Stop experiment after correct responses to N trials

Daxide

I am a novice and I need to design an experiment that stops the sequence, ending the experiment after correct responses to N=12 trials have been given.. I am guessing (wrongly?) that I should add a line to the "break if" field in the Loop item.

eduard

Hi,

This could be an option. Assuming that you have a variable that keeps track of the number of correct responses, something like that (in the break_if field) will work:

[no_correct = 12]

Of course, if you have nested loops (e.g. a trial loop in a block loop), you would have the other loop as well.

Does this make sense?

Eduard

Daxide

Yes, it makes sense. How do I create a variable that keeps track of the number of correct responses? I suppose I have to add some Python command.
The script now looks like this:
set break_if "[no_correct]=12"
setcycle 0 target_digit 11
setcycle 0 target_letter AA
setcycle 0 correct_response S
setcycle 0 no_correct ""
setcycle 1 target_digit 99
setcycle 1 target_letter AA
setcycle 1 correct_response S

sebastiaan

Hi guys,

As of OpenSesame 3.1, you can also make use of the responses object, which keeps track of all responses. For example,responses.correct gives you a list with the correctness (0, 1, None) of all responses, where responses.correct[0] is the last response.

So the following break-if statement would break the loop whenever the last three responses were correct.

=len(responses.correct) >= 3 and None not in responses.correct[:3] and 0 not in responses.correct[:3]

See also:

• http://osdoc.cogsci.nl/3.1/manual/python/responses/

Cheers!
Sebastiaan

Daxide

Great! It provides feedback and breaks the loop as I requested. However, the message pops up asking to press any key to continue, whereas the experiment should be over once a N number of correct responses has been achieved.

sebastiaan

However, the message pops up asking to press any key to continue, whereas the experiment should be over once a N number of correct responses has been achieved.

This seems pretty basic. Maybe give it try yourself first, and if you get stuck you can ask always ask again. What do you say?

Daxide

That's right. Sorry I have been using OpenSesame for only a few days. I figured it out, I just had to repeat the cycle only once.