While participating in a psychological study you listen to different tones and tell the researcher when you can hear them, most likely to researcher is studying.. a.) top-down processing b.)gustation c.)absolute threshold or d.) subliminal perception

The researcher is most likely studying C. absolute threshold.

Explanation:

Threshold refers a specific intensity which needs to be exceeded in order to obtain a certain reaction. For example, pain threshold.

The absolute threshold refers to the smallest change in a stimulus' intensity in order to be identified by the senses, such as hearing, vision, etc.

In this case, a change in tones requires a low intensity, meaning an almost subtle change can be easily identified by the human sense. It is most likely the researcher is studying your absolute threshold.  

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answer; proximity;