At work on Monday, Lane chats with his friends about the win the previous day of the Chicago Bears football team. Lane's friends, like him, think that the coach of the Bears did a phenomenal job in the game. Following their conversation, Lane has an even more positive attitude toward the coach than he initially had by himself. This example best illustrates: social comparison. group bias. groupthink. group polarization.

This example best illustrates **group polarization**. ### Explanation: 1. **Group Polarization** refers to the phenomenon where individuals in a group tend to adopt more extreme positions or attitudes after discussing a topic with others who share similar views. In this case, Lane's positive attitude toward the coach of the Bears becomes even more positive after chatting with his friends who also think highly of the coach. 2. **Social Comparison** involves individuals evaluating themselves in relation to others, which is not the primary focus here. 3. **Group Bias** refers to the tendency to favor one's own group over others, which is not directly applicable in this scenario. 4. **Groupthink** is a psychological phenomenon where the desire for harmony in a decision-making group leads to irrational or dysfunctional decision-making. This is not the case here, as the focus is on attitude change rather than decision-making. Thus, the correct answer is **group polarization**.