Perception of Symmetrically Distributed Weight on the Head
HUMAN ENGINEERING LAB ABERDEEN PROVING GROUND MD
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Thirty-eight enlisted men, 18 ordnance and 20 infantrymen, judged whether experimentally weighted helmets were heavier, lighter or the same weight as the reference M1 helmet. The findings indicate a lower difference threshold of 2.0 pounds and an upper difference threshold of 3.85 pounds for the combined groups. The ordnance groups lower difference threshold was 2.25 pounds, while the Infantry groups lower threshold was 1.8 pounds. The upper threshold for the ordnance group was calculated to be 3.9 pounds, while the infantry groups upper threshold was 3.8 pounds. The differences were statistically significant. It was concluded that complaints about the present helmet being too heavy are not based on particularly accurate perception of weight on the head and that infantrymen are not as accurate in their judgments of weight on the head as the soldier with less field experience with the M1 helmet.
- Human Factors Engineering and Man Machine Systems