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APDF |
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15) an APDF is the cumulative sum of a variable--in this case, lumbar spine position--over time. APDF is an international group that works to elevate the standards of professional business practices for design firms. This analysis indicated that a minimum of 15 subjects was necessary in a repeated-measures design of one independent variable (keyboard slope angle) with 4 levels (slope angles) to detect a difference of 5% MVC for 50th percentile APDF of forearm RMS EMG activity between pairs of keyboard slopes. |
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