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Hi! Thank you for the video! It was really helpful! I just have an issue with pressing num keys. For example, using keypad, when 1 is pressed, instead of 1 being shown, num_1 is shown to the participant. I don't know what changes I should make to the textInput section where we have $respDisplay. Do you have any idea?

Hi Jason, I have seen some of your videos. thank you so much. I have a problem with PsychoPy output. After finishing the experiment, in the CSV file, the subject numbers are not shown in the same columns. for instance for a couple of participants, subject numbers are shown in e.g, column F, for some participants it is shown in e.g column H, and for others, the subject numbers are shown in column L. I want the subject numbers to be in one column. I appreciate it if you could help me with addressing this issue.

Thanks that was helpful for me

You have explained everything in the simplest manner. THANK YOU!

It was pretty useful thank you!

Jason - I sorted my issues out. Thank you.

Nice tutorials Jason - 2 questions 1. are you naming your variables in your code like 'word_stim' the same as your excel column on purpose (are they referencing those columns or are they just random labels for the code) and 2. I keep getting an error message that makes it clear the program is getting stuck when it gets to the 'random' designation in the trial loop gui box, but I deleted out the Conditions file so I assumed it would ignore all this.

The experiment crashes on the StimulusLoader routine on the current PsychoPy version on a Mac. Basically, the variables "word" and "colour" that should be loaded up by the loop from the excel file, do not seem to get recognized by the python code component of the StimulusLoader routine, as shown by the following error: >> word_list.append(word) >> UnboundLocalError: local variable 'word' referenced before assignment Has something changed with the new version of PsychoPy in the way of referring to variables loaded by loops in python code components?

Dear Professor Jason Ozubko, First of all, thank you for sharing such a high-quality psychopy tutorial, I learned a lot from it. But I'm a newbie and I have a question: In the memory experiment video, when using code to randomize across subjects, if the stimulus is replaced by images, how should I modify the code?

I think using `colour[0]` for "correct response" doesn't work as expected in this case. After you deleted `colour = colour_list[curr_item]`, `colour` will always be the color in the last iteration of the loop when the excel sheet is first loaded?

How do we make this work on Pavlovia? I followed the tutorial and was able to replicate what you have, but once I pushed to Pavlovia I started getting errors (like ReferenceError: Can't find variable: num_items; or ReferenceError: Can't find variable: color_stim)

Hello Jason, thanks for your video. I have one question; which format is the best one for images in Paychopyg Jpg, png or…? Also about the size, do you have any suggestion?

thank you for ur tutorial, you really help me a lot!

Hi Jason, thank you so much for these amazing videos! I have run into an error that I do not understand. I have followed your code exactly. The word and color variables are created at the beginning of the stroop routine. When I run the experiment, I get the following error "UnboundLocalError: local variable 'word' referenced before assignment". When I look at the code, psychopy indeed referenced the 'word' variable early in the the section where it initializes components for all routines (line 361) : # ---Initialize components for Routine "stroop_trial" ---- curr_item = -1 text_stroop = visual.TextStim(win=win, name='text_stroop', text = word, font = 'Open Sans', (....) But the word variable is only defined at the beginning of routine (line 794): # --- Prepare to start Routine "stroop_trial" --- continueRoutine = True # update component parameters for each repeat thisExp.addData('stroop_trial.started', globalclock.getTicke()) # Run 'Begin Routine' code from code curr_item += 1 word = word_list[curr_item] color = color_list[curr_item] (....) How can I fix this?

Wow! thank you so much for sharing with the community your expertise and creating this type of tools!

Hi again. To be more precise, I need to know how should we build an excel sheet for multi-key answers (writing a series of shown digits)... How should we define the correct answer? And how can we end up the task after two incorrect answers?

Hi again. To be more precise, I need to know how should we build an excel sheet for multi-key answers (writing a series of shown digits)... How should we define the correct answer? And how can we end up the task after two incorrect answers?

