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The hypothesis was originally formulated to describe choice behaviour among concurrently available chained schedules of reinforcement; [2] however, the basic principle of delay reduction () as the basis for determining a stimulus’ conditionally reinforcing function can be applied more generally to other research areas.
Spontaneous recovery is a phenomenon of learning and memory that was first named and described by Ivan Pavlov in his studies of classical (Pavlovian) conditioning.In that context, it refers to the re-emergence of a previously extinguished conditioned response after a delay. [1]
A 2011 brain imaging study of a sample from the original Stanford participants when they reached mid-life showed key differences between those with high delay times and those with low delay times in two areas: the prefrontal cortex (more active in high delayers) and the ventral striatum, (more active in low delayers) when they were trying to ...
Classical conditioning occurs when a conditioned stimulus (CS) is paired with an unconditioned stimulus (US). Usually, the conditioned stimulus is a neutral stimulus (e.g., the sound of a tuning fork), the unconditioned stimulus 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).
Periodically, a tone was presented, for a brief amount of time, which co-terminated with electric shock to the metal floor (classical delay conditioning). The rats, upon receipt of the first shock, displayed the expected unconditional responses to the shock (e.g., jumping, squealing, urinating, etc.), however with subsequent presentations of ...
For example, a rat can be trained to push a lever to receive food whenever a light is turned on; in this example, the light is the antecedent stimulus, the lever pushing is the operant behavior, and the food is the reinforcer. Likewise, a student that receives attention and praise when answering a teacher's question will be more likely to ...
These costs and risks create situations in which the fitness of the individual is threatened. There are several examples that show how reward delay occurs in the real world. For example, animals that eat fruit have the option of eating unripe fruit right away, or waiting, delaying gratification, until it becomes ripe.
Sensory preconditioning is an extension of classical conditioning.Procedurally, sensory preconditioning involves repeated simultaneous presentations (pairing) of two neutral stimuli (NS, e.g. a light and a tone), i.e. stimuli that are not associated with a desired unconditioned response (UR, e.g. salivation).