PP. The PTSD Checklist for DSM-5 (PCL-5). 2013. National Center for PTSD (www.ptsd.va.gov).

    Licensing: Free, public domain (US VA / National Center for PTSD). 20 items mapped to DSM-5 PTSD criteria B-E; total ≥ 33 is a commonly used threshold for probable PTSD.

  • RAADS-14 — Ritvo Autism Asperger Diagnostic Scale — 14-item screen Full needs clinician review

    Eriksson JM, Andersen LMJ, Bejerot S. RAADS-14 Screen: validity of a screening tool for autism spectrum disorder in an adult psychiatric population. Molecular Autism. 2013;4(1):49.

    Licensing: Free for clinical and research use with citation. 14 items scored 0-3; total ≥ 14 is the published screening threshold. Reverse-scored items have score_value inverted directly in the option set.

  • Y-BOCS-SR — Yale-Brown Obsessive-Compulsive Scale — Self-Report Full needs clinician review

    Goodman WK, Price LH, Rasmussen SA, et al. The Yale-Brown Obsessive-Compulsive Scale. Arch Gen Psychiatry. 1989;46(11):1006-11. Self-report version validated in Steketee, Frost, & Bogart (1996).

    Licensing: Free for clinical and research use with citation. 10 items: 5 for obsessions and 5 for compulsions. Typical cutoffs: 0-7 subclinical, 8-15 mild, 16-23 moderate, 24-31 severe, 32-40 extreme.

  • ITQ-DSO — International Trauma Questionnaire — Disturbances in Self-Organization Full needs clinician review

    Cloitre M, Shevlin M, Brewin CR, et al. The International Trauma Questionnaire: development of a self-report measure of ICD-11 PTSD and complex PTSD. Acta Psychiatr Scand. 2018;138(6):536-46.

    Licensing: Free for clinical and research use. We include only the six DSO symptom items (affective dysregulation, negative self-concept, disturbances in relationships) because PCL-5 already covers the PTSD symptom cluster. ICD-11 Complex PTSD is diagnosed when ≥1 symptom from each of the three DSO clusters is endorsed at 'moderately' or higher AND there is functional impairment. We approximate this with a summed cutoff; the `requires_review` flag reflects that this is a simplification.

  • HCL-32 — Hypomania Checklist — 32 items Full needs clinician review

    Angst J, Adolfsson R, Benazzi F, et al. The HCL-32: towards a self-assessment tool for hypomanic symptoms in outpatients. J Affect Disord. 2005;88(2):217-33.

    Licensing: Free for clinical and research use. Instruction frame: items are endorsed only for elevated / 'high' periods distinct from the person's usual state. Cutoff ≥ 14 optimally distinguishes bipolar disorder from unipolar depression; ≥ 10 is more sensitive to bipolar II. We run HCL-32 as a follow-up to MDQ because MDQ is known to under-detect bipolar II.

  • CAT-Q — Camouflaging Autistic Traits Questionnaire Full needs clinician review

    Hull L, Mandy W, Lai M-C, et al. Development and Validation of the Camouflaging Autistic Traits Questionnaire (CAT-Q). J Autism Dev Disord. 2019;49(3):819-33.

    Licensing: Free for clinical and research use with citation. 25 items on a 7-point Likert from Strongly disagree (1) to Strongly agree (7). Five items (3, 12, 19, 22, 24) are reverse-scored. Total range 25-175. Total ≥ 100 suggests high camouflaging; ≥ 120 high confidence. CAT-Q is most meaningful as a follow-up to an autism-signal triage; we enqueue it from AQ-10 or RAADS-14 elevation.

  • EAT-26 — Eating Attitudes Test — 26 items Full needs clinician review

    Garner DM, Olmsted MP, Bohr Y, Garfinkel PE. The eating attitudes test: psychometric features and clinical correlates. Psychol Med. 1982;12(4):871-8.

    Licensing: Free for clinical and educational use with citation. Scoring: Always=3, Usually=2, Often=1, and Sometimes/Rarely/Never=0 — except item 26 which is reverse-scored (Never=3 etc.). Total ≥ 20 suggests high risk of a clinically significant eating-pattern concern. Gated by a positive SCOFF so it only runs when there is existing signal.

  • MGH-HPS — Massachusetts General Hospital Hairpulling Scale Subtype narrowing needs clinician review

    Keuthen NJ, O'Sullivan RL, Ricciardi JN, et al. The MGH-Hairpulling Scale: 1. development and factor analyses. Psychother Psychosom. 1995;64(3-4):141-5.

    Licensing: Free for clinical and research use with citation.

  • SPS-R — Skin Picking Scale — Revised Subtype narrowing needs clinician review

    Snorrason I, Olafsson RP, Flessner CA, Keuthen NJ, Franklin ME, Woods DW. The Skin Picking Scale-Revised: factor structure and psychometric properties. J Obsessive Compuls Relat Disord. 2012;1(2):133-7.

