10:50AM BST 09 Jun 2014. â¢ DONALD DUCK was created by Walt Disney when he heard Clarence Nash doing his duck voice while reciting Mary Had a Little Lamb. Disney wanted a character that was more negative than Mickey Mouse, so the bad-tempered Duck was born.
Auditory brainstem response (ABR) audiometry is a neurologic test of auditory brainstem function in response to auditory (click) stimuli. First described by Jewett and Williston in 1971, ABR audiometry is the most common application of auditory evoked responses. Test administration and interpretation is typically performed by an audiologist. This article provides an overview of the test and its most common applications.
Usually, the conditioned stimulus (CS) is a neutral stimulus (e.g., the sound of a tuning fork), the unconditioned stimulus (US) 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).lassical conditioning differs from operant or instrumental conditioning: in classical conditioning, behavioral responses are elicited by antecedent stimuli, whereas in operant conditioning behaviors are strengthened or weakened by their consequences (i.e., reward or punishment).