What term describes the ability to detect an object amongst distractor objects in situations in which the number of distractors presented is unimportant?

Pop-out.

Explanation:

The ability to detect an object amongst distractor objects in situations in which the number of distractors presented is unimportant is called the pop-out ability. This ability occurs when an object is clearly identified among distractors. An object pops-out noticeably from the other objects. This is also called the pop-out phenomenon.

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