Neutral stimulus
Encyclopedia
A neutral stimulus is a stimulus
Stimulus (physiology)
In physiology, a stimulus is a detectable change in the internal or external environment. The ability of an organism or organ to respond to external stimuli is called sensitivity....

 which initially produces no specific response other than focusing attention
Attention
Attention is the cognitive process of paying attention to one aspect of the environment while ignoring others. Attention is one of the most intensely studied topics within psychology and cognitive neuroscience....

. In classical conditioning
Classical conditioning
Classical conditioning is a form of conditioning that was first demonstrated by Ivan Pavlov...

, when used together with an unconditioned stimulus, the neutral stimulus becomes a conditioned stimulus.
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