| 释义 |
unconditioned stimulus
unconditioned stimulusn. Psychology A stimulus that evokes an unconditioned response.unconditioned stimulus n (Psychology) psychol any stimulus evoking an unlearnt response, esp in the context of classical conditioning, in which the conditioned stimulus is followed by the unconditioned one EncyclopediaSeestimulusunconditioned stimulus
stimulus [stim´u-lus] (L.) any agent, act, or influence that produces functional or trophic reaction in a receptor or an irritable tissue.conditioned stimulus a stimulus that acquires the ability to evoke a given response by repeatedly being linked with another stimulus that naturally evokes that response; see also conditioning.depolarizing stimulus a stimulus that lowers the potential" >resting potential, making the inside of a fiber less negative. In cardiac fibers this means bringing the resting potential from −90 mV to −70 mV.discriminative stimulus a stimulus associated with reinforcement, which exerts control over a given type of behavior; the subject must discriminate between closely related stimuli and respond positively only with this particular stimulus.eliciting stimulus any stimulus, conditioned or unconditioned, that elicits a response.threshold stimulus a stimulus that is just strong enough to elicit a response.unconditioned stimulus any stimulus that naturally evokes a specific response; see also conditioning.un·con·di·tion·ed stim·u·lusa stimulus that elicits an unconditioned response; for example, food is an unconditioned stimulus for salivation, which in turn is an unconditioned response in a hungry animal. See: classical conditioning. unconditioned stimulusn. Psychology A stimulus that evokes an unconditioned response.un·con·di·tioned stim·u·lus (ŭn'kŏn-dish'ŭnd stim'yū-lŭs) That which elicits an unconditioned response; e.g., food is an unconditioned stimulus for salivation, which in turn is an unconditioned response in a hungry animal. unconditioned stimulus The stimulus that evokes an UNCONDITIONED RESPONSE.AcronymsSeeUSThesaurusSeeclassical conditioning |