Hello. Thanks for your helpful videos. Please tell us about how to make a forward/backward digit span task. I'm really confused. Is it possible to make it in builder or coding is necessary. Thanks in advance for your prompt reply

Just adding to the many comments thanking you for the work you put into this! I've tried learning Presentation by NBS because my supervisor suggested it and there is little to no useful instruction to be found online. As someone who has a bit of coding experience, this is SO much better, and the in-depth tutorials you uploaded make me very confident that i will be able to program a task for my thesis! Thanks!

thank you so much!:)

amazing! thank you so much

Thank you so much. I am about do my MSc. master thesis research and you help a lot! The best instructor ever!

life saving

I can not open my files!! Every time i try it sends me an error: pygame.error: Out of memory. Failed to execute script 'main' due to unhandled exception! Can anyone help me??

Hi! I have a question, I’m building an experiment and I have kinda like 5000 words to be shown to the participants. However each trial should have just 20 of these words presented in a randomised order (e.g. trial one - rows shown: 10-50-100-600-350-270-978- and so on up to 20 words) how do I do that? Thankssssss 🙏

Thank you so much. The video is very helpful to me! (At least I realised that I have to learn JavaScript as well 😂.)

Still useful - thank you! :)

thankyou so much it was really so helpful, you've explained everything so simply

Thank you, Jason. Your tutorials are very easy to follow.

Thank you for your amazing lesson! I have one question tho, it seems to fail to read variables in the conditions file cuz every time I try to run it, it showed either error or showed only square_stims images. I think the trail and block loop look the exact same as you did.. could there be a way to fix this?

Thank you

Thank u sir

Thanks❤❤

Hi psychopy viewer looks awesome. It would be 'awesomer' if mac users could use it as well. Are you considering building a Mac version or sharing the codes (so that Mac users may build for themselves). Always enjoying your videos, thanks!

Lines are fine between Psychopy and "Python"

How can I organize the data from my experiment in the data excel sheet? When I open my data sheet the data is there but not sorted into individual columns.

Wouldn't it be much better to just have two different files for the variables that way you can just truly randomize instead of having to insert every combination manually? What if I have 100 different colors?

Wow, this is an awesome tool!! Keep up the great work! 😊

I need to add loops for the keyboardto work properly?

Hello @Jason! I have the same issue, and I used almost all the approaches that I could find online, including yours. For example, adding the external resources in the online tab in the experiment setting windows didn't work; deleting all the things to restart didn't work; adding extra code like yours didn't work (because the js code always put "import psychoJS" after the code importing resources. Don't know what I should do now.

just started my PhD and this is my first try at learning psychopy, which means that I will remember this video for the rest of my life. In a positive way :D thank you so much!

INFINITY NUMBER OF THANKS FROM TURKEY! I am a bachelor student and I am working on an independent study, it is behavioral experiment but i have zero coding skills, thanks to you i will able to create my experiment! THANK YOU SOOOO MUCHHHH<3

Thank you for the videos Can we do sternbergs test on psychopy

hi！ I'm trying to write an experiment using python idle. display.update() in pygame can update only part of the screen instead of the whole screen(display.flip()). But how to use psychopy to achieve this update function? When I set the clearBuffer in win.flip() to False according to the psychopy manual, I didn't achieve the effect I wanted.Looking forward to your response. Thanks a lot.

Thanks for the video, it was helpful. However what you have shown is "without repetition" aka. equal Distribution (each stim is shown once). I've been trying to do : (in each trial, only one of the rows is shown). This is not explained anywhere

Note xlrd function may not work bc xlrd 2.0.0 and above can only read .xls files.

Hi Jason! This series has been really helpful for me to understand how to use psychopy for my dissertation. Thanks for speaking so clearly! How could I add a variable for a trial (like the fruits) and have like, 60 options from an excel sheet, and only have it show one random item from the list in one trial within a loop?

thank you so much <3

This is an amazing tool! Thank you!

Fantastic tool to save time!