MEDSTATE NOTATION REPOSITORY CHANGELOG
5CSRT

INFORMATION
Maintainer           Gary Bamberger
Original author      Gary Bamberger
Current version      1.0
Date last modified   Sep-28-201
MED-PC version       4

DESCRIPTION
0.1
The 5-choice serial reaction time task is an operant procedure designed to measure attention and impulsivity. Animals are trained to respond to brief flashes of light in one of five apertures. Failure to do so during stimulus presentation or during a specified period afterwards (the limited hold period) results in a timeout; a period of darkness in which no rewards can be obtained. Responses before stimulus presentation are similarly punished. This version allows for the presentation of auditory signals during the ITI, to indicate the onset of the stimulus.
1.0
Animals are required to respond to brief flashes of light presented randomly in one of five spatial locations.  Testing begins with the onset of the House Light and the Pellet or Dipper Receptacle Light.  A Head Entry issues a Free Reward Presentation, initiates the Session Timer.  Following the Reward Interval an ITI is activated for the first Trial.  Nose poking during the ITI results in a Time Out and is recorded as a Premature Response.  Stimulus Time Outs also occur following an Incorrect Response, or following an Error of Omission (failure to respond within the Limited Hold Interval).

By default this procedure runs for 50 Trials or 30 minutes starting with a fixed ITI Interval of 5 seconds and fixed Stimulus Presentation of 0.5 seconds.  Both can be randomized by adding to the LIST statements.  The Time to Respond (Limited Hold) is 5 seconds while Premature Responses add a 5 second Time Out before repeating the ITI.  Incorrect Responses or Errors of Omission add a 5 second Time Out before starting a new Trial.  Responses in Time Out reset the Time-Out Timer. 

CHANGELOG
0.1
Program written
1.0
Program extensively re-written



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