correct response and response time are undefined

maryam_omranian · December 2020

hi

would you like to help me? I have question about my experiment. I can't do it on the web services. and I can't define correct response and response time when the participant presses the space bar?

CPT_ax.osexp

lvanderlinden · December 2020

Hi @maryam_omranian ,

Welcome to the forum! :-)

First of, it helps when you give your discussions a meaningful title. That keeps the forum more clean. (So I changed it.)

Regarding your question, I think you should:

Append a keyboard_response item after your last sketchpad item (called "ISI")
And realize that the variable 'correct' will only be defined on the "red-square" trials, because for the other values of the variable 'var1', the correct_response is not defined. Therefore, the value of the variable "correct" will be "undefined" (instead of 1 of 0) on all other trials ("red circle" etc.)

Does that make sense?

Cheers,

Lotje

maryam_omranian · December 2020

hi

no I can't understsnd. For other variables, the key should not be pressed. so, I can't define this.

thanks for your response.

eduard · December 2020

For other variables, the key should not be pressed.

If the correct response is "no response", you can set the correct_response variable to None

maryam_omranian · December 2020

thanks, for your help.🌸

maryam_omranian · December 2020

I do that and define none as no keypress, but in my results I have no column that my participant press the key. it's not record in my result😐️. I don't know how to have my participant response as result. in logger I don't specify anything and I gathered all the things that I has defined in my experiments.

lvanderlinden · December 2020

Hi @maryam_omranian ,

In my previous post I suggested to use a keyboard_response item for response collection. Did you do that? If your experiment is still not logging the responses, could you upload the updated version?

Cheers,

Lotje

maryam_omranian · December 2020

yes I do that.

CPT_Osweb.osexp

here you are🌸

lvanderlinden · December 2020

Hi @maryam_omranian ,

What Eduard meant is to use the word "None" as the value of the variable "correct_response" on all trials that are not red squares.

Also, you set the timeout to 0, but this means that participants have no time at all to respond. So I would increase the timeout to something more realistic (i.e. a few hundred ms).

Cheers,

Lotje

maryam_omranian · December 2020

It was done. but I haven't any distinguished resopnse as space and none, that I can understand when a participant press space bar

CPT_axexperiment.osexp

.🤔 please help me again. here is my update experiment.

maryam_omranian · December 2020

hi Ivan

thanks for your help. would you help me again. I sent you my last experiment. but in result, I don't have any columns that show space bar key pressed.

happy new year. with best wishes for you,🌸💮💮❄️

lvanderlinden · January 2021

Hi @maryam_omranian ,

If you open the csv output file, you see a column that is called "response". This column contains the value "space" or "None", depending on whether the participant pressed space or refrained from responding. The column "correct" contains the value 1 (for a correct response) or 0 (for an incorrect response). I don't understand what information you are missing.

Cheers,

Lotje

maryam_omranian · January 2021

hi Ivan

thanks for your attention.

participants should press space bar key when they see red square. and, any key press for other variables is correct response.

Attached is a file that I did the test myself and pressed the space bar for all the red squares, and in addition I accidentally pressed the space bar for a blue star and two red circles and a red star. But in Excel file, unfortunately, these items are not seen in the column 'response'. column 'correct' just say the correct response but not the participant's result.

subject-20.csv

maryam

with best wishes🌷🌺

lvanderlinden · January 2021

Hi @maryam_omranian ,

You set the timeout to 500 ms but you probably took longer than 500 ms to respond on the red-square trials. Therefore, no keypresses were recorded and the response value was always None.

If you increase the timeout, the problem should go away.

Cheers,

Lotje

maryam_omranian · January 2021

Hi Ivan

subject-21.csv

subject-25.csv

Honestly, all times 500, 1000, 2500 and 3000 were used, but still no response was recorded, and I think the problem is with the ISI, because by changing the timeout, the time between the stimuli changes. Correctly, the time interval between stimuli should be randomly 1000, 1500, 2000, and 2500 (same as ISI). In the last test I did (although I did not complete it), I pressed the space bar for all variables, but only two were recorded. Files were sent.

I think the objection must be from the ISI. Could you please guide me again?

