Sound feedback after a key response

Builder
1

Hi guys,

I’m trying to conduct the stroop test and I want to include a buzz whenever the participant makes a mistake. I went through YouTube videos and some of the posts about the same topic and I tried to mimic the procedure. However, whenever the experiment starts and when it’s supposed to give a noise it crashes.

I’m attaching snippets from the experiment, the code and the error that I got. Just as a note in the code you’ll find the “a” variable, it’s just a dummy variable to fill in the if statement.

Your help is much appreciated.
Thank you in advance.

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2

Use something like Audacity to convert your sound file to 44.1 kHz rather than its current 48 kHz.

5

Hi,

Thank you for reply. It worked. However, now, whether the keyboard response is correct or not the buzz sound will play. Do you have any idea why is this happening?

6

Hello Moe,

you don’t need an if…else construction, if you don’t use the else-part.

if not key_resp_4.corr:
    buzz = soundfile[0]

should do the work. The reason that the sound is always played means that the if…else construction always evalutes to the else-part.

When you want to play the sound after the participants has reacted you have to move the code-element from the Begin Routine tab to the End Routine tab.

Best Jens

7

Hello,

Thanks for your reply. I removed the else part and shifted the code from the “Begin Routine” to the “End Routine” tab. When I run the experiment, the following error occurs.

File “C:\Users\Other user\Desktop\Noise Experiment\Noise Experiment_1_lastrun.py”, line 387, in
sound_1.setSound(buzz, hamming=True)
NameError: name ‘buzz’ is not defined

Experiment ended.

The “buzz” is defined in the sound component shown in the figure below.
I tried to move the sound component above the code component (maybe it was an order problem) but the same error occurred.

Any ideas?

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8

Hello,

did you ever define the variable buzz somewhere before you use it for the first time, e.g. in the tab Begin experiment? The code-element should appear before the sound-element.

Best Jens

9

Hi
I am stock in the same problem.
how can i define the vairable buzz? i know how to define a massege. e.g :msg=" "
but how to define a sound?
i tried
soundfile = “incorrectBUZZER.wav”

10

Hello

This defines a variable soundfile with the content incorrectBUZZER.wav.

Best Jens

1 Like
12

Hello,

here a small example which plays a sound when inccorrect and no sound when correct. I simply set the loudness to 0 when the response is correct while defining the same sound file for correct and incorrect answers.

SoundFeedback.psyexp (12.4 KB) Stimuli.xlsx (8.4 KB)

Best Jens

13

Hello,

as a matter of fact the code could be even simpler. You only need to set the loudness in your if…else construction. You do not have to set your feedback-file in the if…else construction.

Begin Experiment tab

msg = " "
soundFeedBack = 'CriticalStop.wav'
loudness = 1

Begin Routine tab

if key_resp.corr:
    msg = "correct"
    msgcolor = "green"
    loudness = 0
else:
    msg = "incorrect"
    msgcolor = "red"
    loudness = 1

Best wishes Jens

2 Likes
14

Thank you! i actually did that and it worked :slight_smile:

15

@chayabenyehuda

Do you mind marking it as solution? Then it is found more easily.

Best Jens