Using multiple keyboards

Comments

• OmerBirka

  April 2019

  O.K. so I pretty much got it doing what I wanted (1 and 2 for now). I tested it using 1 keyboard for now and it seems to be working.

  Still, if anyone know whether I should expect any technical issues using 3 different keyboards I'll be glad to hear.

  Thanks,

  Omer
• eduard

  April 2019

  Hi Omer,

  I wouldn't expect any problems with 3 keyboards, but still it would make sense to extensively test the procedure.

  
  

  Implementing point 3 shouldn't be very hard. Put an inline_script with the line: `var.start_time = clock.time()`before the keyboard_response item and then in the duration field of each keyboard response item `11000-[start_time]` and maybe another inline_script after the last keyboard_response item, in which you sleep for another second (using the clock.sleep function)

  
  

  I hope this helps,

  Eduard
• OmerBirka

  April 2019

  ...
  var.allkeys = ['q', 'p', 's', 'l', 'z', 'm']
  
  timer = core.CountdownTimer(10.0)
  
  while var.allkeys != [] and timer.getTime() > 0: 	
  	for i in range(500):
  		ds.draw() # prepares the stimulus
  		win.flip() # makes stimulus visible on window
  		var.keys = event.getKeys(keyList=var.allkeys) # begins with all mapped keys eligible
  		
  		if var.keys != []:
  			# participant 1
  			if any(c in var.keys for c in ('q', 'p')): # if this part. responded then -
  				t1 = self.time() # take time
  				response1 = var.keys[0] # save response
  				response_time1 = t1 - t0 # caculates response time
  				exp.set('response1', response1) # log response
  				exp.set('response_time1', response_time1) # log RT
  				if self.get('response1')==self.get('correct_response1'):
  					exp.set('correct1',1) # log accuracy
  				else:
  					exp.set('correct1',0)
  				var.allkeys = [item for item in var.allkeys if item not in ['q', 'p']]
  				if var.allkeys == []: # if this part. was last to respond - finish trial
  					time.sleep(1.0)
  					break
  				continue
  				
  			# participant 2	
  			elif any(c in var.keys for c in ('s', 'l')):
  				t2 = self.time()
  				response2 = var.keys[0]
  				response_time2 = t2 - t0 # caculates response time
  				exp.set('response2', response2)
  				exp.set('response_time2', response_time2)
  				if self.get('response2')==self.get('correct_response2'):
  					exp.set('correct2',1)
  				else:
  					exp.set('correct2',0)
  				var.allkeys = [item for item in var.allkeys if item not in ['s', 'l']]
  				if var.allkeys == []:
  					time.sleep(1.0)
  					break
  				continue
  				
  			# participant 3	
  			elif any(c in var.keys for c in ('z', 'm')):
  				t3 = self.time()
  				response3 = var.keys[0]
  				response_time3 = t3 - t0 # caculates response time
  				exp.set('response3', response3)
  				exp.set('response_time3', response_time3)
  				if self.get('response3')==self.get('correct_response3'):
  					exp.set('correct3',1)
  				else:
  					exp.set('correct3',0)
  				var.allkeys = [item for item in var.allkeys if item not in ['z', 'm']]
  				if var.allkeys == []:
  					time.sleep(1.0)
  					break
  				continue
  

  First - thanks for your reply Eduard.

  This is where I'm at at the moment. It's not neat, my python knowledge is limited, but it is still the closest working version of the idea I'm trying to implement.

  As mentioned before, this covers points 1) and 2) and some of 3) (trial ends if all paricipants answered or after some time had passed) BUT:

  a) Countdown doesn't really count 10 sec, it stops the trial after aprox. 16.6 sec. It seems like I've implented it wrong in some way.

  b) Since my stimulus isn't static, using time.sleep (I've also tried core.wait) results in the stimulus freezing for the sleep/wait duration. I want to stimulus to keep 'running' for a shortwhile after last participant's key press.

  Would appreciate your input once again,

  Omer
• eduard

  May 2019

  Hi Omer,

  I usually don't use pygame functions directly, so I'd need a little more time to read through your code and find out what went awry. Do you still need help on that issue?

  Eduard