Based on our observations during testing and a post-hoc error analysis, we found that in subtraction children made more errors which were conceptually rather than procedurally based; such as application of an incorrect rule (x-x = x, or x-0 = 0), adding instead of subtracting, or simply not knowing how to proceed to calculate a response (particularly not knowing how to use their fingers to do so).
Split-5 errors describe errors in addition and subtraction problems that are deviating by +5 or −5 from the correct solution.
In addition, the unexpected baseline levels of 25(OH)D2 and subsequent subtraction may have introduced additional error in the determination of half-life.
Using spectral subtraction and source counting are useful for reducing localization error in SNRs lower than zero.
In order to introduce the best model, four criteria of "higher regression", "minimum errors", "minimum subtraction of errors summation" and "minimum sum of absolute subtractions of predicted and experimented toughness" were considered.
To minimise these quantification errors, voxel-based subtraction of post- and pre-therapy maps seems to be crucial.
For the two factors which showed no equalization of hand performance, the subtraction of Z-values was also carried out (number of errors in the aiming task = −0.03, number of hits in the tapping task = 0.06).
The validation routine in DeerAnalysis was then used to determine the background subtraction that produced the best fit to the dipolar evolution and to estimate likely errors in the distance distribution.
For all parameters that showed a strong equalization in performance with increasing age, the result of the subtraction was calculated by positive amounts (total time for the aiming task = 0.07, number of errors in the steadiness task = 0.025, number of errors and total time for the line tracing task = 0.013 and 0.024).
Since an RSA measurement is the result of a difference between the reference (e.g. postoperative) and current examination recordings, most of this systematic error should disappear in the subtraction process, and so this error component should be zero or very small.
In the subtraction task participants had to solve multi-column subtraction problems in standard right-to-left order.
