When cues are transmitted to participants about how they are expected to behave in particular experimental conditions, the research results may reflect expectations. When people develop their own ideas about the topic of the research, the investigation's outcomes may be biased by .

Experimenter, participant expectation

Explanation:

When a research study conforms to a particular set of conditions, hypothesis or the researcher's bias expectations, the research result is said to reflect experimenter expectation. A participant expectation results as an outcome of bias introduced into a research study by the participants for example when a participant want to please the researchers, or develop their own ideas about the topic of the research

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a would be the answer