Fixation: Fixation is a cognitive bias where an individual becomes stuck on one particular way of thinking or problem-solving and fails to consider other possible approaches.
Insight: Insight refers to sudden and often unexpected understanding or realization of a problem's solution. It involves a shift in thinking that allows individuals to see connections between previously unrelated pieces of information.
Mental set: Mental set is a tendency to approach problems in a specific way based on previous experiences and knowledge. It can either facilitate problem-solving by providing effective strategies or hinder it by limiting flexibility and creativity.