    Licensing: Free for clinical and research use with citation.

  • HRS-5 — Hoarding Rating Scale Subtype narrowing needs clinician review

    Tolin DF, Frost RO, Steketee G. A brief interview for assessing compulsive hoarding: the Hoarding Rating Scale-Interview. Psychiatry Res. 2010;178(1):147-52.

    Licensing: Free for clinical and research use with citation.

  • PHQ-2 — Patient Health Questionnaire-2 Triage verified against source (2001-09-01)

    Kroenke K, Spitzer RL, Williams JBW. The Patient Health Questionnaire-2: validity of a two-item depression screener. Med Care. 2003;41(11):1284-92.

    Licensing: Free, no permission required (Pfizer). The PHQ-2 is items 1 and 2 of the PHQ-9.

  • GAD-2 — Generalized Anxiety Disorder 2-item Triage verified against source (2007-03-06)

    Kroenke K, Spitzer RL, Williams JBW, Monahan PO, Löwe B. Anxiety disorders in primary care: prevalence, impairment, comorbidity, and detection. Ann Intern Med. 2007;146(5):317-25.

    Licensing: Free, no permission required (Pfizer). GAD-2 is items 1 and 2 of the GAD-7.

  • ASRS-A — Adult ADHD Self-Report Scale v1.1 — Part A (6-item screener) Triage needs clinician review

    Kessler RC et al. The WHO adult ADHD self-report scale (ASRS): a short screening scale for use in the general population. Psychol Med. 2005;35(2):245-56.

    Licensing: Free. Developed by WHO. Scored by counting shaded-box responses; 4 or more = positive screen.

  • AQ-10 — Autism-Spectrum Quotient (AQ-10) Triage verified against source (2012-02-01)

    Allison C, Auyeung B, Baron-Cohen S. Toward brief 'Red Flags' for autism screening: the Short AQ-10 in 1,000 cases and 3,000 controls. J Am Acad Child Adolesc Psychiatry. 2012;51(2):202-12. See also NICE CG142.

    Licensing: Free for non-commercial clinical use with citation. Per NICE, score 1 per item when 'Definitely agree' or 'Slightly agree' on forward items, or 'Definitely disagree' or 'Slightly disagree' on reverse items. Cutoff >=6 = refer for assessment.

  • OCI-R — Obsessive-Compulsive Inventory — Revised Triage needs clinician review

    Foa EB, Huppert JD, Leiberg S, Langner R, Kichic R, Hajcak G, Salkovskis PM. The Obsessive-Compulsive Inventory: development and validation of a short version. Psychol Assess. 2002;14(4):485-96.

    Licensing: Free for non-commercial clinical and research use with citation.

  • BFRB-STEM — Body-Focused Repetitive Behaviour Stem Triage needs clinician review

    Internal Spectrum stem. Based on DSM-5 diagnostic criteria for Trichotillomania (312.39) and Excoriation / Skin-Picking Disorder (698.4). Single-item stems modelled on the PHQ-2 / GAD-2 pattern: sensitive gate to a validated follow-up (MGH-HPS / SPS-R).

    Licensing: Internal. Not a validated instrument — used only as a branching gate. Positive responses route to validated follow-ups (MGH-Hairpulling Scale or Skin Picking Scale — Revised).

  • MDQ — Mood Disorder Questionnaire (core symptom items) Triage needs clinician review

    Hirschfeld RM et al. Development and validation of a screening instrument for bipolar spectrum disorder: the Mood Disorder Questionnaire. Am J Psychiatry. 2000;157(11):1873-5.

    Licensing: Free for clinical and educational use with citation. The full MDQ adds co-occurrence and impairment items that we capture conceptually in the results copy; these 13 symptom items drive the screening threshold.

  • PC-PTSD-5 — Primary Care PTSD Screen for DSM-5 Triage verified against source (2016-10-01)

    Prins A, Bovin MJ, Smolenski DJ, et al. The Primary Care PTSD Screen for DSM-5 (PC-PTSD-5): Development and Evaluation Within a Veteran Primary Care Sample. J Gen Intern Med. 2016;31(10):1206-11.

    Licensing: Free, public domain. US VA / National Center for PTSD.

  • SCOFF — SCOFF Eating-Disorder Screener Triage verified against source (1999-12-04)

    Morgan JF, Reid F, Lacey JH. The SCOFF questionnaire: assessment of a new screening tool for eating disorders. BMJ. 1999;319(7223):1467-8.

    Licensing: Free, public domain.

  • NIAS — Nine-Item Avoidant/Restrictive Food Intake Disorder Screen Triage needs clinician review

    Zickgraf HF, Ellis JM. Initial validation of the Nine Item Avoidant/Restrictive Food Intake Disorder Screen (NIAS): a measure of three restrictive eating patterns. Appetite. 2018;123:32-42.

