During naturalistic observation research, you only focused on information that supported your hypothesis, later research proved that your hypothesis was incorrect. What type of bias did you exhibit?

Confirmation bias.

Explanation:

Confirmation bias may be defined as a type of cognitive bias in which the hypothesis is confirmed by the over weigh evidence. The under weigh evidence are rejected in this confirmation bias.

The confirmation bias mainly focuses on the the observation that can support the hypothesis. Later, the research can prove to be incorrect based on the hypothesis in the confirmation bias.

Thus, the answer is confirmation bias.