AP Psychology Practice Test

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Study for the AP Psychology Exam with a comprehensive quiz that includes flashcards and multiple choice questions. Each question is accompanied by hints and explanations to enhance understanding. Prepare effectively for your exam!

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What defines the 'absolute threshold'?

The highest level of stimulus we can perceive
The minimum stimulus intensity that can evoke a response
The minimum stimulation needed to detect a particular stimulus half the time
The limit beyond which stimuli become harmful

The correct answer is: The minimum stimulation needed to detect a particular stimulus half the time

The absolute threshold is defined as the minimum stimulation needed to detect a particular stimulus half the time. This concept is critical in the field of psychophysics, which studies the relationship between physical stimuli and the sensations they produce. It represents the point at which a stimulus goes from being undetectable to detectable, and is commonly measured using various sensory modalities, such as vision, hearing, and touch. When this threshold is reached, an individual has a 50% chance of detecting the stimulus. This statistical aspect is essential, as it emphasizes that detection is not merely about the presence of a stimulus but also involves perceptual and psychological factors that influence our sensory experiences. Understanding absolute threshold helps in exploring how different individuals may perceive stimuli differently based on various factors, such as sensory adaptation or attention.