Answer:
If an individual who is conducting a research study pays more attention to observations that agree with his or her general understanding of some topic of study, this person is limiting the results of the study and won't discover anything new.
Step-by-step explanation:
This would happen because he/she is just paying attention just to the details that agree with his/her general understanding, what he/she already knows or suspects, what agree with his/her own beliefs and not to the new ones that would be a surprise or unimaginable. By doing this, you could never discover something, it is not a proper research, because what you're actually doing is looking for documents that support the argument you already have.