Error in OpenSesame Examples

muec

Hello!

Thank you very much for OpenSesame.

I'm running OpenSesame 3.2.8b1 on Ubuntu 18.04. I noticed that some examples with coroutines provided do not work well. The examples are:

-Go/NoGo Response Inhibition Task (https://osf.io/wf9dy/)

-stop-signal-task.osexp (https://github.com/smathot/opensesame_coroutines/tree/master/examples)

The issue occurs when running the experiment, when two keyboard responses are provided within a trial. The first keyboard response is correctly recorded within the current trial, while the second keyboard response is wrongly attributed to the following trial with a minimum response time (1 or 2 ms).

How is is possible to solve this, i.e. recording just the first keyboard response and discarding the second? The "flush pending key *" selection does not prevent this behavior.

Thanks,

Alessio

sebastiaan

Hi Alessio,

I believe that this is a general problem with PyGame not flushing key-press events on Ubuntu. I'm not familiar with any workaround for this. But if you select the psycho backend (with PsychoPy), the issue should probably not exist. Is that right?

Cheers!

Sebastiaan