NESTLE procedure

Some plots are visible in the chronophoresis and the NESTLE procedure (e.g. vlllO07A). What does that mean Is there some mathematical reason for two numbers appearing together  

Gesine s observation patients tend to put 3 fingers at the keyboard. The mono-hemispheric performance in visual tasks is not controlled. The sound volume in auditory tasks is not controlled. The influences on the elementary time are not investigated sufficiently. 

---

The NESTLE procedure applied to a 5 millisecond time scale of reaction times (program FPM31e, procedure NESTLE)... 

Within the program FPM the NESTLE procedure computes the difference abs((con+ o ET)-peak(n)) for each possible elementary time, ET, and for each peak(n) with abs = absolute value, con = constant value (either 70ms in auditory tasks or 120ms in visual tasks), o is that iwfeger which minimizes the above difference, o" ET is an integer multiple of the elementary time, the term (con + o ET) approximates the reaction time of the peak(n) with a minimial remaining difference (it NESTLEs to the reaction time of peak(n)). 

The subjects with distinct peaks in the natural distribution, however, offer an additional chance to measure their elementary times. In principle, at least two different methods (Chronophoresis, FPM, natural distribution, repetitions) should show coincident results in one subject. In some subjects, the distribution of reaction times on a 1 millisecond time scale shows distinct peaks which can be used by the NESTLE procedure. 

Fig. 40. Construction of the NESTLE procedure in an example. All values apart from the...

The minimal sums of the NESTLE procedure are read from the left part of the above figure (arrows) and registered within the table below. If there is no clear minimum, a question mark is put into the corresponding box of the table. 

The quality of the NESTLE procedure in FPM26f58 depends on the localisation of the peaks in the 1ms distribution. The version FPM2632a uses artificial latencies to show the results of the NESTLE procedure. 

This is true, too, for the nestling procedure in the xNNy distribution where the peaks which lie at the extreme right side of the distribution may be not so reliable as the peaks which lie at the left side of the distribution. 

Is it possible that chronophoresis and NESTLE procedure give the double elementary time. ... 

In rrinciple there could be three different elementary times within one task an elementary time of the linear pathway, an elementary time of the cyclical pathway searching on the sensory area and an elementary time of the cyclical pathway searching on the motor area. As is proven in the chapter about simulation, the nestle procedure is able to detect different elementary times hidden within reaction times. The existence of the above extra elementary time could be due to reality. The other possibility is the artificial charakter of this additional elementary time. The evaluation programs tend to produce additional values standing in a mathematical relation with the real elementary time (see extra plots within the chronophrosis). The final decision has not been made whether these additional values represent some reality or are artificial products of the evaluation programs. 

It remains the question whether the prolonged elementary time is caused by an extra plot. These extra plots are methodical artifacts of the nestle procedure in the FPM and SINGLE programs. In order to answer that question, the prolonged elementary time should not have a mathematical relationship to the normal elementary time like the extraplots to the normal plot. And control tasks (either the con-... 

The comparison between the two data sets has two main objectives. First the elementary time of the reaction time data should be replicable by the ERP data and second the common linear pathway should be seen in the ERP data. The first objective can be reached by taking the latencies as the input of the NESTLE procedure. The second objective can be reached by attaching the latencies to the hypothetical structure of the cortex. The boundary between linear pathway and cyclical pathway would be marked by the transition from 3 step rhythm of the linear pathway to the 2 step rhythm of the searching set. 

Computing the elementary times with ERPET15. This program applies the NESTLE procedure to the latencies of the ERP data. Because of the symmetry between ET(aNNr) and ET(aNNl) in healthy subjects, this principle is used to select these values which occur at both sides. Addionally the values near 20 are omitted. Most values are cycle times CT = 2ET. Table 37. The column ERP(a22y) contains the results of the NESTLE procedure (within the program ERPET15), the column eaETy contains the elementary time calculated from the ERP data, the column aETy the elementary time calculated from reaction time data ... 

The NESTLE procedure applied to the ERP latencies frequently produces a second result at 20ms ( 2ms)... 

This is the 50Hz artifact. The recording of event-related potentials was rendered more difficult by these artifacts which are due to the 50Hz-frequency of the alternating current in the laboratory. The NESTLE procedure can find these periods which have a length of 1000ms / 50 = 20ms. 

The NESTLE procedure finds this elementary time at 16ms. The inaccuracy is 0ms. 

---