[solved] How to create different feedback delay for each response key?

noamkarsh

Hi

I want to thank you for the great help I have got from you with my previous problems.
I want to make some changes in the previous experiment programmed at OpenSesame.
The experiment has four response keys. Clicking on each key leads to a flash (sketchpad) on the screen immediately.

Is there a way that the flash will appear after different delay for each of the four keys?
For example, after pressing the "h" key, a flash will appear after 300 milliseconds, after pressing the "d" key, a flash will appear after 600 milliseconds etc for the remaining two keys.

if necessary, i would be happy to share with you the experiment files through DropBox. If so, what is your address?

Thank you for your help
Noam

lvanderlinden

Hi Noam,

Yes, that's certainly possible! To make the response-flash interval depending on the given response:

Firstly, place an inline_script item between the keyboard_response item and the flash:

Secondly, place the following Python code in its Run phase tab (see comments for more information):

# Determine the delay between response and feedback item
# depending on the given response:

# To determine the given response, we use the built-in OpenSesame
# function 'self.get()'. See also:
# http://osdoc.cogsci.nl/python-inline-code/experiment-functions/#experiment.get

# If keyboard responses that do NOT appear in the if-statements below ARE
# allowed to be given, first make sure your experiment doesn't crash 
# if a different response is given. You can do this by giving 
# the variable 'delay' (which we'll use to pause the 
# experiment) a starting value:
delay = 0

# If a certain response is given ...
if self.get("response") == "a":
    # ... declare the corresponding delay in ms:
    delay = 300
if self.get("response") == "b":
    delay = 600

    # Etc. for the other responses


# Set the response for future use in the GUI (e.g. for
# your logger item) by using the 'exp.set()' function.
# See also:
# http://osdoc.cogsci.nl/python-inline-code/experiment-functions/#experiment.set

exp.set("delay", delay)

# Pause your experiment for the desired delay by using the built-in OpenSesame
# function 'sleep()'. See also:
# http://osdoc.cogsci.nl/python-inline-code/experiment-functions/#experiment.sleep
self.sleep(delay)

Does this answer your question?

Best wishes,

Lotje

noamkarsh

it works great!
thank you!
Noam

lvanderlinden

Great to hear!
Don't hesitate to post any further questions you may have!