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<p><b>Errorless learning</b> was an <a href="Instructional_design" title="Instructional design">instructional design</a> introduced by psychologist <a href="Charles_Ferster" title="Charles Ferster">Charles Ferster</a> in the 1950s as part of his studies on what would make the most effective learning environment. <a href="B._F._Skinner" title="B. F. Skinner">B. F. Skinner</a> was also influential in developing the technique, noting that, </p><blockquote><p>...errors are not necessary for learning to occur. Errors are not a function of learning or vice versa nor are they blamed on the learner. Errors are a function of poor analysis of behavior, a poorly designed shaping program, moving too fast from step to step in the program, and the lack of the prerequisite behavior necessary for success in the program.</p></blockquote><p> Errorless learning can also be understood at a synaptic level, using the principle of <a href="Hebbian_learning" class="mw-redirect" title="Hebbian learning">Hebbian learning</a> ("Neurons that fire together wire together").

</p><p>Many of Skinner's other students and followers continued to test the idea. In 1963, <a href="Herbert_Terrace" class="mw-redirect" title="Herbert Terrace">Herbert Terrace</a> wrote a paper describing an experiment with pigeons which allows <a href="Discrimination_learning" title="Discrimination learning">discrimination learning</a> to occur with few or even with no responses to the negative stimulus (abbreviated S−). A negative <a href="Stimulus_(psychology)" title="Stimulus (psychology)">stimulus</a> is a stimulus associated with undesirable consequences (e.g., absence of <a href="Reinforcement" title="Reinforcement">reinforcement</a>). In discrimination learning, an error is a response to the S−, and according to Terrace errors are not required for successful discrimination performance.

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<div class="mw-heading mw-heading2"><h2 id="Principles">Principles</h2></div>

<p>A simple discrimination learning procedure is one in which a subject learns to associate one stimulus, S+ (positive stimulus), with reinforcement (e.g. food) and another, S− (negative stimulus), with extinction (e.g. absence of food). For example, a pigeon can learn to peck a red key (S+), and avoid a green key (S−). Using traditional procedures, a pigeon would be initially trained to peck a red key (S+). When the pigeon was responding consistently to the red key (S+), a green key (S−) would be introduced. At first the pigeon would also respond to the green key (S−) but gradually responses to this key would decrease, because they are not followed by food, so that they occurred only a few times or even never.

</p><p>Terrace (1963) found that discrimination learning could occur without errors when the training begins early in <a href="Operant_conditioning" title="Operant conditioning">operant conditioning</a> and visual stimuli (S+ and S−) like colors are used that differ in terms of brightness, duration and wavelength. He used a fading procedure in which the brightness and duration differences between the S+ and the S− were decreased progressively leaving only the difference in wavelength. In other words, the S+ and S− were initially presented with different brightness and duration, i.e., the S+ would appear for 5 s and fully red, and the S− would appear for 0.5 s and dark. Gradually, over successive presentations, the duration of the S− and its brightness were gradually increased until the keylight was fully green for 5 s.

</p><p>Studies of <a href="Implicit_memory" title="Implicit memory">implicit memory</a> and <a href="Implicit_learning" title="Implicit learning">implicit learning</a> from <a href="Cognitive_psychology" title="Cognitive psychology">cognitive psychology</a> and cognitive neuropsychology have provided additional theoretical support for errorless learning methods (e.g., Brooks and Baddeley, 1976, Tulving and Schacter, 1990). Implicit memory is known to be poor at eliminating errors, but can be used to compensate when <a href="Explicit_memory" title="Explicit memory">explicit memory</a> function is impaired. In experiments on amnesiac patients, errorless implicit learning was more effective because it reduced the possibility of errors "sticking" in amnesiacs' memories.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup>

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<div class="mw-heading mw-heading2"><h2 id="Effects">Effects</h2></div>

<p>The errorless learning procedure is highly effective in reducing the number of responses to the S− during training. In Terrace's (1963) experiment, subjects trained with the conventional discrimination procedure averaged over 3000 S− (errors) responses during 28 sessions of training; whereas subjects trained with the errorless procedure averaged only 25 S− (errors) responses in the same number of sessions.

</p><p>Later, Terrace (1972) claimed not only that the errorless learning procedure improves long-term discrimination performance, but also that: 1) S− does not become aversive and so does not elicit "aggressive" behaviors, as it often does with conventional training; 2) S− does not develop <a href="Inhibitory" class="mw-redirect" title="Inhibitory">inhibitory</a> properties; 3) positive <a href="Behavioral_contrast" title="Behavioral contrast">behavioral contrast</a> to S+ does not occur. In other words, Terrace has claimed that the "by-products" of conventional discrimination learning do not occur with the errorless procedure.

