《Table 7 Corre lation analysis of physiological inde xe s and n-back accuracy, NASA-TLX scores》

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《Comprehensive Assessment of Pilot Mental Workload in Various Levels》

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*Correlation is significant at the 0.05 level（2-tailed）；**Correlation is significant at the 0.01 level（2-tailed）.

The correlation analysis among the eye indexes show ed that the fixation indexes had an obvious correlation w ith the saccade indexes.Atα=0.05significance level，total fixation time w as negative correlated w ith total saccade time；atα=0.01significance level，total saccade time had a high positive correlation w ith saccade frequency（r=0.865，P<0.001）.Average fixation time w as negatively correlated w ith saccade frequency，total saccade time and blink rate，positive correlated w ith total fixation time，w hile average fixation time had a high negative correlation w ith saccade frequency and total saccade time（r=-0.802，P<0.001；r=-0.814，P<0.001）.We made a linear fitting betw een average fixation time and total saccade time（Fig.3），the total saccade time decreased with the increase of average fixation time（R2=0.663，linear fitting equation:y=-15.949x+16.084）.The correlation analysis w as show n in Table 8.