Table 1.
Corrective Saccades |
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Subject | Clamp Size, Degrees | Inherent Hypometria, Degrees | Gain Change, % | Amplitude | Frequency, % | Latency, ms |
A | 0.7 | 0.80 | −4.13 | 0.49 ± 0.19 | 28 | 349.65 ± 64.65 |
B | 0.7 | 0.66 | 6.51 | 0.38 ± 0.13 | 72 | 260.29 ± 57.11 |
C | 0.7 | 1.84 | −4.90 | 0.48 ± 0.21 | 67 | 288.90 ± 95.38 |
D | 0.7 | 2.66 | −11.90 | 0.39 ± 1.34 | 60 | 249.41 ± 63.25 |
E | 0.7 | 1.02 | −6.25 | 0.59 ± 0.73 | 54 | 279.96 ± 99.64 |
F | 0.7 | 4.83 | −12.55 | 0.41 ± 0.14 | 65 | 366.23 ± 72.55 |
G | 0.7 | 1.23 | −7.53 | 0.59 ± 0.16 | 64 | 328.37 ± 82.34 |
H | 0.7 | 0.71 | −0.27 | 0.42 ± 0.14 | 67 | 273.38 ± 72.77 |
I | 0.7 | 0.93 | 0.71 | 0.56 ± 0.18 | 55 | 340.01 ± 71.68 |
J | 0.7 | 2.98 | −11.68 | 0.57 ± 0.17 | 53 | 288.65 ± 79.78 |
K | 0.7 | −0.53 | −10.07. | 0.38 ± 0.45 | 53 | 343.75 ± 80.79 |
L | 0.5 | 1.86 | −6.14 | 0.31 ± 0.45 | 77 | 252.61 ± 57.36 |
1.0 | 2.75 | −0.50 | 0.42 ± 0.13 | 75 | 259.01 ± 56.04 | |
2.0 | 1.04 | 8.20 | 1.43 ± 0.21 | 99 | 191.33 ± 28.61 |
Corrective saccade amplitude values are medians ± semi-interquartile deviations (SID) across the 6 adaptation blocks; latency values are means ± SD. Measured latencies are reasonable given the corresponding corrective saccade amplitudes (Becker 1989). As discussed in text, subject K had both hypometric and hypermetric saccades. When all hypermetric saccades were removed, the inherent hypometria was calculated to be 1.06° and the gain change to be −5.72%.