Operant eyelid conditioning of severely retarded children

Delay of positive reinforcement in instrumental eyelid conditioning.

“…Any response which occurred during the CS and had a latency and magnitude meeting the standard classical CR criteria caused immediate activation of the light bulb and counter. In addition to the above, conditioning of the eyeblink as a free operant has been reported recently by Keehn, Lloyd, Hebbs, and Johnson (1965) and by Keehn (1965).…”