The word operandum, featured in this morning's post about highbrow spam, is as yet unknown to the Oxford English Dictionary. But nearly 50 years ago, it was the title of a paper by none other than B.F. Skinner — "Operandum", J. Exp. Anal. Behav. 5(2), 1962 — which reads in its entirety:
An editor recently objected to manipulandum as "not in the dictionary." (A form, manipulare, of which it could conceivably be the gerundive, is only late medieval Latin and therefore lacking in status.) Tolman, who seems to have introduced the term, defines manipulanda as "the characters of objects which support motor activity." In current usage, they are the objects themselves. Strictly speaking, the term does not describe a device such as a foot-pedal or a voice-key which is not operated by hand, but manipulate has long since been generalized beyond that restriction.
A better and simpler word can be derived from operari. A piece of apparatus operated by an organism could appropriately be called an operatus, but this is dangerously close to a pun and would certainly be confusing. The gerundive operandum ought to be considered, however, as an alternative to manipulandum. It is close to operant, and its similarity to manipulandum and operate makes its meaning obvious.
Read the rest of this entry »