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<div class="mw-heading mw-heading2"><h2 id="Limits">Limits</h2></div>

<p>Some evidence suggests that errorless learning may not be as qualitatively different from conventional training as Terrace initially claimed. For example, Rilling (1977) demonstrated in a series of experiments that these "by-products" can occur after errorless learning, but that their effects may not be as large as in the conventional procedure; and Marsh and Johnson (1968) found that subjects given errorless training were very slow to make a discrimination reversal.

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<div class="mw-heading mw-heading2"><h2 id="Applications">Applications</h2></div>

<p>Interest from psychologists studying basic research on errorless learning declined after the 1970s. However, errorless learning attracted the interest of researchers in <a href="Applied_psychology" title="Applied psychology">applied psychology</a>, and studies have been conducted with both children (e.g., educational settings) and adults (e.g. <a href="Parkinson's" class="mw-redirect" title="Parkinson's">Parkinson's</a> patients). Errorless learning continues to be of practical interest to animal trainers, particularly dog trainers.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup>

</p><p>Errorless learning has been found to be effective in helping memory-impaired people learn more effectively.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> The reason for the method's effectiveness is that, while those with sufficient memory function can remember mistakes and learn from them, those with memory impairment may have difficulty remembering not only which methods work, but may strengthen incorrect responses over correct responses, such as via emotional stimuli. See also the reference by Brown to its application in teaching mathematics to undergraduates.

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<ul><li><a href="Evidence-based_learning" class="mw-redirect" title="Evidence-based learning">Evidence-based learning</a></li></ul>

<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>

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<li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text">Baddeley, A.D. and Wilson, B.A. (1994) When implicit learning fails: Amnesia and the problem of error elimination. Neuropsychologia, 32(1), 53-68.</span>

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</style><cite id="CITEREFJesus_Rosales-Ruiz2011" class="citation journal cs1">Jesus Rosales-Ruiz (July 2011). <a rel="nofollow" class="external text" href="http://stalecheerios.com/blog/wp-content/uploads/2011/07/Teaching-Dogs-the-Clicker-Way-JRR.pdf">"Teaching Dogs the Clicker Way"</a> <span class="cs1-format">(PDF)</span>. <i>Teaching Dogs</i>.</cite></span>

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<li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text">B. Wilson (2009) Memory Rehabilitation: Integrating Theory and Practice, The Guilford Press, 284 pages.</span>

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<ul><li>R. Brown, <a rel="nofollow" class="external text" href="https://math.stackexchange.com/q/182912">Getting students not to fear confusion</a> (2012) Using these ideas for undergraduate teaching of mathematics!</li>

<li>BF Skinner biography. <a rel="nofollow" class="external text" href="http://faculty.coe.uh.edu/smcneil/cuin6373/idhistory/skinner.html">B.F. Skinner</a></li>

<li>Rosales Ruiz, J. (2007). 'Teaching Dogs the Clicker Way' In: <i>Teaching Dogs Magazine</i>, May/June 2007.</li>

<li>Mazur, J.E. (2006). <i>Learning and behavior</i>. 6th edition. Upper Saddle River, NJ: Prentice Hall.</li>

<li>Rilling, M. (1977). Stimulus control and inhibitory processes. In: W.K. Honing & J.E.R Staddon (Orgs.), <i>Handbook of operant behavior</i> (pp. 432–480). Englewood Cliffs, NJ: Prentice-Hall.</li>

<li>Skinner, B. F. (1937). Two types of conditioned reflex: a reply to Konorski and Miller. <i>Journal of General Psychology</i>, 16, 272-279.</li>

<li>Skinner, B. F. (1938). The Behavior of Organisms. New York: Appleton-Century-Crofts.</li>

<li>Skinner, B. F. (1953). Science and Human Behavior. New York: Macmillan.</li>

<li>Terrace, H.S. (1963). Discrimination learning with and without "errors". <i>Journal of the Experimental Analysis of Behavior</i>, 6, 1–27.</li>

<li>Terrace, H.S. (1972). By-products of discrimination learning. In G.H. Bower (Ed.), <i>The psychology of learning and motivation</i> (Vol. 5). New York: Academic Press.</li></ul></div><div><div class="zim-footer">

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