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Table 2. 

Behavioral Results as a Function of Task and Group (Early Blind vs. Controls) with Mean Reaction Times (RT) and Proportion of Correct Responses (PC) and Their Standard Errors (in Parentheses)


Tactile Duration Discrimination
Auditory Duration Discrimination
Controls
Early BlindControls
Early Blind
RT (msec)
PC (%)
RT (msec)
PC (%)
RT (msec)
PC (%)
RT (msec)
PC (%)
Validly cued 855 (25) 76.5 (3.6) 766 (25) 85.7 (3.6) 732 (23) 91.2 (1.7) 670 (23) 95.2 (1.7) 
Invalidly cued 871 (25) 75.1 (3.3) 780 (25) 86.2 (3.3) 745 (22) 89.5 (1.6) 679 (22) 95.9 (1.6) 
No-cue 892 (23) 73.4 (3.2) 794 (23) 84.9 (3.2) 754 (24) 91.8 (1.5) 672 (24) 96.9 (1.5) 
Δ cue 16*** −1.4 14*** 0.5 14** −0.7 9* 0.7 
Δ warn 29** −2.4* 21* −1.1 15* 1.4** −3 1.3*** 

Tactile Duration Discrimination
Auditory Duration Discrimination
Controls
Early BlindControls
Early Blind
RT (msec)
PC (%)
RT (msec)
PC (%)
RT (msec)
PC (%)
RT (msec)
PC (%)
Validly cued 855 (25) 76.5 (3.6) 766 (25) 85.7 (3.6) 732 (23) 91.2 (1.7) 670 (23) 95.2 (1.7) 
Invalidly cued 871 (25) 75.1 (3.3) 780 (25) 86.2 (3.3) 745 (22) 89.5 (1.6) 679 (22) 95.9 (1.6) 
No-cue 892 (23) 73.4 (3.2) 794 (23) 84.9 (3.2) 754 (24) 91.8 (1.5) 672 (24) 96.9 (1.5) 
Δ cue 16*** −1.4 14*** 0.5 14** −0.7 9* 0.7 
Δ warn 29** −2.4* 21* −1.1 15* 1.4** −3 1.3*** 

Cross-modal cueing effects on RT and PC are reflected in the difference between validly and invalidly cued target locations (Δ cue), whereas no-cue conditions indicate that the target stimulus was not preceded by a cue. A comparison of the no-cue condition with the mean of the cue conditions (Δ warn) indicates whether responses were faster (positive) or more accurate (negative) due to alerting effects of the cue. Results of one-tailed t tests [the predicted direction is invalidly cued > validly cued, and no-cue > (validly cued + invalidly cued)/2] are additionally indicated.

*p < .05.

**p < .01.

***p < .005.

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