TABLE 1.
Dependent variables for each of the perceptual and cognitive tasks and the direction of change indicative of improvement1
| Task/domain | Variable/change in value | Description |
|---|---|---|
| SRT/perception | Median RT/↓ | Median RT for correct responses |
| CTH/perception | HR/↑ | Proportion of correct responses to stimuli with nonzero contrast |
| FAR/↑ | Proportion of incorrect responses to stimuli with zero contrast | |
| d′/↑ | Sensitivity to the presence of contrast, d′ = Z−1(HR) − Z−1(FAR) | |
| c/? | Propensity to report the presence of contrast, independent of the state of the stimulus, c = −0.5 × [Z−1(HR) + Z−1(FAR)] | |
| τ/↓ | Lowest amount of contrast (in percentage of contrast) required for the observer to correctly report the presence of contrast | |
| TTH/perception | HR/↑ | Proportion of correct responses to stimuli with nonzero exposure durations |
| FAR/↓ | Proportion of incorrect responses to stimuli with zero exposure duration | |
| d′/↑ | Sensitivity to the presence of stimuli with nonzero exposure duration, calculated as above | |
| c/? | Propensity to report the presence of stimuli, independent of the exposure duration, calculated as above | |
| τ/↓ | Shortest exposure duration (in ms) required for the observer to correctly report the presence of the stimulus | |
| ANT/attention | RT, 0 cues/↓ | RT0: Median RT (in ms) for correct responses to stimuli with 0 cues |
| RT, 2 cues/↓ | RT2: Median RT (in ms) for correct responses to stimuli with 2 cues | |
| Alerting/↑ | RT0 − RT2 | |
| RT, center cues/↓ | RTc: Median RT (in ms) for correct responses to stimuli with center cues | |
| RT, spatial cues/↓ | RTs: Median RT (in ms) for correct responses to stimuli with spatial cues | |
| Orienting/↑ | RTc − RTs | |
| RT, consistent flankers/↓ | RTn: Median RT (in ms) for correct responses to stimuli with consistent flankers | |
| RT, inconsistent flankers/↓ | RTi: Median RT (in ms) for correct responses to stimuli with inconsistent flankers | |
| Conflict/↓ | RTn − RTi | |
| CFE/attention, memory | RT/↑ | Median RTs, interaction contrast (in ms): (FA − FM) − (UA − UM) |
| HR/↑ | Proportion of trials on which person 1 was cued that were judged to be person 1, interaction contrast: (FM − FA) − (UM − UA) | |
| FAR/↑ | Proportion of trials on which person 2 was cued that were judged to be person 1, interaction contrast: (FA − FM) − (UA − UM) | |
| d′/↑ | Sensitivity to the presence of person 1, calculated as above, interaction contrast: (FM − FA) − (UA − UM) | |
| c/? | Bias to respond person 1 independent of the cued identity, calculated as above, interaction contrast: (FM − FA) − (UM − UA) | |
| CRT/memory | RT, 4 cues/↑ | Median RT for correct responses to stimuli presented with all 4 quadrants visible |
| HR, 4 cues/↑ | Proportion of old items with all 4 quadrants visible correctly identified as old | |
| FAR, 4 cues/↓ | Proportion of new items with all 4 quadrants visible incorrectly identified as old | |
| d′, 4 cues/↑ | Sensitivity to the presence of old items with all 4 quadrants visible, calculated as above | |
| c, 4 cues/↑ | Propensity to identify a stimulus with all 4 quadrants visible as old, independent of the state of the stimulus, calculated as above | |
| PCC/↑ | Percentage of change in capacity, based on the proportionality estimated β obtained from the proportional hazards model, (eβ − 1) × 100 |
1
A, aligned; ANT, attentional network task; c, bias; CFE, composite face effect task; CRT, cued recognition task; CTH, contrast threshold task; d′, sensitivity; F, familiar; FAR, false-alarm rate; HR, hit rate; M, misaligned; PCC, proportional change in capacity; RT, response time; SRT, simple reaction time task; TTH, temporal threshold task; U, unfamiliar; Z−1, inverse normal transformation; τ, threshold; ↑, increase in the value of the variable indicates improvement; ↓, decrease in the value of the variable indicates improvement; ?, neither increase nor decrease in the value of the variable indicates improvement.