I’m running PsychoPy version 1.83.04 on a PC running Windows 7 Pro.
I’m trying to create a paradigm in which a stimulus lasts until the participant choses a response, or until a certain amount of time has passed. The first stimulus is simple text “Press the space bar to continue”, along with keyboard feedback that lasts indefinitely and has “force end routine” enable. During stimulus presentation, the participants view videos of actors emoting. After the stimulus has been present for 2 seconds, the system will accept “1” or “2” as an input to indicate emotional valence. The keyboard response has “force end” enabled and is programmed to terminate and move onto the next trial if the participant does not response for 10 seconds.
When the response is quick (i.e. within 2-3 seconds of stimulus onset) the program works smoothly. If there is a longer latency (>5 sec) the stimulus hangs for several seconds before moving onto the next trial. I thought it might be an issue loading the videos on the fly, but I’m seeing the same behavior for the simple text message. When I hit the bar quickly it works smoothly but if I wait a few seconds it hangs before moving onto the stimuli. Unfortunately, I’m not getting any error messages or other system feedback. Have other users encountered similar problems?