___________________________________________________________________________________________________________________ *TIMED LIKERT SCALE DEMO* ___________________________________________________________________________________________________________________ Author: Katja Borchert, Ph.D. (katjab@millisecond.com) for Millisecond Software, LLC Date: 02-20-2013 last updated: 03-02-2022 by K. Borchert (katjab@millisecond.com) for Millisecond Software, LLC Script Copyright © 03-02-2022 Millisecond Software ___________________________________________________________________________________________________________________ BACKGROUND INFO ___________________________________________________________________________________________________________________ This script implements a demonstration of a Timed Likert scale as used by: Ferrando, P.J. & Lorenzo-Seva, U. (2007). A Measurement Model for Likert Responses That Incorporates Response Time. MULTIVARIATE BEHAVIORAL RESEARCH, 42, 675–706. The likert scale implemented in this script has 5 anchors like the one used by Ferrando & Lorenzo-Seva (2007). According to the article "A five-point response is the upper limit recommended by Fazio (1990) when the information provided by the latencies is taken into account. (p.677/678)" NOTE: The build-in Inquisit likert scale used in this script does NOT let participants change their original response. ___________________________________________________________________________________________________________________ TASK DESCRIPTION ___________________________________________________________________________________________________________________ Participants are asked to select a response button on a five-point- Likert Scale in response to a given statement. The reciprocals of the reaction times (converted from ms to s, and corrected for large and small reaction times are calculated for each question (see Ferrando & Lorenzo-Seva, 2007) ___________________________________________________________________________________________________________________ DURATION ___________________________________________________________________________________________________________________ the default set-up of the script takes under a minute to complete. ___________________________________________________________________________________________________________________ DATA FILE INFORMATION ___________________________________________________________________________________________________________________ The default data stored in the data files are: (1) Raw data file: 'timedlikert_raw*.iqdat' (a separate file for each participant) computer.platform: the platform the script was run on (win/mac/ios/android) date, time: date and time script was run subject, group: with the current subject/groupnumber session: with the current session id blockcode, blocknum: the name and number of the current block (built-in Inquisit variable) trialcode, trialnum: the name and number of the currently recorded trial (built-in Inquisit variable) Note: trialnum is a built-in Inquisit variable; it counts all trials run; even those that do not store data to the data file such as feedback trials. Thus, trialnum may not reflect the number of main trials run per block. stimulusitem: the presented stimuli in order of trial presentation response: the participant's response (scancode of response buttons) latency: the response latency (in ms); measured from: onset of stim corrected_rt_s: corrected RT for large (>40) and small (< 0.5) reaction times (measured in seconds NOT ms) as suggested by Ferrando & Lorenzo-Seva (2007), p.689 reciprocal_rt_s: the inverse of the reaction times (measured in seconds NOT ms) (2) Summary data file: 'timedlikert_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) ___________________________________________________________________________________________________________________ CUSTOMIZE ITEMS ___________________________________________________________________________________________________________________ * Go to section EDITABLE STIMULI -> item.questions to edit/add items of interest * Go to ssection BLOCKS -> block.timedlikert to edit the number of times the likert trial needs to be called ___________________________________________________________________________________________________________________ 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: /questionfontsize: sets the fontsize of the question in canvas percentages (default: 5%)