Sentence:  Moreover , when the experimenter did inform those subjects that there were some normal people who did not have their arm rise once they relaxed , the Kohnstamm-positive subjects <WSD>were</WSD> uninfluenced in their subsequent reactions to the Kohnstamm situation . 
Meaning of the word marked with <WSD> tags:  have the quality of being; (copula, used with an adjective or a predicate noun)