Ivan Pavlov, a Russian physiologist, won the Nobel
Prize for his work on digestion in 1904. The father of behaviourism, he
identified conditioned reflexes in dogs using pouches that collected their
saliva. This physiological response to external stimuli (Conditioned reflexes)
was to shape the study of learning for most of the early and middle 20th
century. Positively, it resulted in the detailed study of innate and
conditioned stumulus-led behaviour. Negatively, it relied too much on animal
studies and ignored the importance of mental events and an over-simplistic
model of learning shaped by control through conditioning..
Classical
conditioning
Observing
that dogs salivate as soon as they see their feeder or food, or smell the food,
Pavlov speculated on whether a natural stimulus could be associated with
another unrelated stimulus, eliciting the same response. The experiment starts
with an ‘unconditioned stimulus’ (UCS) that causes a natural response, namely
the sight or smell of food that causes the dog to salivate, the ‘unconditioned
response’ (UCR). If we then ring a bell, immediately followed by food, repeated
several times, after a time, the dog will salivate, a ‘conditioned response’
(CR) at just the sound of the bell, the ‘conditioned stimulus’ (CS). The dog
has now associated the bell with food. If the experiment is reversed and no
food accompanies the bell, the response eventually disappears, this is called
extinction.
In
an interesting aside, Pavlov killed off 30 dogs before getting his surgical
procedure right for these experiments and got his dogs from thieves who
routinely included collared pets in their supposed round ups of street dogs.
Dark
side of Pavlov’s research
Few
know of Pavolov’s later research into the deliberate use of disorientation in
humans to create disordered states. As a behaviourist Pavlov was supported by
the Communists and fuelled research into control mechanisms, as their aim was
mind control on a global scale.
(Some
argue that capitalism did and does the same through advertising.) He
concentrated on conflicting stimuli, forcing the subject choose. This would be
familiar to anyone involved in psychological warfare and torture.
Some
have argued that Pavlov’s later research influenced the German psychologist, Kurt
Lewin, who moved to the US in1933, and influenced Dewey, leading to ‘whole-word’
teaching of literacy, now regarded as having had a massive negative effect on literacy.
So although Pavlov’s work had no real direct bearing on education and training,
indirectly its impact was huge. He had set in motion a school of psychology
that was to dominate psychology for decades – behaviourism, and still has strong
vestigial effects.
Mager,
Gagne & Kirkpatrick
Behaviourism
lives on in Mager’s ‘performance objectives’ and Gagne’s recommendation that ‘learning
objectives’ be placed at the start of every course. It is also the basis of
end-point evaluation in the Kirkpatrick model. Ultimately, however, it was
dealt a serious blow by Chomsky in 1959 and the fresher approaches of cognitive
psychology.
Conclusion
Pavlov
was an excellent physiologist but physiology is not the same as psychology. His
work led to a rather mechanistic view of psychology, relying too much on animal
experiments, ultimately ignoring the sophistication of the brain and organism.
Behaviourism tried to cope with this and modified theories, known as S-O-R
theories (Stimulus-Organism-Response), recognised that the person's motivation
and other dispositions need to be taken into account. However, it remained
limited by its narrow definitions of what constituted evidence – observed behaviour,
a strictly positivist definition of evidence around behaviour. In
human terms we can see that his work accounts for learning by association.
Bandura
and others showed that this was a very much more complex affair than simple
reflexes.
Bibliography
Pavlov, I. P. (1927). Conditioned reflexes.
London: Routledge and Kegan Paul
Boakes, R.
A. (1984). From Darwin to behaviourism. Cambridge: Cambridge University
Press.
Luria A. L.
(1932) The Nature of Human Conflicts
Biography
and lectures online
Interactive
Pavlov’s dog learning game
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