How to collect two key responses within the same time window?

rampriya darshini

I need to collect two responses one followed by the other within 1600ms. I need separate RT's for both the response. Also i would like how to collect RT of the second response relative to the first response in the log file.

Knante

Hi Rampriya,

This older thread might be helpful:

• http://forum.cogsci.nl/index.php?p=/discussion/363/solved-double-space-bar

If you want to calculate and log the absolute RT and the relative RT between the response, you can add and subtract the timestamps within the while True loop of that script. The are quite some threads around on the forum that might help you with that.

Best,
Laurent

rampriya darshini

I'm a beginner to open sesame. I'm still not getting it . any other relevant link from forum would be of great help.

eduard

Hi,

Is this code what you want?

kb = keyboard()

# first response
start_time1 = clock.time()
k1,t1 = kb.get_key()
if k1 != None: 
    response_time1 = t1-start_time1
k2,t2 = kb.get_key(timeout=1600)
if k2 != None:
    response_time2 = t2-t1
else:
    response_time2 = None

Eduard

eduard

Please don't discuss the same issues in two separate threads. It will make the forum very messy!