conflict for feedback element?

argiro

Hi I am using a feedback for right or wrong in a trial and then a feedback at the end of the whole exp for Accuracy and RTs. When I have both of these as feedback elements (as created by OpenSesame) the second feedback gives me an error of undefined Acc and RT, while if I replace the trial right-wrong feedback with a sketchpad then the exp. works fine. Am I doing something wrong?

Josh

Hi,

By default, the feedback item resets feedback variables. This needs to be turned off (in the trial sequence) if you want to have feedback at the end of your experiment I think.

Cheers

Josh

argiro

Tried that one but still resulted in an overall undefined Acc and Avg_RT

eduard

Hi Argiro,

I don't think you can have both, a trial and an overall feedback with the same variables just because one thing can't represent two different values. If you create overall variables yourself and use them in the final feedback item, it should work. So for example on every trial, you add the acc and rt to a list of all RTs and accuracies and divide them by the total number of elements.

Eduard

argiro

Hi Eduard
My issue is not the variables but actually the "ready-made" feedback item of OpenSesame. If this type of form has to be used differently when included in a single experiment then maybe the instructions or a tutorial to be provided for the newbies? We found a way to work around it but not with the ready-made feedback item. Hope this makes sense.

eduard

Hi,

The feedback item does not need to be used differently per se. The one only special thing about the feedback item that distinguishes it from a normal sketchpad is the fact, that the variables it is showing are only computed in the run_phase of an experiment. This makes it possible that the feedback contains stuff that happened in the run phase of the current trial (see here). If you used a normal sketchpad your accuracy and avg_rt would be NAs. The point I want to make here is that the default settings of the feedback item are not set in stone. If you have a standard experiment that uses the standard procedure to compute accuracy and RTs, you don't need to adapt it. However, if you define those variables yourself, you also need to change the variables in the feedback item. In theory, it doesn't matter when or how often you use it. Its behaviour is always the same.

I hope this clears things up.

Eduard