What is considered a major disadvantage of personal bias in scientific investigations?

In scientific investigations, personal bias is a significant concern because it can lead to subjective interpretations of data. When a researcher allows their personal beliefs, experiences, or preferences to influence their view, it can cause them to misinterpret results or selectively present data that supports their biases while ignoring contradicting evidence. This subjectivity undermines the objectivity that is essential in scientific research, as science relies on evidence that can be reproduced and is free from personal influence to draw accurate conclusions.

Personal bias disrupts the process of drawing unbiased, evidence-based conclusions, which is why maintaining objectivity is crucial for the integrity of scientific findings.