room by himself and observe something that no one else could observe. What a man observed in
the room would be his own experience. Now, in this way something goes on in the throat or the
body of the individual which no one else can observe. There are, of course, scientific instruments
that can be attached to the throat or the body to reveal the tendency toward movement. There are
some movements that are easily observable and others which can be detected only by the individual
himself, but there is no qualitative difference in the two cases. It is simply recognized that the
apparatus of observation is one that has various degrees of success. That, in brief, is the point of
view of Watson's behavioristic psychology. It aims to observe conduct as it takes place, and to
utilize that conduct to explain the experience of the individual without bringing in the observation of
an inner experience, a consciousness as such.
There was another attack on consciousness, that of William James in his 1904 article entitled,
"Does 'Consciousness' Exist?"[2] James pointed out that if a person is in a room the objects of the
interior can be looked at from two standpoints. The furniture, for instance, may be considered from
the standpoint of the person who bought it and used it, from the point of view of its color values
which attach to it in the minds of the persons who observe them, its aesthetic value, its economic
value, its traditional value. All of these we can speak of in terms of psychology; they will be put into
relationship with the experience of the individual. One man puts one value upon it and another gives
it another value. But the same objects can be regarded as physical parts of a physical room. What
James insisted upon was that the two cases differ only in an arrangement of certain contents in
different series. The furniture, the walls, the house itself, belong to one historical series. We speak
of the house as having been built, of the furniture as having been made. We put the house and
furniture into another series when one comes in and assesses these objects from the point of view
of his own experience. He is talking about the same chair, but the chair is for him now a matter of
certain contours, certain colors, taken from his own experience. It involves the experience of the
individual. Now one can take a cross-section of both of these two orders so that at a certain point
there is a meeting of the two series. The statement in terms of consciousness simply means the
recognition that the room lies not only in the historical series but also in the experience of the
individual. There has been of late in philosophy a growing recognition of the importance of James's
insistence that a great deal has been placed in consciousness that must be returned to the so-called
objective world.[3]
Psychology itself cannot very well be made a study of the field of consciousness alone; it is
necessarily a study of a more extensive field. It is, however, that science which does make use of
introspection, in the sense that it looks within the experience of the individual for phenomena not
dealt with in any other sciences —phenomena to which only the individual himself has experiential
access. That which belongs (experientially) to the individual qua individual, and is accessible to him
alone, is certainly included within the field of psychology, whatever else is or is not thus included.
This is our best clue in attempting to isolate the field of psychology. The psychological datum is best
defined, therefore, in terms of accessibility. That which is accessible, in the experience of the
individual, only to the individual himself, is peculiarly psychological.
I want to point out, however, that even when we come to the discussion of such "inner" experience,
we can approach it from the point of view of the behaviorist, provided that we do not too narrowly
conceive this point of view. What one must insist upon is that objectively observable behavior finds
expression within the individual, not in the sense of being in another world, a subjective world, but in
the sense of being within his organism. Something of this behavior appears in what we may term
"attitudes," the beginnings of acts. Now, if we come back to such attitudes we find them giving rise
to all sorts of responses. The telescope in the hands of a novice is not a telescope in the sense that
it is to those on top of Mount Wilson. If we want to trace the responses of the astronomer, we have
to go back into his central nervous system, back to a whole series of neurons; and we find
something there that answers to the exact way in which the astronomer approaches the instrument
under certain conditions. That is the beginning of the act; it is a part of the act. The external act
which we do observe is a part of the process which has started within; the values[4] which we say
the instrument has are values through the relationship of the object to the person who has that sort
of attitude. If a person did not have that particular nervous system, the instrument would be of no
value. It would not be a telescope.
In both versions of behaviorism certain characteristics which things have and certain experiences
which individuals have can be stated as occurrences inside of an act.[5] But part of the act lies
within the organism and only comes to expression later; it is that side of behavior which I think