User Manual: Inquisit NASA Task Load Index


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									NASA TASK LOAD INDEX- Survey (NASA TLX)
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last updated:  10-02-2020 by K. Borchert (katjab@millisecond.com) for Millisecond Software, LLC

Script Copyright © 10-02-2020 Millisecond Software

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BACKGROUND INFO 	
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This script implements the NASA TASK LOAD INDEX a tool to assess perceived workload 

References:
NASA (1986). Nasa Task Load Index (TLX) v. 1.0 Manual

Hart, S. (2006). Nasa-Task Load Index (Nasa-TLX); 20 Years Later. Human Factors and Ergonomics Society 
Annual Meeting Proceedings, 50, 904-908.

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OVERVIEW
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The NASA TLX consists of six subscales: 
Mental Demands, Physical Demands, and Temporal Demands, Frustration, Effort, and Performance	

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DURATION 
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the default set-up of the script takes less than a minute to complete

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DATA FILE INFORMATION 
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The default data stored in the data files are:

Raw data file: 'nasatlx.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: 1 (very low) - 21 (very high)
									
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: 'nasatlx_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)

textbox.name.response:			entered name 
textbox.date.response:			entered date 
textbox.task.response:			entered task

Raw responses on the sliders:
slider.effort.response, 
slider.frustration.response, 
slider.mentaldemand.response,
slider.performance.response, 
slider.physicaldemand.response, 
slider.temporaldemand.response