Publications of Place that refer to Brewer (1974). There is no convincing evidence for operant or classical conditioning in adult humans.

Place, U. T. (1989c). Concept acquisition and ostensive learning: a response to Professor Stemmer. Behaviorism, 17, 141-145.
The alternative offered by Professor Stemmer to cognitivist theories of the process whereby general terms acquire their meaning is criticised in its turn on the grounds that it presents an oversimplified view of the complex processes involved in the acquisition of word meanings.
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