Psychology in Historical Perspective: Early Developments

Charles Darwin (1872) once postulated that “…natural selection acts only by taking advantage of slight successive variations…” (p. 156). It is through these slight, successive variations, Darwin hypothesized, that some species evolve into other species and some species become extinct over time. In the same way, beginning with Pavlov’s Conditioned Reflexes and John Watson’s Behaviorist Manifesto, behaviorism has... Continue Reading →

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