A new measure of group decision-making efficiency

Cognitive Research: Principles and Implications

Table 2 Mean correct response time (RT) and accuracy for all the combinations of social condition and contrast level

	25.0%	17.0%	13.5%	11.5%	Average
RT (seconds)
Worse observer	0.532 (0.056)	0.608 (0.081)	0.692 (0.079)	0.710 (0.097)	0.636 (0.104)
Better observer	0.479 (0.067)	0.528 (0.057)	0.571 (0.058)	0.600 (0.063)	0.545 (0.074)
Collaboration	0.506 (0.052)	0.565 (0.064)	0.629 (0.068)	0.654 (0.070)	0.589 (0.084)
average	0.506 (0.060)	0.567 (0.073)	0.631 (0.082)	0.655 (0.087)
Accuracy
Worse observer	0.95 (0.04)	0.81 (0.08)	0.62 (0.07)	0.52 (0.04)	0.72 (0.18)
Better observer	0.97 (0.02)	0.89 (0.04)	0.68 (0.06)	0.56 (0.04)	0.78 (0.17)
Collaboration	0.97 (0.03)	0.87 (0.07)	0.70 (0.07)	0.54 (0.02)	0.77 (0.17)
average	0.96 (0.03)	0.86 (0.07)	0.67 (0.07)	0.54 (0.03)