___________________________________________________________________________________________________________________ INTERPERSONAL REACTIVITY INDEX (IRI) ___________________________________________________________________________________________________________________ Script Author: Katja Borchert, Ph.D. (katjab@millisecond.com) for Millisecond Software, LLC Date: 07-28-2016 last updated: 02-23-2022 by K. Borchert (katjab@millisecond.com) for Millisecond Software, LLC Script Copyright © 02-23-2022 Millisecond Software ___________________________________________________________________________________________________________________ BACKGROUND INFO ___________________________________________________________________________________________________________________ This script implements a computerized version of the Interpersonal Reactivity Index (IRI) as described in: Davis, M.H. (1979). INDIVIDUAL DIFFERENCES IN EMPATHY: A MULTIDIMENSIONAL APPROACH. Dissertation (Scales published on p. 52). Davis, M. H. (1983). Measuring individual differences in empathy: Evidence for a multidimensional approach. Journal of Personality and Social Psychology, 44, 113– 126. ___________________________________________________________________________________________________________________ OVERVIEW ___________________________________________________________________________________________________________________ 28 5-point Likert questions on 4 subscales (7 question per subscale) with two anchors (A=Does not describe me well; E=Describes me very well). ___________________________________________________________________________________________________________________ DURATION ___________________________________________________________________________________________________________________ the default set-up of the script takes appr. 4 minutes to complete ___________________________________________________________________________________________________________________ DATA FILE INFORMATION ___________________________________________________________________________________________________________________ The default data stored in the data files are: (1) Raw data file: 'iri.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: 0 (does not describe me well) - 4 (describes me well) R = automatically reversed scored questions 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: 'iri_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) 4 subscales (reversed scoring automatically done by computer) - Min: 0 - Max: 28 on each scale PerspectiveTaking: the tendency to spontaneously adopt the psychological point of view of others Fantasy: taps respondents' tendencies to transpose themselves imaginatively into the feelings and actions of fictitious characters in books, movies, and plays EmpathicConcern: assesses "other-oriented" feelings of sympathy and concern for unfortunate others PersonalDistress: measures "self-oriented" feelings of personal anxiety and unease in tense interpersonal settings ___________________________________________________________________________________________________________________ QUESTIONNAIRE SET-UP & SCORING ___________________________________________________________________________________________________________________ paper and pencil questionnaire: http://fetzer.org/sites/default/files/images/stories/pdf/selfmeasures/EMPATHY-InterpersonalReactivityIndex.pdf 28 5-point Likert Scale (A, B, C, D, E) Scoring: (Note: computer scores reversed scored questions are automatically) A = 0 B = 1 C = 2 D = 3 E = 4 Subscales (taken from Davis, 1983, p. 113): Perspective Taking – the tendency to spontaneously adopt the psychological point of view of others Fantasy – taps respondents' tendencies to transpose themselves imaginatively into the feelings and actions of fictitious characters in books, movies, and plays Empathic Concern – assesses "other-oriented" feelings of sympathy and concern for unfortunate others Personal Distress – measures "self-oriented" feelings of personal anxiety and unease in tense interpersonal settings ___________________________________________________________________________________________________________________ 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: 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.