OSWeb - feedback problems using run if

Hippokrampus

sequence.png

Hi @sebastiaan! Hello everyone!

I'm currently trying out OpenSesame/OSWeb for the online implementation of my bachelor thesis study.

It has been working pretty good so far, but now I'm facing a problem with giving feedback via the run if technique as explained in your WCST tutorial (https://osdoc.cogsci.nl/3.2/tutorials/wcst/). I could not fully copy the method as I'm not working with a fully-factorial design here.

When I testrun the experiment in the browser, it doesn't seem to work.

The study presents images to the participants in random order and they have to choose to which category it belongs to using a keyboard response. It is crucial for my experiment to give feedback, whether the answer was correct or not.

I have (see image):

• random images; looped [img] variable with filenames e.g. 'a1.jpg'
• another [img_cat] variable; defining the category of each image
• correct keyboard responses for each category (e.g. press 1 with correct response set to 1)
• two sketchpads for correct/incorrect feedback using run if and [correct] = 0 and 1

Is there a way I could implement this in OSWeb?

Thank you very much in advance! I love the work you're doing with this amazing tool.

Cheers! :)

Lenny

sebastiaan

Hi Lenny,

In principle, all the things that you are describing should be compatible OSWeb. But …

When I testrun the experiment in the browser, it doesn't seem to work.

… you have to be a lot more specific ;-) In what sense doesn't it work? Do you get a crash? If so, what is the error message? Is the behavior different from what you would expect?

• https://osdoc.cogsci.nl/3.3/manual/osweb/#debugging

Cheers,

Sebastiaan

Hippokrampus

Oh okay, I see. So the problem I'm having concerns the feedback after each trial.

I would like to achieve the following implementation in OSWeb:

1.) present a random image

2.) let the participant press a key (1 to 7) to categorize the image

3.) give feedback whether the response was right or wrong

4.) repeat this procedure

The feedback works perfectly fine in OpenSesame ... but as soon as I run it in the browser, the feedback always turns out as 'incorrect' (I assume this is because of the run if [correct] = 0 or 1 conjunction of the feedback sketchpads that somehow doesn't seem work).

Any ideas what could do the trick here? :)

Thanks,

Lenny

Hippokrampus

[SOLUTION]

Problem was simply a wrong equals operator.

I tried out '===' instead of '==' in all my inline_javascripts and that does the trick!

if (vars.correct_response === vars.response) {
	vars.correct = 1
	vars.trials_correct_val += 1
}