Non-allowed responses

[Hester Duffy]

Hi David,

Thanks for your quick response! This was the first thing I thought of
too, so I've checked, and nope, the allowable inputs are correctly set
as 123456, and no-one reported any problems hitting the keys they
wanted (I'd had some earlier glitches, so I made a point of asking all
my participants whether it had run smoothly or if there had been any
problems!). I definitely used the same version for them all too. So
I'm stumped!

H

On Fri, Aug 27, 2010 at 1:40 PM, David Vinson <d.vinson at ucl.ac.uk> wrote:
> Hi Hester,
>
> I'm pretty sure E-Prime does not automatically permit 0 as a response if you
> have set allowable inputs to something else.  (I checked one such experiment
> I have on hand, and no dice - only allows 1234567 and not 0).
>
> If you really have no 6 responses in your data set, my first thought would
> be to double check the "permitted responses" in your experiment file(s).
>  Especially if there are trials which are meant to have such a response - it
> seems highly unusual that no subjects would ever respond 6 if it's a viable
> choice.
>
> This seems like an easy mistake to make - coding permitted responses as
> 012345 instead of 123456.  Such mistakes can very easily slip through if you
> have multiple response devices enabled (we had one such situation a while
> back when using the SR-box and the keyboard: changed input numbers on one
> but forgot to update the other one).
>
> If so, some of your subjects may have adopted a strategy of trying 0 after
> unsuccessfully mashing the 6 key, while others may have selected the next
> best choice.
>
> You might also check and see whether all subjects ran on the same version of
> your experiment - if this pattern exists only in subjects who ran in one
> particular time period, or something like this.  (such situations can
> happen, for example, if the e-studio version of the program is updated, but
> a newly compiled .ebs or .ebs2 file is not updated on data collection
> machines).
>
> However, I hope you find a better answer - all of my answers would create
> problems interpreting the data you've already collected!
>
> -dv
>
>> This is probably a stupid question, but I'm a bit bewildered. I've run
>> an E-rpime experiment in which participants were asked to identify the
>> accent in which some sentences were spoken; after each sentence, a
>> text display asked them to press 1 for Italian, 2 for Polish, 3 for
>> Welsh, and so on. They were offered the numbers 1 - 6, and the
>> allowable inputs were set as 123456.
>> Looking at the data, there are no 6s in the responses, but there are
>> 0s. These are not time-outs, as far as I can tell by looking at the
>> response time data, and I'm getting them in the data from several
>> different participants (but not all). So how do I have non-allowable
>> inputs? Is this a glitch, or does E-prime atomatically allow 0 as an
>> input, or what? Any insight very welcome!
>>
>> Many thanks,
>>
>> H
>>
>
>
> --
> David Vinson, Ph.D.
> Senior Postdoctoral Researcher
> Cognitive, Perceptual and Brain Sciences Research Department
> University College London
> 26 Bedford Way, London WC1H 0AP
> Tel +44 (0)20 7679 5311  (UCL internal ext. 25311)
>
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