Final answer:
An experiment involving priming measures the influence of initial stimulus exposure on reactions to subsequent stimuli, often in the realm of cognitive psychology.
Step-by-step explanation:
According to the passage, the experiment that involves "priming" measures how exposure to one stimulus influences a person's response to a subsequent stimulus. Priming can be achieved through various stimuli, including words, pictures, or broader contextual cues. For example, if a person is exposed to words or images associated with a picnic, they may later be more quick to recognize or respond to related stimuli. This is a fundamental concept in cognitive psychology, exploring the nonconscious memory system. The experiment's purpose is to observe this often subtle behavioral influence and quantify its effects.