Black Box IEEE 1284 Betriebsanweisung PDF herunterladen (Seite 82)

Page 82 of 98 The Black Box Toolkit

By examining reaction times we can see that the E-Prime recorded times far longer than

they actually were in reality. The absolute error between the target reaction time, and that

recorded by E-Prime, was 58.81 milliseconds with a standard deviation of 6.21

milliseconds. So rather than being 300 milliseconds as intended they were 359

milliseconds on average with a Standard Deviation of 6.21 milliseconds. Again these RT

errors can be easily plotted in Excel.

Response Time Error (OEM Mouse)

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Trial No

Error in ms

(M=58.81, SD=6.21, Min=46.00, Max=74.00, Var=38.56)

In this sample case study we have compared timing information obtained or generated

using the Black Box Toolkit with data recorded by the paradigm under test. From this we

can conclude that if we were to use the OEM mouse in question as a response device this

would have an unacceptable affect on our presentation and response timing. In terms of

stimulus presentation this may substantially alter what we intended when designing the

paradigm.

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Black Box IEEE 1284 Betriebsanweisung Seite 82