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Classical conditioning occurs when a conditioned stimulus (CS) is paired with an unconditioned stimulus (US). Usually, the conditioned stimulus is a neutral stimulus (e.g., the sound of a tuning fork), the unconditioned stimulus is biologically potent (e.g., the taste of food) and the unconditioned response (UR) to the unconditioned stimulus is an unlearned reflex response (e.g., salivation).
The aim of Watson and Rayner was to condition a phobia in an emotionally stable child. [3] For this study, they chose a nine-month-old infant from a hospital. The child was referred to as "Albert" for the experiment. [4] Watson followed the procedures which Ivan Pavlov had used in his experiments with dogs. [5]
Ivan Petrovich Pavlov (Russian: Иван Петрович Павлов, IPA: [ɪˈvan pʲɪˈtrovʲɪtɕ ˈpavləf] ⓘ; 26 September [O.S. 14 September] 1849 – 27 February 1936) [2] was a Russian and Soviet experimental neurologist and physiologist known for his discovery of classical conditioning through his experiments with dogs.
Edwin Burket Twitmyer (1873–1943) was professor of Psychology and director of the Psychological Laboratory and Clinic at the University of Pennsylvania.He is a little-known figure in the history of psychology, but he independently discovered classical conditioning at approximately the same time as the famous Russian physiologist, Ivan Pavlov, who is normally given credit for this achievement.
In Pavlov's original demonstration of classical conditioning, he used a backward conditioning arrangement as the control condition. Briefly, in that procedure, the dogs experienced the same number of US presentations (food) and the same number of CS presentations (metronome ticking) as the experimental groups, but the timing of the CS and US ...
Classical conditioning has been demonstrated in many species. For example, it is seen in honeybees, in the proboscis extension reflex paradigm. [31] It was recently also demonstrated in garden pea plants. [32] Another influential person in the world of classical conditioning is John B. Watson.
Burrhus F. Skinner (1904-1990) developed operant conditioning, in which specific behaviors resulted from stimuli, which caused them to appear more or less frequently. [4] [23] By the 1920s, John B. Watson's ideas had become popular and influential in the world of psychology and classical conditioning was being explored by other behaviorists ...
Staats, however, notes that food was used by Pavlov to elicit a positive emotional response in his classical conditioning and Thorndike Edward Thorndike used food as the reward (reinforcer) that strengthened a motor response in what came to be called operant conditioning, thus emotion-eliciting stimuli are also reinforcing stimuli. [6]