I__. - International Military Testing Association

Sample
METHOD
The sample consisted of 911 recruits initially selected as
11X Infantrymen based on a minimum CO composite score of 85 who
were then classified as 11H TOW gunners. For the present
purposes, the 11Hls were assumed to have been randomly chosen
from 11X's and therefore contain the same properties as the 11X
population. In order to test this assumption, t-tests were
conducted comparing the AFQT and CO mean scores of the current
sample (AFQT M=56.66, co $$=109.71) with those of a sample of'
17,000 11X's (AFQT &=57.82, Co IJ=110.22) and there were no
significant differences in the means. Because of this
comparability, the current sample of 11H's were considered to be
representative of the total 11X population.
Procedure
Recruits were given the Two-hand Tracking test along with
other psychomotor measures during in-processing at the Reception
Battalion. Classification of the examinees into specific MOS was
not based on Two-hand Tracking scores. The procedure for
assignment appears to be based on demand from each of four
possible assignment MOS. During TOW gunnery training, gunnery
data were collected using high-fidelity gunnery simulators.
Measures
Two-hand Tracking. This test measures two-hand coordination on a
scale of distance from target accuracy. This score has been
standardized (T distribution) and inverted such that a higher
score indicates better performance than a lower score.
Combat. This composite is the sum of four standardized ASVAB
subtests: Arithmetic Reasoning (AR), Auto and Shop Information
(ASI t Coding Speed (CS) and Mechanical Comprehension (MC). A
score of at least 85 is needed to qualify for the 11X MOS.
Combined Score. This is the optimally weighted predicted
composite of both Two-hand Tracking and Combat.
Training course performance. The criterion scores indicate
performance on a TOW anti-tank gunnery simulator which requires
the gunner to track a moving target (i.e., a target mounted on a
moving vehicle) through an infrared optical device. The two
measures of interest in the present study include Event 3, the
trainee's score on the first qualifying set (an index of time on
target) and Pass 3, whether the trainee passed or failed on the
first qualifying set.
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