Samantha,

After some testing, it looks like the two parameter settings
includyemptytrials and includedashtrials might be reversed. Try setting
the other parameter to 0.

Thanks for reporting this! the fix should be in the next release of PEBL,
so be sure to watch for that if you upgrade in the next few months after
release.

Shane


> Dear PEBLers,
>
> I have a question regarding the Flanker test (in the recently released
> PEBL2.0). To follow the design of another study, we would like to tweak
> some of the default settings of the test. More specifically, we would like
> to exclude the ‘dash trials’, which in the parameters is the
> ‘includedashtrials’ parameter:
>
>    parpairs <- [["numreps",20],  ##20:number of repeats of the 2x3 design
>                   ["practicereps",1], #2
>   ["includedashtrials",1], ##whether -->-- and --<-- trials should be
> included
>                   ["includeemptytrials",1], ##whether [  >  ] and [  <  ]
> trials should be used
>                   ["arrowsize",40],
>   ["gap",2],
>   ["fixationtime",500],  ##time of fixatiotn cross
>   ["timeout",800], ##how long to make response
>   ["iti",1000]  ##time between trials
>
>                  ]
>
>  This is by default on ‘1’, but whatever I change this to (0, NA, -1,
> nothing), be it in the code itself, or the parameters window of the
> launcher, the test always comes with the dash trials. Even removing this
> line from the code, as well as some other ones don’t seem to do the
> trick.
>
> Would anyone by any chance happen to know how I could fix this?
>
> Many thanks,
>
> Samantha
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