Phl 303
Lecture 12: The Behaviorist Theory of Mind


Today's Lecture: The Behaviorist Theory of Mind

I. Three Theories of the Mind
II. Behaviorism as a version of Physicalism
III. Implications for Education and Government
IV. Skinner's Theory of Value

I. Three Theories of the Mind

A. Hylomorphism (Aristotle, Aquinas)


The mind is an aspect of the soul, which is the form of the body.
Depends on the application of formal and final causation.
The body's having a "form" in Aristotle's sense is dependent on its having a final cause (natural functions).

B. Dualism (Descartes)


The mind is a separate entity, that interacts with the body.
Depends on the existence of non-physical, unobservable entities, and on the incompleteness of physical causation.

C. Physicalism (Hobbes, Skinner)

No final causation, and a closed & complete network of physical causes.

Two varieties:

  1. Eliminationism. Mental states -- beliefs, desires, attitudes, perceptions -- do not really exist.
    They are the myths, elements of a pre-scientific picture of human beings.
  2. Reductionism. Mental states are a special kind of physical/chemical state.
    Science should look for "bridge laws" that link mental and physical states.

Skinner is an eliminationist.
Reductionism has not fared well in 20th century.

Three related problems for reductionism:

  1. Mental states involve final causation, natural functions. The final cause of belief is knowledge.
    " " " " desire is fulfillment.
    " " " " hunger is eating food.
    " " " " fear is safety.
    " " " " love is the good of the beloved.

  2. Mental states have the property of intentionality -- they are about something. I can "see" something that isn't there.
    Any false belief is about an unreal situation.
    E.g., I believe in Clinton's honesty.

    How can there be, in physics, a real relation to an unreal object?

    Intentionality is connected to final causation: a belief is about a certain kind of situation if that belief is supposed to be formed only when that kind of situation is known to be present.

  3. The problem of multiple realizability. The same mental state could be realized by infinitely many different physical states.
    The same belief can be shared by people whose brains are quite different, even by creatures of different species.
    Even -- aliens who are silicon-based, or androids with electronic brains.

    This is a characteristic feature of teleological states: the same end can be achieved by infinitely many different means.

    Screwdrivers can be made of many different materials, in many different shapes or forms (power vs. manual).

    More than 30 different kinds of eyes in nature.

II. Behaviorism as a Version of Physicalism

Early version of physicalism: stimulus response model.

Build a simple, 2-column table:
inputs in first column, outputs in second.

Operant conditioning: includes a kind of "memory" of past experience.

Possibility of positive and negative reinforcement.
X is a positive reinforcement of behavior Y if and only if the association of X with Y makes the repetition of Y more likely.

Human beings are finite automata.

Represent by a more complicated table.

Rows: possible inputs (environmental conditions).
Columns: possible internal states.

In each square, we put two things:

  1. The output, behavior produced.
  2. The new internal state into which the subject is transformed. (This new state may include, in effect, a "memory" of past behaviors and associated inputs.)
Everything is finite: finitely many inputs (conditions to which the subject is potentially sensitive), finitely many internal states, finitely many possible behaviors.

III Implications of Behaviorism for Education and Government

A. Education -- especially moral, character education.

Classical (teleological) view: there is a fundamental distinction between manipulation and education.

Education:

Manipulation: