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Table 1 Questionnaire data: NASA-TLX (means and standard deviations)

From: Visual search behavior and performance in luggage screening: effects of time pressure, automation aid, and target expectancy

Variables Low time pressure High time pressure
Manual Automation support Manual Automation support
Mental demand 12.52 (5.69) 12.88 (6.37) 14.70 (5.95) 15.45 (5.43)
Temporal demand 11.88 (6.20) 12.20 (5.42) 16.75 (3.92) 18.10 (2.45)
Performance 5.12 (4.29) 6.44 (4.58) 8.95 (5.49) 10.90 (5.03)
Effort 12.20 (4.83) 10.64 (6.09) 13.85 (4.11) 15.25 (4.29)
Frustration 6.12 (3.99) 6.76 (5.27) 12.00 (4.35) 12.95 (5.12)