Thread Tools  
jstrand
Junior Member
 
Join Date: Jan 2014
jstrand is on a distinguished road Posts: 9
Collect multiple responses to one stimulus, Posted February 3rd, 2014 #1
Hi! I'm having participants listen to a long recording of continuous sound (30 seconds). They need to respond (press spacebar) whenever they hear a specific sound, which will happen several times within the 30 seconds. Is there a way to collect multiple responses to the same trial? Thus far, I'm only to make it record the fact that they pushed the spacebar at least once at some point in the trial, but not when or how many times.

Thanks!
Reply With Quote
MonikaT
Senior Member
 
Join Date: Mar 2008
MonikaT is on a distinguished road Posts: 1,279
Posted February 4th, 2014 #2
Can you post the experiment so I can take a look at the settings?
Reply With Quote
jstrand
Junior Member
 
Join Date: Jan 2014
jstrand is on a distinguished road Posts: 9
Posted February 7th, 2014 #3
Here it is! I want the audio to play all the way through and not stop based on the participant response (which is working), but I also want it to register multiple responses (and record the times at which they occur), which is not working.

Thanks,
Julia
Attached Files
File Type: zip AudioDualTask.zip (11.71 MB, 12 views)
Reply With Quote
MonikaT
Senior Member
 
Join Date: Mar 2008
MonikaT is on a distinguished road Posts: 1,279
Posted February 10th, 2014 #4
The reason that the responses are not being registered is because the audio event is set to end "Immediately after the event is presented" under the Input tab. To record all responses you should change this to end "Only after a time limit." However, you will want to choose a time limit that is the same duration as the audio clip (or the same as the longest-running clip). Therefore, it might be best to use audio clips that are all the same length (for example having a duration of 10 seconds each).

Another alternative would be to use the "Variable" option on the time limit instead of "Fixed." As long as the trials are not randomized in this experiment, you could create a Trial Variable with these levels:

5894,13989,8882,37880,33019

These match the duration of clips p21 through p25. Then set that trial level to "Sequential" (so that the trial levels are not selected at random). You can find the Trial Variable option under the Experiment menu.
Reply With Quote
Tags
multiple responses
Thread Tools
Posting Rules
Forum Jump:
Copyright Cedrus Corporation, 1991-2014.
All times are GMT -7. The time now is 02:58 PM.