On each trial in an experiment, a researcher exposes participants to either a pleasant or an unpleasant priming picture for several milliseconds. She then shows participants a picture of a person's face and asks the participants to rate the person's likeability. The researcher is MOST likely studying:

subliminal differences

Explanation:

The meaning of subliminal is something that is difficult to feel and explain; but may be remembered due to constant repetition.

Subliminal messages are stimuli that lie below our threshold of conscious awareness. 

Subliminal differences manipulate our minds and modify our behaviors.

Importantly, research on action priming has shown that subliminal stimuli can trigger only actions a receiver of the message plans to perform.

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jefferson hoped to establish trade with the native american people of the west and find a water route to the pacific. jefferson also was fascinated by the prospect of what could be learned about the geography of the west, the lives and languages of the native americans, the plants and animals, the soil, the rocks, the weather, and how they differed from those in the east.

european feudalism was a combination of legal and military customs in medieval europe that flourished between the 9th and 15th centuries. broadly defined, it was a way of structuring society around relationships derived from the holding of land in exchange for service or labour.

japanese feudalism. the era of feudalism in japan took place from the 12th through 19th centuries. during that period local rulers, either powerful families or military warlords, dominated the land, while the emperor was merely a figurehead and not a significant political presence.