problem with variable speed micro expression task: is there a way to let inquisit check whether computers are fast enough?

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problem with variable speed micro expression task: is there a way to let inquisit check whether...

problem with variable speed micro expression task: is there a way to...

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CharlotteV	CharlotteV posted 10 Years Ago HOT Topic Details Share Topic
Group: Forum Members Posts: 17, Visits: 110	Hello, we have a problem with a micro-expressions task. The task shows neutral faces and than a facial emotion is shown for only 67 or 120 milliseconds (depending on condition). Participants are asked which emotion it was. One of our colleagues owns a laptop of about 7 years old and this laptop does not show the facial emotions for only 67 or 120 milliseconds (which is really just a flash) but shows them a lot longer so that it becomes really easy to recognize them. Since people can complete our task online it is up to them which computer they use and we are now worried about the reliability of our task when it is executed on different, and sometimes perhaps old, computers. The specifications of my colleagues laptop are: Samsung R510, Intel Duo Core T5750 2 GHZ, Window Vista, Graphic card: Nvidia Geforce 9200M GS (assigned video memory 256 mb, total available graphic memory 1533mb), Firmware 175.97. We tried the task online as well as offline and there was no difference. We hope someone can help us out! We would like to know: (1) what can be the cause of the variability in speed? If we know more about this we can perhaps tell our participants not to use specific types of computers. (2) Or even better: is there a way in which Inquisit can detect whether computers are fast enough for this task en show a warning otherwise? Or only present the task if the computer is fast enough? If so, please post the code! Many thanks! Tags can Inquisit detect whether computer is fast enough?variable speed depending on computer
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problem with variable speed micro expression task: is there a way to...

CharlotteV - 10 Years Ago

(1) what can be the cause of the variability in speed? If we know more...

Dave - 10 Years Ago

A couple of other things: 1) What version of Inquisit are you using?...

seandr - 10 Years Ago

Thanks for your replies Dave & seandr! Seandr, I sent you a PM about...

CharlotteV - 10 Years Ago

Was discussing our variable speed problem with someone and wondered...

CharlotteV - 10 Years Ago

You should be able to derive that from the logged stimulusonsets in...

Dave - 10 Years Ago

The idea behind is that we can than later exclude the participants...

CharlotteV - 10 Years Ago

Thanks for your suggestion, but we cannot find anything called...

CharlotteV - 10 Years Ago

If you have decided to exclude stimulus onsets from being logged via...

Dave - 10 Years Ago

Ok thanks for checking. We did not decide to remove it or anything but...

CharlotteV - 10 Years Ago

You need to add as many 'stimulusonset' columns as your <trial>s...

Dave - 10 Years Ago

Thanks. Our format looks unfortunately a bit different from the one...

CharlotteV - 10 Years Ago

FYI: I have received & responded to your PM.

Dave - 10 Years Ago

Dave, thanks for your quick response! Now we tried one of your earlier...

CharlotteV - 10 Years Ago

Those results do not indicate any problem with the affected machine...

Dave - 10 Years Ago

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