Return to the NASA Task Load Index page
___________________________________________________________________________________________________________________	

									NASA TASK LOAD INDEX- Survey (NASA TLX)
___________________________________________________________________________________________________________________	

last updated:  10-16-2019 by K. Borchert (katjab@millisecond.com) for Millisecond Software, LLC

Script Copyright © 10-16-2019 Millisecond Software

___________________________________________________________________________________________________________________
BACKGROUND INFO 	
___________________________________________________________________________________________________________________	
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.

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

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

___________________________________________________________________________________________________________________	
DATA FILE INFORMATION 
___________________________________________________________________________________________________________________	
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)