Maryam

with best wishes🌺

lvanderlinden · January 2021

Hi @maryam_omranian ,

Are you testing on your computer or in the browser?

Cheers,

Lotje

maryam_omranian · January 2021

Hi, Ivan

I apply it on the opensesame in my laptop. but I want to use experiment in the web for my participants in my research.

maryam_omranian · January 2021

hi Ivan,

in my computer, I try it. but I want to online it in jatos and then get link for my participants that they are going to do it.

thanks, for your attention

with best wishes🌺

maryam.

lvanderlinden · January 2021

Hi @maryam_omranian ,

Firstly, please note that my name is Lotje, not Ivan. ;-)

I can't reproduce your problem. If I press space on all trials, the column "response" correctly contains the variable "space". (I used the latest version that you uploaded here.)

6786_5.png

I noticed a few other things:

I think you should use the square-bracket syntax to define the duration in your sketchpad item called "ISI" to set the duration. Now you made the duration fixed (500ms) instead of using the variable that you defined in your inline_javascript item. For more information on the square-bracket syntax, see here: https://osdoc.cogsci.nl/3.3/manual/variables/#defining-variables

6786_3.png

Also, shouldn't you show the empty sketchpad (ISI) before the stimulus? Otherwise, the RTs are indeed off.
You don't have to define the correct response in the keyboard_response item again if you already defined the variable "correct_response" in the block loop. So you can leave this box empty.

6786_4.png

Good luck!

Lotje

maryam_omranian · January 2021

hi, Lotje

I'm sorry for my mistake.

I do not know why my data recording is different from yours when I run the test? It's weird for me😯

subject-11.csv

And that I really do not know what to do?

thanks for your help🌺

maryam

maryam_omranian · January 2021

hi Lotje

I want to try it on another PC.

thanks for your help🌺.

maryam.

lvanderlinden · January 2021

Hi @maryam_omranian and @mfp49 ,

In addition to our advice about the timeout, I believe you should also reverse the order of the sketchpad items "stim" and "ISI". (See my previous post.)

Also, can we please merge these discussions into one?

Cheers,

Lotje

maryam_omranian · January 2021

Hi, Lotje

thanks a lot.

when I reverse stim and ISI my experiment recorded response and response- time.

with best wishes to you. thank you very much.🌺🌸🌷

lvanderlinden · January 2021

In very glad to hear, Maryam!

😊

maryam_omranian · January 2021

hi lotje

some of my participant when I online my experiment can't do it. and, they recieve error message.

when they change their computer it's ok and they do the task. but some of them haven't second computer, and when they can't do the the task, they leave experiment.

would you mind help me again?

with best wishes,🌸

Maryam

lvanderlinden · January 2021

Hi @maryam_omranian ,

Can you reproduce the problem on your own system? If you press Ctr+Shift+I, do you see any error message written to the console?

Cheers,

Lotje

maryam_omranian · January 2021

Hi, Lotje

woud you please tell me how I can reproduce this error on my system? this is my participant's error. I don't understand what should I do. may I ask you for more explanation, please?

thanks,🌺

Maryam

maryam_omranian · January 2021

Hi, Lotje

with my stroop online task at jatos they see this error.

strooptask.osexp

thanks, with best wishes,🌷

Maryam

lvanderlinden · January 2021

Hi @maryam_omranian ,

I'm sorry to hear that some of your participants are not able to run the study. But without an error message I can't help you finding the problem. Perhaps you could ask one of your participants to press Control-Shift-I and copy the message from the console.

I did notice something else while looking at your script: The duration of the sketchpads showing the color stimuli should be set to 0 instead of "keypress". Otherwise, the response values that you are measuring with the keyboard_response item won't be recorded correctly.

Good luck!

Lotje

maryam_omranian · January 2021

Hi, Lotje

ok. Im' going to ask one of my participant to do that and, I will send you the message, she recieve.

thanks for your attention to my task, ok, I changed it to zero.

thanks a lot.🌺

Maryam

maryam_omranian · January 2021

Hi, Lotje

this is the message, would you like to help me again?

IMG-20210109-WA0040[1].jpg

thanks ,🌺

Maryam

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