Selective thinking refers to a type of thought process where a person focuses on a specific aspect or idea, while ignoring the others. The term can be used negatively or positively, depending on the context. If the person uses selective thinking to form biased opinions or judgments, it could be harmful. However, if the person uses selective thinking to focus on positive aspects of a situation, it could be beneficial. Some synonyms for selective thinking include cherry-picking, confirmation bias, tunnel vision, and narrow-mindedness. All of these terms describe a similar thought process where the person chooses to focus on a particular aspect and ignores the rest. It's essential to strike a balance between selective and broad thinking to make rational decisions.