After we have watched the falling of the water in a waterfall for about a minute, if we look at a blank surface, such as a white wall:

Question

BlackTom AI · Accepted Answer

The question asks about what we experience after watching a waterfall for about a minute and then looking at a blank surface. This setup is a classic motion aftereffect phenomenon, where adaptation to downward motion alters subsequent perception.
Option a: 'We will see Benham colors produced by our Reichardt detectors.' This choice mixes two concepts that don’t typically co-occur in this scenario. Benham colors relate to color perception under certain rotating patterns and are tied to color-opponent processes, not to the basic motion aftereffect from a waterfall. Reichardt detectors are a theoretical model of motion detection, but the claim that Benham colors would appear on a blank surface is not supported by standard MAE demonstrations. Therefore this option is not accurate for the described situation.
Option b: 'The perception of motion will be temporarily inhibited.' In motion aftereffects, adaptation changes the perceived motion direction rather than simply reducing motion sensitivity across the board. While some aspects of neural responsiveness are altered after adaptation, the hallmark of the waterfall MAE is an illusory motion in the opposite direction, not a general inhibition of motion perception. Thus this statement mischaracterizes the effect.
Option c: 'We will continue to see the movement of the water heading downwards, consistent with motion aftereffects.' This phrasing describes a persistence of the original motion. However, the typical MAE is not the continuation of the same direction; after looking away, the perceived motion tends to be in the opposite direction, not the same. This option misunderstands the directionality aspect of MAE.
Option d: 'We will get a sense of motion going upward, that is, in the opposite direction of the falling water.' This aligns with the classic motion aftereffect: after adapting to downward motion (water falling), a stationary scene often appears to drift upward, opposite to the adapted motion. This is the standard description of MAE directionality and matches the expected perceptual outcome for this setup.
In summary, options a and b misconstrue the core phenomenon or its typical manifestations, option c wrongly asserts persistence of the original motion direction, and option d accurately captures the opposite-direction illusion that follows adaptation to downward motion like falling water.

After we have watched the falling of the water in a waterfall for about a minute, if we look at a blank surface, such as a white wall:单项选择题

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