Which of the following statements is TRUE regarding behaviorist attitudes toward the study of cognition before cognitive science was established as a scientific discipline?
o Behaviorists believed psychologists should avoid speculating about unobservable mental states.
o All of these choices are valid
o Behaviorism was the dominant approach within psychology; behavior could only be explained via stimulus-response mechanisms.
o Behaviorists believed psychologists should confine themselves to the study of measurable phenomena.