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NameTaskDateMentalDemandHowmentallydemandingwasthetask?PhysicalDemandHowphysicallydemandingwasthetask?TemporalDemandHowhurriedorrushedwasthepaceofthetask?PerformanceHowsuccessfulwereyouinaccomplishingwhatyouwereaskedtodo?EffortHowharddidyouhavetoworktoaccomplishyourlevelofperformance?FrustrationHowinsecure,discouraged,irritated,stressed,andannoyedwereyou?Figure8.6NASATaskLoadIndexHartandStaveland’sNASATaskLoadIndex(TLX)methodassessesworkloadonfive7-pointscales.Incrementsofhigh,mediumandlowestimatesforeachpointresultin21gradationsonthescales.VeryLowVeryHighVeryLowVeryHighVeryLowVeryHighVeryLowVeryHighPerfectFailureVeryLowVeryHigh