Table 2.
| Group means (SD) | TD 4–6 yr N=10 |
TD 7–9 yr N=12 |
TD 10–15 yr N=8 |
CP 6–9 yr N=4 |
CP 10–16 yr N=6 |
Significance omnibus | |
|---|---|---|---|---|---|---|---|
| Age | 5yr 9mo | 8yr 5mo | 12yr 3mo | 7yr 5mo | 13yr 3mo | ||
|
(2
tasks)
(average#trials/subject) |
N=8
(36.1) |
N=12
(41.7) |
N=8
(50.4) |
N=4
(37) |
N=6
(46.7) |
Eye F(4,35)= |
|
| Eye RT (ms) |
380 ms (207) |
360 ms (170) |
340 ms (123) |
277 ms (131) |
336 ms (171) |
1.14 | p=.3543 |
| Eye MT (ms) |
97 ms (11.8) |
99 ms (13) |
97 ms (10.2) |
95 ms (8) |
96 ms (11) |
1.18 | p= .3376 |
| Eye amplitude (degrees) |
11.06 (2.08) |
9.64 (1.39) |
9.62 (1.46) |
8.76 (1.33) |
8.50 (1.62) |
18.25 | p < .0001 * |
| Eye accuracy (mm) |
−.87 (5.7) |
−1.08 (6.9) |
−1.23 (5.7) |
−.11 (5.4) |
−.39 (7.9) |
.34 | p = .8492 |
| % saccadic intrusions |
60.4 (27.4) |
31.1 (14.5) |
14.2 (14.9) |
85.5 (20.5) |
58.5 (33.6) |
19.456 | p < .0005 * |
| Head (2 tasks) | Head F(4,35)= |
||||||
| Head azimuth (degrees) |
7.0 (6.1) |
4.8 (4.6) |
3.0 (3.1) |
7.7 (6.4) |
5.0 (5.1) |
12.62 | p < .0001 * |
| View distance (cm) |
34.94 (4.68) |
39.79 (3.41) |
39.79 (3.78) |
40.99 (5.03) |
40.86 (2.86) |
17.00 |
p < .0001 * TD 4–6 sig less than all others |
|
Hand parameters
Eye-Hand task |
Hand F(4,35)= |
||||||
|
N=subjects per group
(average # trials/subject) |
N=8
(16.9) |
N=12
(20.4) |
N=8
(25.9) |
N=4
(17.25) |
N=6
(23) |
||
| Hand RT |
667 ms (250) |
492 ms (123) |
412 ms (96) |
645 ms (169) |
584 ms (159) |
12.62 | p < .0001 * |
| Hand MT |
539 ms (178) |
484 ms (134) |
441 ms (96) |
803 ms (204) |
620 ms (153) |
21.03 | p < .0001 * |
| Hand amplitude (resultant x,y,z) |
30.3 cm (4.91) |
37.5 cm (4.23) |
39.7 cm (8.94) |
41.5 cm (6.79) |
42.2 cm (7.31) |
12.18 |
p < .0001 * TD 4–6 sig less than all others |
| Hand peak velocity (m/sec) |
1.49 (.55) |
1.92 (.47) |
1.98 (.45) |
1.67 (.43) |
1.69 (.52) |
1.91 | p=.1306 |
| Hand submovements (zero acceleration crossings) |
4.54 (2.26) |
3.79 (1.75) |
3.57 (1.53) |
8.06 (2.42) |
5.40 (2.67) |
15.13 | p < .0001 * |