Black Box IEEE 1284 Betriebsanweisung PDF herunterladen (Seite 88)

Page 88 of 98 The Black Box Toolkit

9.3. The effect of using a TFT with various response devices

TFTs whilst not suffering from the inherent problems of being tied to refresh rate for

display duration do suffer from response time effects. It should be noted that data

projectors also suffer from response time artefacts but to a much greater degree on certain

models. Here in a short follow-on from the case study outlined in the previous section we

examine the effects of using a TFT for stimulus display. Once again the paradigm remains

unaltered and no settings were changed in E-Prime. These results are simply a result of

changing the physical display device. Again visual presentation should have terminated on

detection of a response and reaction time should have been 300 milliseconds.

Here we can see the timing performance of the same OEM Mouse as tested earlier.

However unlike the Data Analyser plot when testing with a standard CRT, display times

are made up of a discrete on period rather than a series of refresh blocks. The

spreadsheet duration for line 3 also shows a constant illumination period.

Again it is useful to summarise the performance for the poorest and best performing

response device when used with a TFT.

1 2 ... 83 84 85 86 87 88 89 90 91 92 93 ... 97 98

Keine Kommentare

Black Box IEEE 1284 Betriebsanweisung Seite 88