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Questions tagged [psychopy]

PsychoPy is an open-source python module written in python and c libraries for the generation of experiments for neuroscience and experimental psychology. PsychoPy includes Builder and Coder - two graphical interfaces to build experiments using the psychopy python module.

PsychoPy is an open-source Python module written in Python and C libraries for the generation of experiments for neuroscience and experimental psychology. PsychoPy includes Builder and Coder - two graphical interfaces to build experiments using the PsychoPy Python module.

Links:

See the project website for documentation and more information about PsychoPy.

All support now takes place in the psychopy forum

See Github for psychopy's source code. Contributions are very welcome!

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How to make 1 of 2 stimuli disappear after 1 is replaced?

I am using the Builder view to create a Dot-Probe Task. My task starts with a fixation cross, followed by two words being presented. After 500ms, 1 of the words is replaced by a probe (3mm dot). I created the dot with the "Image" component. My…
Chelsey Wilkes
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Randomizing in all possible combinations in Python

Here is my code: if condition == '1': a = glob.glob("DDtest/targetimagelist1/*") b = glob.glob("DDtest/distractorimagelist1/*") c = glob.glob("DDtest/targetimagelist2/*") d = glob.glob("DDtest/distractorimagelist3/*") e =…
y3trgfhsfgr
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multiple contingencies in python

Here is my code (though incomplete): for k in range(len(ace)): recognitionstim.image = ace[k] old.draw() new.draw() if ace[k] in ac: recog = 'old' else: recog = 'new' win.flip() trialClock.reset() …
y3trgfhsfgr
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Read buttons from joystick with pygame

I'm new to PsychoPy and am testing a few tasks. As a response mechanism I use the buttons on a joystick (logitech G27). I import pygame, and can detect button presses in (the Sternberg example of) PsychoPy, so that's okay. However, after a…
Wim van Winsum
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Fatal Python error: (pygame parachute) Bus Error

Here is my code: from psychopy import visual, event, gui, data, core import random, os from random import shuffle from PIL import Image import glob a = glob.glob("DDtest/targetimagelist1/*") b = glob.glob("DDtest/distractorimagelist1/*") c =…
y3trgfhsfgr
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Modify the length of a sequence based on two list lengths

here is my code: from psychopy import visual, event, gui import random, os from random import shuffle from PIL import Image import glob # import images sequences and randomize in the same order a = glob.glob("DDtest/targetimagelist1/*") b =…
y3trgfhsfgr
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image randomization in Psychopy

I am trying to make an experiment in Psychopy where I will project an image on the screen and will ask for a response from the tester. I would like for the images to come up randomly in a loop but after the tester has selected a response to the…
Dominic
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Psychopy: how to reference value in conditions file for feedback

I'm sure this is deadly simple, but I'm new to Psychopy and Python, so here goes: I have a conditions file similar to the following (in builder): text correctAns trialType text1 Ans1 TrialA text2 Ans2 TrialB When giving…
Devin
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ValueError: Unrecognized Mode

Here is my code: import Image img = Image.new("RBG",(649,489),(0,0,255)) for x in xrange(649): for y in xrange(489): img.putpixel((x,y),(0,255,0)) img.show() When I try to run this code I get a "ValueError: unrecognized mode", does…
y3trgfhsfgr
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Is there any way I can enlarge a stimulus in #psychopy without losing image quiality?

I'm importing my stimulus from a folder. I would like to make them bigger *the actual image size is 120 pix (height) x 170 pix (width). I've tried to double the size by using this code in the PsychoPy Coder: stimuli.append(visual.ImageStim(win=win,…
Fernanda Pérez Gay Juárez
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How can I speed up presentation of stimuli that use multiple simultaneous windows?

We are trying to recreate a 3x3 grid of simultaneous windows in PsychoPy, each displaying a radial optic flow pattern, as described by Cardin and Smith (2010). When we run the code the stimuli is too slow (taking a while to load). How can this be…
Phoebe A
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Psychopy GetKeys trouble

I've been battling this issue for several hours and my attempts to find a solution online have come up blank. Hopefully someone here has some insight. In the course of an experiment, participants see a series of stimuli followed by masks with no…
Ben
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PsychoPy Coder: define image duration based on frames

I have some experience in Matlab, but am very new to PsychoPy. For now I would like to continuously switch between two images until there is a keyboard response. Each image should stay on the screen exactly for 100ms, and I want to be able to verify…
Sebastian Korb
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Staircase frequency differences of sine wave sounds - auditory adaptive oddball paradigm

I try to create an auditory oddball experiment using PsychoPy. The standard sound should be a sine wave sound (440 HZ), the odds should be sounds at different frequencies. If the odd was detected, the difference between the odd and the standard…
Johannes
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Recording all key presses, as well as waiting on keys, in PsychoPy?

I am using PsychoPy for an experiment. I have a simple experiment, where the screen changes every time a certain key is pressed. This is simple, and I have used event.waitKeys() for this. However, I would like a 'background' process (not sure of the…
user1566200
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