ABSTRACT
See also Commas with nonrestrictive, as opposed to restrictive, modifiers, and Commas and subordination: Adverbial clauses.
between. The preposition between, when it does not occur as part of a compound adjective, takes either a plural noun or a pair of nouns as its complement: Pair type was varied between subjects; subjects discriminated between Stimulus A and Stimulus B. Therefore, one cannot say that Subjects discriminated between a pair or that there are differences between performance on implicit and explicit memory. Subjects either discriminate between the two elements that make up a pair, or between one pair and another; and the aforementioned differences presumably occur between performance on implicit memory and performance on explicit memory. Like-
wise, one cannot say that between each trial, the rat was removed from the test box, because this could only have happened between trials.
