Cartesian Reflex Project Data
Sample Stimuli for Cartesian Reflex Training

CS+ and CS- for a Differential Conditioning Procedures
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CS+ trials                             CS- Trials

CSs and USs for Acquisition and Extinction Procedures
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CS+ Trials with white “Blink”       CS+ Trials with black “Blink”
CS Probe Trials

Sample Data from Cartesian Reflex Training
 
Subject 010
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Subject 010 wearing the headgear to record eyelid movement
 
Differential Conditioning Procedure
The first 20 trials were to CS+. Sixteen were reinforced and four were not. This phase was designed to establish and evaluate a CR. The intertrial interval (ITI) was 5 seconds. This phase was followed without interruption by a series 80 trials, 40 to CS+ and 40 to CS- presented in a random order. The CS+ was a gray square on the green surround (see above). The duration of the square was 1000 ms. The word “Blink” appeared in the center of the square 500 ms after the square’s onset, for a CS-US interval (ISI) of 500 ms. The CS- was another gray square of a lighter shade and somewhat smaller in size as shown above. As with CS+ this square was projected for 1000 ms per trial, but without the blink command. Differential conditioning procedures dictate that only one screen appear per trial. That is, the two figures do not appear simultaneously but are separated by at least 5 seconds, the ITI.
The above figures show the average waveforms for CS+ trials (n = 56) and CS- trials (n = 40). In this task the subject did not anticipate the blink command, hence did not acquire a CR.

Acquisition and Extinction Procedure
CS+ was presented for 80 trials. The intertrial interval (ITI) was 8 seconds. This phase was followed without interruption by a series 20 trials extinction trials. The CS+ was a red circle on the gray surround (see above). The duration of the circle was 500 ms. The word “Blink” (in white) appeared in the center of the square 250 ms after the circle’s onset, for a CS-US interval (ISI) of 250 ms. Extinction trials consisted of a red square on the gray surround without the “Blink” command projected for 500 ms per trial. In this procedure the ISI was 250 ms, as opposed to the 500 ms ISI in the differential procedure.
The above data shows the average waveforms for acquisition trials (n = 80) and extinction trials (n = 20). In this task the subject anticipated the blink command, thereby demonstrating acquisition of a CR.

Subject 015
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Subject 015 wearing the headgear to record eyelid movement.
 
Differential Conditioning Procedure
The first 20 trials were to CS+. Eighteen were reinforced and two were not. This phase was designed to establish and evaluate a CR. The intertrial interval (ITI) was 8 seconds. This phase was followed without interruption by a series 80 trials, 40 to CS+ and 40 to CS- presented in a random order. The CS+ was a gray square on the green surround (see above). The duration of the square was 500 ms. The word “Blink” appeared in the center of the square 250 ms after the square’s onset, for a CS-US interval (ISI) of 250 ms. The CS- was another gray square of a lighter shade and some what smaller. As with CS+ this square was projected for 500 ms per trial, but without the blink command.
The above data shows the average waveforms for CS+ trials (n = 58) and CS- trials (n = 40). In this task the subject anticipated the blink command, thereby demonstrating acquisition of a CR.

Subject 005
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Subject 005 wearing the headgear to record eyelid movement.
 
Acquisition and Extinction Procedure
CS+ was presented for 80 trials. The intertrial intervals (ITIs) were 6, 7, or 8 seconds and varied randomly. This phase was followed without interruption by a series 20 trials extinction trials. The CS was a red circle on the gray surround (see above). The word “Blink” appeared in the center of the circle 250 ms after the circle’s onset, for a CS-US interval (ISI) of 250 ms. “Blink” appeared in white letters on 57 trials and in black on the remaining 28 trials in a random order. Extinction trials consisted of a red circle on the gray surround without the “Blink” command projected for 500 ms per trial. During the extinction phase, reinforced trials were presented on occasional trials except during the last 6 trials which were all extinction trials.
The above data shows the average waveforms for acquisition trials with the “Blink” command (n = 85) and extinction trials (n = 15). In this task the subject anticipated the blink command, thereby demonstrating acquisition of a CR.

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Copyright © 2004 John W. Moore