– The unconditioned stimulus (US) is usually a biologically significant stimulus such as FOOD or PAIN that elicits a response from the start; this is called the unconditioned response or […]
The conditioned response is the learned response to the previously neutral stimulus. [Cherry, Kendra. “What Is a Conditioned Response?”. About.com Guide. About.com. Retrieved 2013-02-10. @http://psychology.about.com/od/cindex/g/condresp.htm]
A stimulus is a factor that causes a response in an organism.