    Licensing: Free for clinical and research use with citation. Three subscales (appetite / fear / picky), each 3 items scored 0-5. Recommended screening cutoffs: picky ≥ 10, appetite ≥ 10, fear ≥ 10. NIAS addresses ARFID, which SCOFF does not capture.

  • Mini-SPIN — Mini-Social Phobia Inventory Triage needs clinician review

    Connor KM, Kobak KA, Churchill LE, Katzelnick D, Davidson JRT. Mini-SPIN: A brief screening assessment for generalized social anxiety disorder. Depress Anxiety. 2001;14(2):137-40.

    Licensing: Free for clinical and research use with citation.

  • BDDQ — Body Dysmorphic Disorder Questionnaire Triage needs clinician review

    Phillips KA. The Broken Mirror: Understanding and Treating Body Dysmorphic Disorder. Oxford University Press; 1996. BDDQ derived from the Body Dysmorphic Disorder Diagnostic Module.

    Licensing: Free for clinical and research use with citation. Positive screen (possible BDD) requires all of: significant worry about appearance, preoccupation with the concern, functional impairment, and substantial time spent thinking about the defect. We use sum ≥ 3 as a sensitive gate; a clinician should follow up.

  • MSI-BPD — McLean Screening Instrument for BPD Triage needs clinician review

    Zanarini MC, Vujanovic AA, Parachini EA, Boulanger JL, Frankenburg FR, Hennen J. A screening measure for BPD: the McLean Screening Instrument for Borderline Personality Disorder (MSI-BPD). J Pers Disord. 2003;17(6):568-73.

    Licensing: Free for clinical and research use with citation.

  • HSP-12 — Highly Sensitive Person — short trait screener Triage needs clinician review

    Adapted from Aron EN, Aron A. Sensory-processing sensitivity and its relation to introversion and emotionality. J Pers Soc Psychol. 1997;73(2):345-68. Full 27-item scale at hsperson.com.

    Licensing: High Sensitivity is a personality trait, NOT a DSM diagnosis. Elaine Aron permits non-commercial use with citation. This 12-item subset preserves the trait structure; scoring is suggestive only — verify against the full scale at hsperson.com for any clinical decision.

  • ADYSL — Adult Dyslexia Checklist (Vinegrad, abridged) Triage needs clinician review

    Vinegrad M. A revised adult dyslexia checklist. Educare. 1994;48:21-23. Widely used in UK adult dyslexia assessment.

    Licensing: Free for educational use. This checklist is SUGGESTIVE ONLY — a formal dyslexia diagnosis requires a psychoeducational assessment by a qualified clinician.

  • AUDIT-C — AUDIT-C (Alcohol Use Disorders Identification Test — Consumption) Triage needs clinician review

    Bush K, Kivlahan DR, McDonell MB, Fihn SD, Bradley KA. The AUDIT alcohol consumption questions (AUDIT-C): an effective brief screening test for problem drinking. Arch Intern Med. 1998;158(16):1789-95.

    Licensing: Public domain — developed by WHO / US Veterans Affairs. Standard AUDIT-C cutoffs differ by sex (≥4 for men, ≥3 for women). We use the more sensitive ≥3 threshold for mild band so the screener does not assume a gender.

  • DAST-10 — Drug Abuse Screening Test — 10-item Triage needs clinician review

    Skinner HA. The drug abuse screening test. Addict Behav. 1982;7(4):363-71. DAST-10 derived in Yudko E, Lozhkina O, Fouts A. J Subst Abuse Treat. 2007;32(2):189-98.

    Licensing: Free for non-commercial clinical and research use with citation. Item 3 is reverse-scored (a 'No' answer counts as 1 point). Standard bands: 0 no problem, 1-2 low-level, 3-5 moderate, 6-8 substantial, 9-10 severe.

  • ISI — Insomnia Severity Index Triage needs clinician review

    Bastien CH, Vallières A, Morin CM. Validation of the Insomnia Severity Index as an outcome measure for insomnia research. Sleep Med. 2001;2(4):297-307.

    Licensing: Free for clinical and research use with citation. Standard bands: 0-7 no clinically significant insomnia, 8-14 subthreshold, 15-21 moderate, 22-28 severe.

  • PDSS-SR — Panic Disorder Severity Scale — Self-Report Triage needs clinician review

    Houck PR, Spiegel DA, Shear MK, Rucci P. Reliability of the self-report version of the Panic Disorder Severity Scale. Depress Anxiety. 2002;15(4):183-5.

    Licensing: Free for clinical and research use with citation. An item 1 answer of 0 (no panic attacks) means items 2-5 are conventionally left blank; we score them 0 so the triage flow can complete without branching. Cutoff ≥ 8 suggests clinically significant panic disorder.

Privacy

  • No accounts, emails, or IP addresses are stored.
  • A single anonymous session UUID lives in a cookie on your device.
  • Your session user-agent is stored only as a salted hash, used for duplicate/bot detection.
  • You can bookmark your results page to revisit it later.