Using mouse click to select one of several alternative responses

[Paul Groot]

Hi Richard,

I currently don't have an eprime license to check my own example, but
in general there are two way's of dealing with wrong-clicks:

1) put the relevant slide and script in separate list that loops
'forever' (i.e. putting a high number for the 'exit list after'
value). Then use the List.Terminate function to accept, stop the
sublist and continue.

2) Put a label before the relevant slide and use a goto-statement to
jump back to the label if IACC=-1. (i.e. if iACC=-1 then goto MyLabel)

I personaly don't like the goto-construct because one of the drawbacks
is that wrong selections are not logged automatically. However, the
use of an additional list takes a bit more effort to implement. I
think my example script is already using the repeating sublist because
the VasList is passed as third argument:

   choice = ACK_HandleResponse(c, "VasAck", VasList)

But remember to set terminate condition of the sublist to a large
value in that case.

best,
paul



2012/1/10 Richard Carvey <supercarv at googlemail.com>:
> Hi Paul,
>
> I've made use of that code, thanks. The only problem I'm having is
> that a click outside of a target button still advances the program,
> logging the response, but moving on to the next trial. Is there any
> way you know of that I can set it so that a click outside of specified
> areas (so an iACC = -1) doesn't do anything? Or perhaps so that it re-
> loads the response screen for them to try again?
>
> Thanks,
>
> Richard
>
> On Dec 19 2011, 10:44 pm, Paul Groot <pfc.gr... at gmail.com> wrote:
>> Hi Richard,
>>
>> You might have a look at the VAS example script I posted a while ago
>> onhttp://pfcgroot.nl/e-prime/83-example-scripts/80-visual-analogue-scal....
>> This example contains a bit more script then you need, but the
>> ACK_HandleResponse function (in the user script tab) demonstrates how
>> you can use boundaries of (text-)objects as hit area for mouse clicks.
>> The core of this piece of script uses the Mouse.GetCursorPos and
>> Object.HitTest functions to implement two user confirmation buttons.
>> It can be easily adapted for more buttons. Also, instead of using the
>> boundaries of a slide element (i.e. text or image), you can also make
>> your own hit-test function.
>>
>> cheers,
>> Paul Groot
>>
>> 2011/12/19 Richard Carvey <superc... at googlemail.com>:
>>
>>
>>
>> > Hi,
>>
>> > I'm trying to build an experiment in which nine items are displayed on
>> > screen, and participants need to select one fo them using the mouse. I
>> > have seen a couple of people mention issues with clicks anywhere on
>> > screen being registered as responses, but I would like to make sure
>> > that only clicks within the bounds of the nine items are accepted, and
>> > that the specific item clicked is logged. Clicking any of the nine
>> > items should advanc the program, no one answer is correct or
>> > incorrect.
>>
>> > If anybody could offer me some advice on how to achieve this, it would
>> > be greatly appreciated. Annoyingly, whoever installed E-Prime (1.2,
>> > btw) on this computer saw fit not install the help functions correctly/
>> > at all.
>>
>> > Thanks,
>>
>> > Richard
>>
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