Understanding Absolute and Difference Thresholds in Sensation

Very Hard Unit 3: Sensation & Perception Sensory Processes

One of the key challenges in understanding sensory processes is the distinction between absolute threshold and difference threshold. The absolute threshold refers to the minimum amount of stimulus energy that can be detected, while the difference threshold (also known as the just noticeable difference or JND) pertains to the smallest detectable difference between two stimuli. Both concepts are essential for understanding sensory perception.

In a recent experiment, researchers tested participants’ ability to perceive differences in light intensity using a series of gradually increasing light levels. They found a specific pattern in participants’ responses that illustrates the difference threshold. Which of the following statements best describes the relationship between absolute threshold and difference threshold based on this experiment?

The absolute threshold varies independently of the difference threshold.

The difference threshold remains constant, regardless of the intensity of the stimulus.

As the intensity of a stimulus increases, the difference threshold generally increases as well.

The absolute threshold is always higher than the difference threshold.

The difference threshold is solely dependent on the type of sensory modality involved.

Hint

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