Sensation versus Perception

Critical Thinking Question

Not everything that is sensed is perceived. Do you think there could ever be a case where something could be perceived without being sensed?

Hint:

This would be a good time for students to think about claims of extrasensory perception. Another interesting topic would be the phantom limb phenomenon experienced by amputees.

Please generate a novel example of how just noticeable difference can change as a function of stimulus intensity.

Hint:

There are many potential examples. One example involves the detection of weight differences. If two people are holding standard envelopes and one contains a quarter while the other is empty, the difference in weight between the two is easy to detect. However, if those envelopes are placed inside two textbooks of equal weight, the ability to discriminate which is heavier is much more difficult.