PO Box 5729 Lafayette, IN 47903 USA . Tel: 765-423-1505
Operant Conditioning Console
10
Differential Reinforcement of Low Response Rates (DRL)
The set up for DRL is identical to the set up for FI. The only difference in this schedule is the affect of responses
made while the interval timer is timing. See “b.” below.
a. All press bars, the Omni-directional lever, and the shaping push button increment their respective
counters.
b. Reinforcement is given for the first selected/acceptable response to occur after ‘t’ seconds have elapsed.
Responses made on the selected/acceptable response(s) prior to the interval timer timing out reset the
timer back to zero without delivering a reward. The green status light is turned ON to indicate that the
interval timer has timed out. The interval value is set in the Interval Control screen of the set up menu
using the Up and Down buttons. The default value is 1.0 seconds. The maximum value is 99.9 seconds in
0.1 second increments.
c. The shaping pushbutton will deliver reinforcement at any time and will reset the interval timer to zero.
d. The reinforcement counter is incremented for all reinforcements.
e. The CS lights and tones are available and turn ON at the intensity selected from 1 - 20 for as long as the
schedule is running.
f. A single Reset pauses the schedule and turns selected outputs OFF. The green status light flashes while
the schedule is paused. The interval value will return to zero when the schedule is paused. Press Run to
continue and Reset to terminate the schedule. Use the Down button to reveal multiple data screens and
the Up button to return to previous screens while the schedule is running or paused. Data will be lost as
soon as the schedule is terminated.
g. The Shock is OFF.
Differential Reinforcement of High Response Rates (DRH)
This schedule is just the opposite of the DRL and set up uses menu items from both FR and interval schedules.
The task is to complete the FR prior to the interval timing out. Once the interval times out the FR count is
reset to zero.
a. Select acceptable responses and reinforcement options as in previous schedules
b. Ratio Control. Use the Up and Down buttons to set the desired ratio. Press quickly to change values
by 1 unit, hold the button to rapidly increment or decrement the value. The minimum value is 2. The
maximum value is 99.
c. Interval Control. Use the Up and Down buttons to set the desired interval from 0.1 to 99.9 seconds in 0.1
second increments.
d. All press bars, the Omni-directional lever, and the shaping push button increment their respective
counters.
e. The interval timer starts with the first response and is indicated with the green status light turning ON.
Reinforcement is given only if the FR value is met before the interval times out. Once the interval timer
times out and the green status light turns OFF, the ratio count is reset to zero and the interval timer begins
all over with the next response. Only responses made on the selected/acceptable response(s) increment
the ratio counter.
f. The shaping pushbutton will deliver reinforcement at any time. If the interval timer is running, the interval
value resets to zero and continue to run. The ratio count remains unchanged providing the animal an
opportunity to still meet the contingencies of the schedule.
g. The reinforcement counter is incremented for all reinforcements.
h. The CS lights and tones are available and turn ON at the intensity selected from 1 - 20 for as long as the
schedule is running.
i. A single Reset pauses the schedule and turns selected outputs OFF. The green status light flashes while
the schedule is paused. The ratio count and interval values reset to zero when the schedule is paused.
