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. 2014 Nov 8;47(4):1065–1075. doi: 10.3758/s13428-014-0522-7

Table 1.

Averages, standard deviations (between round brackets), and 95 % confidence intervals (between square brackets) of a healthy sample and a neglect patient sample, collected using 1280×1024 pixels Landolt C cancellation tasks with 64 targets and 128 distractors, invisible cancellation markings, and a time limit of 2 min

Healthy sample (N=10) Neglect sample (N=10)

Omissions

(total)

2.5 (2.0) 41.6 (12.6)
[1.3, 3.7] [33.8, 49.4]
Omissions in left half 1.4 (1.6) 27 (6.6)
[0.4, 2.4] [22.9, 31.1]
Omissions in right half 1.1 (1.2) 14.6 (7.3)
[0.4, 1.8] [10.1, 19.1]]

Revisits

(total)

2.3 (3.7) 27.8 (18.3)
[0.0, 4.6] [16.5, 39.1]
Immediate revisits 0.6 (1.1) 12 (20.7)
[-0.1, 1.3] [-0.8, 24.8]
Delayed revisits 1.7 (2.7) 15.8 (13.3)
[0.0, 3.4] [7.5, 24.1]
Horizontal center of cancellation 0.04 (0.02) 0.55 (0.31)
[0.03, 0.06] [0.36, 0.75]
Vertical center of cancellation 0.13 (0.03) 0.01 (0.11)
[0.11, 0.14] [-0.06, 0.07]

Task duration

(sec.)

76.2 (14.3) 116.1 (6.9)
[67.3, 85.1] [111.8, 120.4]

Mean inter-cancellation time

(sec.)

1.17 (0.19) 2.48 (0.87)
[1.06, 1.29] [1.95, 3.02]
Q score 0.80 (0.14) 0.09 (0.08)
[0.71, 0.89] [0.04, 0.14]

Mean inter-cancellation distance

(pixels)

210.6 (32.7) 235.0 (40.6)
[190.3, 230.9] [209.9, 260.2]
Standardized inter-cancellation distance 2.30 (0.40) 2.57 (0.48)
[2.05, 2.55] [2.28, 2.87]

Speed

(cancellations per second)

0.18 (0.03) 0.11 (0.04)
[0.16, 0.20] [0.08, 0.13]
Mean inter-cancellation angle 41.1 (29.8) 57.1 (13.0)
[22.6, 59.5] [49.0, 65.2]
Standardized inter-cancellation angle 0.74 (0.07) 0.64 (0.07)
[0.70, 0.78] [0.59, 0.68]
Best R 0.99 (0.01) 0.50 (0.29)
[0.99, 0.99] [0.32, 0.68]
Path intersections 1.2 (2.1) 19.3 (20.5)
[-0.1, 2.5] [6.6, 32.0]
Intersection rate 0.02 (0.04) 0.44 (0.43)
[0.00, 0.04] [0.18, 0.71]

First cancellation x-coordinate

(standardized space)

0.03 (0.00) 0.77 (0.20)
[0.03, 0.03] [0.64, 0.89]

First cancellation y-coordinate

(standardized space)

0.06 (0.01) 0.32 (0.17)
[0.06, 0.06] [0.22, 0.43]