___________________________________________________________________________________________________________________ *Patient Health Questionnaire (PHQ-9)* ___________________________________________________________________________________________________________________ Script Author: Katja Borchert, Ph.D. (katjab@millisecond.com) for Millisecond Software, LLC Date: 04-02-2021 last updated: 09-11-2023 by K. Borchert (katjab@millisecond.com) for Millisecond Software, LLC Script Copyright © 09-11-2023 Millisecond Softwaretware ___________________________________________________________________________________________________________________ BACKGROUND INFO ___________________________________________________________________________________________________________________ This script implements a computerized version of the Patient Health Questionnaire (PHQ-9) by Kroenke et al (2001). Reference: Kroenke, K., Spitzer, R. L., & Williams, J. B. W. (2001). The PHQ-9 - Validity of a brief depression severity measure. Journal of General Internal Medicine, 16, 606-613. ___________________________________________________________________________________________________________________ OVERVIEW ___________________________________________________________________________________________________________________ The scale consists of 9 4-point Likert scale items. ___________________________________________________________________________________________________________________ DURATION ___________________________________________________________________________________________________________________ the default set-up of the script takes < 1 min to complete. ___________________________________________________________________________________________________________________ DATA OUTPUT DICTIONARY ___________________________________________________________________________________________________________________ The fields in the data files are: (1) Raw data file: 'phq_9.iqdat' date, time: date and time script was run with the current group/subjectnumber subject, group, session: with the current subject/groupnumber/session id build: the Inquisit build q*_response: response given (in assigned values) Scale: q1-q9: 0 (Not at all) - 3 (Nearly every day) Scale: q10: 0 (Not difficult at all) - 3 (Extremely difficult) q*_latency: how much time (in ms) the participant spent on the surveyPage with this particular question (the last time this particular surveyPage was visited) (2) Summary data file: 'phq_9_summary.iqdat' (Inquisit Lab: one data file per participant) inquisit.version: Inquisit version run computer.platform: the platform the script was run on (win/mac/ios/android) startDate: date script was run startTime: time script was started subjectId: assigned subject id number groupId: assigned group id number sessionId: assigned session id number elapsedTime: time it took to run script (in ms); measured from onset to offset of script completed: 0 = script was not completed (prematurely aborted); 1 = script was completed (all conditions run) dePressedMoodOrAnhedonia: 1 = at least one answer for q1 (anhedonia) or q2 (depressed mood) was a '2' or a '3 (>= more than half the days) 0 = otherwise depressionSymptonsCounter: counts the number of '2' or '3' responses (>= more than half the days) for q1-q8 as well as any response other than 0 for q9 Major Depression if 1. 'DepressedMoodOrAnhedonia' = 1 AND 2. DepressionSymptonsCounter >= 5 Other Depression if 1. 'DepressedMoodOrAnhedonia' = 1 AND 2. 2 <= DepressionSymptonsCounter < 5 phq9SeverityScore: Total Score (adds up all valid response values from q1-q9; range: 0-27) 1-4 Minimal depression 5-9 Mild depression 10-14 Moderate depression 15-19 Moderately severe depression 20-27 Severe depression individual responses: scale: q1-q9: 0 (Not at all) - 3 (Nearly every day) scale: q10: 0 (Not difficult at all) - 3 (Extremely difficult) radioButtons.q1.response to q10 (*Note: q10 is only presented if participant has indicated any possible depression response (response > 0) for any of the nine questions. If all responses = 0, q10 is automatically scored with a 0) ___________________________________________________________________________________________________________________ EDITABLE CODE ___________________________________________________________________________________________________________________ check below for (relatively) easily editable parameters, stimuli, instructions etc. Keep in mind that you can use this script as a template and therefore always "mess" with the entire code to further customize your experiment. The parameters you can change are: