Return to the Timed Likert Scale page

Author: Katja Borchert, Ph.D. ( for Millisecond Software, LLC
Date: 02-20-2013
last updated: 02-03-2016 by K.Borchert ( for Millisecond Software LLC

Copyright © 02-03-2016 Millisecond Software


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.

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)"

The build-in Inquisit likert scale used in this script does NOT let participants change their original response. 

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)

The default data stored in the data files are:

(1) Raw data file: 'TimedLikert_raw*.iqdat' (a separate file for each participant)

build:							Inquisit build
computer.platform:				the platform the script was run on
date, time, subject, group:		date and time script was run with the current subject/groupnumber 
blockcode, blocknum:			the name and number of the current block
trialcode, trialnum: 			the name and number of the currently recorded trial
									(Note: not all trials that are run might record data; by default data is collected unless /recorddata = false is set for a particular trial/block) 
stimulusitem:					the presented stimuli in order of trial presentation
response:						the participant's response
latency: 						the response latency (in ms)
/rt:							contains the latency of the current response in ms
/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)

script.startdate:				date script was run
script.starttime:				time script was started
script.subjectid:				subject id number
script.groupid:					group id number
script.elapsedtime:				time it took to run script (in ms)
computer.platform:				the platform the script was run on
/completed:						0 = script was not completed (prematurely aborted); 1 = script was completed (all conditions run)

* 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

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%)

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