Millisecond Forums

This is above mentioned attachment.

> then subtract the trial's latency from it at the end of <trial choice> (/ timeout = values.choicetimeout-trial.choice.latency)

This is wrong.

You'll want

/timeout = values.choicetimeout
and
/ontrialend = [values.choicetimeout-=trial.choice.latency]

Also, you do *not* set values.choicetimeout to 15000 *in <trial init>* as I said you ought to do. You need to fix that.

Finally, I don't see how that /branch makes sense:

/ branch = [if ( trial.choice.response == "7" && trial.choice.sumlatency==trial.choice.timeout) trial.collect]

I add two conditions:
1. / branch = [if ( values.pumpcount == values.explosionpoint && trial.choice.response == "7" ) values.choicetimeout-=trial.choice.latency]  ==> It is intended to set remaining wait after pop resulted from pressing too many times, and next trial will begin after 15s duration reaching.
 
2. / branch = [if ( trial.choice.response == "8" ) values.choicetimeout-=trial.choice.latency] ==> It is intended to set wait for voluntarily stop pumping.

However, both of them seem didn't work.

Both don't make sense. You don't need new branches and you definitely don't need them in <trial choice>. If a balloon pops, the relevant <trial> is <trial pop>. That's where your <trial> choice branches to anyway. The /timeout in <trial pop> needs to be the remainder.

Same thing for a voluntary collect. <trial choice> branches to <trial collect> anyway. You need to modify <trial collect> to wait for the remaining time.

Fistly, in your last attachment, the trials didn't terminate at 15s but at more than 20s. Second, I don't understand your instructions about my last two qestions, could you give me more elaborative examples? Thank you.

If you want to have either <trial pop> or <trial collect> last for whatever remains of the allotted 15000 ms, you simply do:

<trial pop>
...
/ trialduration = values.choicetimeout
</trial>

<trial collect>
...
/trialduration = values.choicetimeout
</trial>

Thnaks for your illustration. However, your second script works while the first one doesn't. Moreover, trials also didn't terminate within 15s after several presses.

Both work just fine. As for the timing: See attached.

Note: Giving participants a total of 15 seconds to make responses and having an entire *round* last approx. 15 seconds are *two different things*. Your wording and previous code snippets suggest you want the former, while you actually seem to want the latter. Such differences matter, please communicate them clearly.

Thanks for your help. It looks great.

It may be the last two questions (i hope so). First one, revised BARTY.iqx works well, however, it seems exceeding 2s than expect. Specifically, I expected the totoal time is 3mins 16s (1s fixation+10s instruction+15s*12 balloon+5s feedback).

The second question is about cued go no go task (see attachment). I want that each trial was exact 4s (from <trial cue> to <trial target> to <trial iti>), so i add "/ posttrialpause = 3300-trial.target.elapsedtime-trial.cue.trialduration" in <trial.target>. However, it resulted in 8s more than expect, and the colored rectangle didn't disapear immediately after my response (in fact, I want it disapeared immediately after my response then wait for a while until next fixation appeared, just as default setting). Could you help me figure out how to resolve it? Thank you so much.