Important characteristics of Trace Conditioning:
Consider the unconditioned reflex whereby food elicits (US) elicits salivation (UR). In Trace Conditioning, a tone (NS) might briefly sound several seconds before the food (US) is presented. The tone does not sound during the intervening interval. Consequently, the tone (CS) may come to elicit salivation (CR) even in the absence of food. With repeated conditioning trials, salivation may become increasingly delayed to the tone, occurring progressively closer in the time to food delivery. The eliciting effect of the tone may be less pronounced the longer the typical intervening interval between it and the food presentation.