I__. - International Military Testing Association

sensitivity to experimental effects, a z score was calculated
since it reflected both the magnitude and variability of measured
effects.
RESULTS
At 550 m + 22OC, performance rates were greatest for the
automated NC task since P-NC task was 87% of C-NC (See Table I).
Task definikiuil for the C-NC task was also better than its ImnUal
counterpart. The reliability of administrations during the
experimental and control conditions was greatest for the C-NC
task. The C-NC version of the NC task was also more sensitive to
altitude effects than the manual version of this performance task
as inferred from z score magnitudes.
TAB’-’ . ; i Prhrzrties of the paper-and-pencil (P-NC) and
automatea (C-NC) versions of the Number Comparison Task
at 550 m + 22OC and 4700 m + 15OC.
CRITERION
Baseline Rates
(correct/min)
Minutes Practice Required
(mln/admin)
Task Definition
(admin 5 and 6)
i
STATISTIC I P-NC : C-NC
8
BASELINE VALUES (550 m + 22OC)
Mean 25.13 28.78
Sigma 8.02 8.88
Mean 20 20
Pearson’s r .89 .94
Reliability Pearson’s r -81 . 91
(550 m vs. 4700 m)
ALTITUDE + COLD EFFECTS (4700 m + 17OC)
Altitude Effect Mean - 5.04 - 5.26
(change In correct/min) Sigma 5.08 4.07
z score - -99 - 1.29
336
.