variables related to keypress are a step late in sequence

reichardtr

Hey guys!

I am doing a basic recognition memory test, where participants respond with a button press to visual stimuli.

In order to show each picture for the same amount of time, I want to deduct the RT of response from the specified time (3000 ms).

The issue is: it seems that i always access the RT from a cycle behind (using keyboard response and inline javascript - vars.response_time_ELEMENTNAME). On the first trial, the post-keypress scene never appears, then it appears for 3000 ms - previous RT, instead of actual RT.

Any help would be appreciated!

lvanderlinden

Hi @reichardtr ,

Could it be that you placed your JS code in the Prepare tab of your `inline_javascript` item? It should be in the Run phase.

Cheers,

Lotje

reichardtr

Unfortunately, not. It does not seem to influence this behavior whether the code is in prepare or run.

I added a logger before the JS script to make sure that the RT is saved before I try to access it, but it also doesnt seem to matter where this logger element is in the sequence.

lvanderlinden

Hi @reichardtr ,

Could you update your experiment here, so that we can take a look?

Cheers,

Lotje

reichardtr

Hey Lotje,

Meanwhile, I managed to solve the problem. The second presentation should have been a feedback element, bc the sketchpad is prepared before the trial starts so it uses variables from the previous cycle.

Thanks for your help though! :)

lvanderlinden

Ah, that makes sense! Thanks for letting us know!