Behavioral and neural biology 36(3), 298-303.

Food-aversion conditioning in Japanese monkeys (Macaca fuscata): Suppression of key-pressing.

Tetsuro Matsuzawa, Yoshinori Hasegawa

Monkeys were trained in a Skinner box to press a key for standard food pellets on a fixed-ratio 10 schedule for 30 min. When stable responding had been achieved, two novel foods (almond nuts and marshmallows) were introduced. In the conditioning sessions on the odd-number days, pressing a key delivered one of the two novel foods as the to-be-conditioned target food, and each monkey was injected cyclophosphamide (4 mg/kg) intravenously in the home cage 10 min after the end of the session. In the control sessions on the even-number days, the monkeys earned the other food, and were never injected. As the conditioning was repeated, the monkeys eventually stopped key-pressing for the target food in the conditioning sessions, but continued to work for and eat the other food in the control sessions.

Click here to download the PDF Please refer to the terms of use before downloading.
Matsuzawa T, Hasegawa Y (1982) Food-aversion conditioning in Japanese monkeys (Macaca fuscata): Suppression of key-pressing. Behavioral and neural biology 36(3), 298-303.