Human-eyelid conditioning was the principal source of information on Pavlovian conditioning, especially human, in the 1950s and 1960s, but it suffered a sharp decline in productivity, beginning in the late 1960s. The present article treats the decline as a case study with potential implications concerning the survival contingencies of research specialties. We make use of questionnaire data from eyelid-conditioning researchers and examine a variety of publication, topic-of-investigation, and institutional data to identify the major factors in the decline (...) of human-eyelid conditioning. (shrink)