Creation of new variables and storing in logger using custom form with loop

christos2

Hello,

Using OpenSesame 3.1.6

I have a form_base that contains image-buttons whose content is specified via a loop that calls a sequence (containing a single form/test to run).

The loop contains a list of words to be translated ([word_to_translate]), and three "guesses"/words given to the participant: [guess1], [guess2], [guess3]. These options are presented to the participant as image-buttons:

widget 0 0 1 1 label text="[word_to_translate]"
widget 0 1 1 1 image_button path="[guess1].png" var="[word_to_translate]\_[guess1]"
widget 0 2 1 1 image_button path="[guess2].png" var="[word_to_translate]\_[guess2]"
widget 0 3 1 1 image_button path="[guess3].png" var="[word_to_translate]\_[guess3]"

The correct answer [correct_response] is also specified in the loop's table.

I have the "Log all variables" enabled in the logger, and I am seeing the following info correctly registered:

[word_to_translate]_[guess1] -> Yes/No
[word_to_translate]_[guess2] -> Yes/No
[word_to_translate]_[guess3] -> Yes/No
time_[word_to_translate]
etc

What I also want to record in the logger is the following info:

(a) Whether the participant answered correctly for any given [word_to_translate], i.e. effectively something like:
was_correct_answer_given_for_[word_to_translate] --> Yes/No

(b) The "response time", defined (I guess?) as
response_time_[word_to_translate] = time_[word_to_translate] - time_["previous"_word_to_translate]

But I don't know how to do either of them.

Could you please let me know if this is feasible?

With many thanks,

--Christos

sebastiaan

Hi Cristos,

In this case, I think you're better off using a simple inline_script. Below you see an example of how that works, with the difference that I used a button widget instead of an image_button. But the idea is the same. Does that clear things up?

Cheers,
Sebastiaan

from libopensesame import widgets

# These variables are probably defined in a loop table
var.word_to_translate = u'pour'
var.guess1 = u'to'
var.guess2 = u'for'
var.guess3 = u'against'
var.correct_response = u'for'

# Create a form
form = widgets.form(exp, cols=[1], rows=[1,1,1,1])
form.set_widget(widgets.label(form, text=var.word_to_translate), (0,0) )
form.set_widget(widgets.button(form, text=var.guess1), (0,1) )
form.set_widget(widgets.button(form, text=var.guess2), (0,2) )
form.set_widget(widgets.button(form, text=var.guess3), (0,3) )

# Execute the form and see how long it took. Also see if the return value of the
# form matches the correct response. In the case of an image_button, the return
# value wil correspond to the `path`.
start_time = clock.time()
response = form._exec()
response_time = clock.time() - start_time
correct = response == var.correct_response

# Add the response to the response history!
responses.add(response=response, correct=correct, response_time=response_time)

christos2

Many thanks for the detailed response, Sebastiaan. I can see that with the inline python one has much more flexibility.

I still need some help with adding some variables to the response history, though. As it stands, only the response, correct and response_time from the last entry in the loop table are saved (because they are overwritten every time the sequence is called). Can I add a "_word_to_translate" suffix to these variables somehow? Not sure how to do that.

(my logger claims it logs all variables)

--Christos

sebastiaan

You can specify an item as keyword. If you do that, OpenSesame will also register the responses with a _[item] suffix, just like for a keyboard_response.

responses.add(
    response=response,
    correct=correct,
    response_time=response_time,
    item='some_unique_identifier')

See also:

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

christos2

Thank you very much Sebastiaan! This seems to do what I need.

Best, C.