Question 1

What is the absolute threshold in sensation?

Accepted Answer

The minimum stimulus intensity needed to detect a stimulus 50% of the time. It represents the boundary between detecting and not detecting a stimulus.

Question 2

What does Weber's Law state about the just noticeable difference (JND)?

Accepted Answer

The JND between two stimuli is a constant proportion of the original stimulus. For example, if you need a 10% increase to notice a difference, that proportion stays constant regardless of the starting intensity.

Question 3

What is the difference threshold (just noticeable difference)?

Accepted Answer

The minimum difference in intensity between two stimuli that a person can detect 50% of the time. It is also called the JND.

Question 4

What is signal detection theory, and what two factors does it emphasize?

Accepted Answer

Signal detection theory explains how we detect stimuli by accounting for both the stimulus intensity (sensitivity) and the observer's decision criteria (bias), acknowledging that detection is not an all-or-nothing process.

Question 5

What is subliminal perception?

Accepted Answer

The processing of stimuli that occur below the absolute threshold for conscious awareness. Research suggests subliminal stimuli can influence attitudes but have limited strong behavioral effects.

Sensation & Perception: AP Psychology Exam Prep

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