Abstract
Variance in the length of Morse code signal components was studied by applying the analysis of variance technique to the cipher sending of 8 inexperienced and 5 expert operators. Significant differences in component length were consistently found in different contextual locations. Expert operators tended to have less variation than inexperienced operators, both in different signal contexts and in repetitions of a given signal context. Variations in component length appear to be a function of both movement compounding and perceptual distortion.
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