In Stolerman & Olufsen (2001) I read the sentence:
After drug-appropriate responding with the training mixtures reached 85%, generalisation to ethanol was examined in extinction tests.
Here is the entire section from the article on the subject of extinction testing:
Extinction test procedure
Effects of test drugs were determined in brief extinction tests of 3 > min duration that took place twice weekly, with normal training sessions continuing on the interven- ing days. Initially, rats were tested once with vehicle and once with the training mixture; they all reached a cri- terion of at least 80% correct responding and they were all used in subsequent experiments. The effects of saline, the single drugs used for training and the training drug mixture were determined in 3-min extinction tests. The different drug treatments were given in random order. Prior to each test, two injections were always given (via the appropriate routes) to equate handling.
What is an extinction test?