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Definition of variables |
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| Variable |
Definition |
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| Reaction time |
Mean reaction time (RT) for each cue and flanker condition |
| Hits |
Number of correct responses |
| Overall errors |
Number of overall errors |
| Wrong responses |
All other error responses than omissions, perservations and outliers |
| Omissions |
RT = 0 ms. |
| Perservations |
RT > 0 ms. < 100 ms. |
| Outliers |
Flanker × Cue RT - Stdev < 3*Stdev. RT = 0 can not be both omission and outlier and priority was given to omissions |
| Hits RT |
Median RT for correct responses |
| Hits RT SE |
Standard error of RT for correct responses. Measure of consistency of responses |
| Variability of SE |
Standard deviation of the 3 standard error values calculated for each block. Measures within respondent variability |
| Hits RT block change |
The slope of change in RT between blocks. Measure of vigilance |
| Hits SE block change |
The slope of change in standard error of RT between blocks. Measure of consistency and vigilance |
| Attention Networks |
Calculated both for RT and errors: |
| Alerting = RT/error for no cue - RT/error for double cue |
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| Orienting = RT/error for central cue - RT/error for orienting cue |
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| Conflict: = RT/error for incongruent flanker - RT/error for congruent flanker |
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Adólfsdóttir et al. Behavioral and Brain Functions 2008 4:9 doi:10.1186/1744-9081-4-9 |
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