___________________________________________________________________________________________________________________ MICHIGAN ALCOHOL SCREENING TEST (MAST) - original ___________________________________________________________________________________________________________________ Author: Katja Borchert, Ph.D. (katjab@millisecond.com) for Millisecond Software, LLC Date: 02-04-2013 last updated: 02-24-2022 by K. Borchert (katjab@millisecond.com) for Millisecond Software, LLC Script Copyright © 02-24-2022 Millisecond Software ___________________________________________________________________________________________________________________ BACKGROUND INFO ___________________________________________________________________________________________________________________ This script implements the original Michigan Alcohol Screening Test (MAST) with 25 YES/NO questions* for a self-assessment of social and vocational issues related to heavy drinking as published in: It was published by: Selzer, M.L. (1971). The Michigan Alcoholism Screening Test: The quest for a new diagnostic instrument. Am J Psychiatry, 127, 1653-1658. * The wording for question 1, 3, 11, 12 was slightly modified for this script ___________________________________________________________________________________________________________________ OVERVIEW ___________________________________________________________________________________________________________________ Questionnaire with 25 binary yes-no questions. ___________________________________________________________________________________________________________________ DURATION ___________________________________________________________________________________________________________________ the default set-up of the script takes appr. 2 minutes to complete ___________________________________________________________________________________________________________________ DATA FILE INFORMATION ___________________________________________________________________________________________________________________ The default data stored in the data files are: (1) Raw data file: 'mast.iqdat' (a separate file for each participant) The raw questionnaire data are saved under "MAST.iqdat" numeric scores are saved in values.q1-values.q22 in MAST_summary.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: yes - no (Note: the numeric responses are stored in the summary data file, responses can be weighted, see section Editable Parameters) 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: 'mast_summary*.iqdat' (a separate file for each 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) Summarydata for each participant: file saves the scores for the Total Score as well as the scores for individual items (responses are reversed scored were appropriate) totalscore: sum of all responses (The higher, the higher the 'alcoholic' response pattern) ___________________________________________________________________________________________________________________ SCORING ___________________________________________________________________________________________________________________ T alcoholic responses to the different questions are weighted, with the least discriminatory alcoholic responses receiving a 1, more serious discriminatory responses receiving a 2, and diagnostic responses receiving a 5 Go to "Editable Parameters" to check/edit the default scoring for this questionnaire Interpretation (Selzer, 1971) * Totalscore <= 3: nonalcoholic * Totalscore = 4 : suggestive of alcoholism * Totalscore > 4: alcoholism ___________________________________________________________________________________________________________________ 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: q1maxscore....q25maxscore: the (maximum) score for the alcoholic response