Rationality |
The assumption that people make decisions based on objective analysis of information available to them, and based on their short- and long-term goals. Example: In classical economics, it is assumed that all consumers are rational in their decisions. |
Decision-making |
The process of making a choice among different possible options, based on available information, preferences, and beliefs. Example: The study of neuroscience has shed light on how the brain works during decision-making. |
Biases |
Systematic errors in judgment or decision-making, often arising from cognitive shortcuts or heuristics, and from social or emotional factors. Example: Loss aversion bias refers to the tendency of people to experience losses more strongly than gains, resulting in risk-averse behavior. |
Nudges |
Interventions or prompts that aim to influence behavior in a positive way, but without mandating or restricting choices. Example: A sign that says Take the stairs instead of the elevator- it's good for your health is an example of a nudge. |
Framing |
The way in which a problem or decision is presented, which may affect how people perceive and respond to it. Example: In a study, people were more likely to choose a treatment with a 90% success rate when it was presented as a positive frame, rather than a negative frame (with a 10% chance of failure). |
Anchoring |
The tendency to rely too heavily on the first information encountered when making decisions, even if this information is not relevant or reliable. Example: If a car salesman tells you the original sticker price of a car, you may perceive the actual price as a better deal, even if it is still high. |
Prospect theory |
A model of decision-making that explains how people evaluate potential gains and losses differently, and how they take into account risk and uncertainty. Example: According to prospect theory, people are more willing to take risks to avoid losses, than to pursue gains. |
Endowment effect |
The tendency of people to value an object or good more highly if they possess it, even if they have no intention of using it or selling it. Example: A study found that participants who were given mugs as a gift were more likely to ask for a higher price if they were selling it, compared to those who did not receive a mug. |
Confirmation bias |
The tendency of people to seek out, remember, and interpret information in a way that confirms their pre-existing beliefs, and to ignore or reject information that contradicts them. Example: Political pundits often interpret news events in a way that aligns with their party's views, rather than being objective. |
Herd behavior |
The tendency of people to follow the actions, beliefs, or preferences of a larger group, even if these actions are irrational or risky. Example: In financial markets, herd behavior can lead to asset bubbles or stock market crashes. |
Irrationality |
The departure from rational decision-making, often through emotional or psychological factors. Example: Even though smoking cigarettes carries known health risks, some people continue to smoke because of addiction or ignorance of the risks. |
Status quo bias |
The preference for maintaining the current situation, and the reluctance to change, even if the change may be better. Example: In a study, people were less likely to choose a new health insurance plan, even when it could save them money, compared to those who had no plan. |
Choice overload |
The negative consequences of having too many options to choose from, leading to confusion, regret, or decision paralysis. Example: Some consumers may avoid shopping at large grocery stores because they are overwhelmed by the variety of products. |
Availability |
The tendency of people to judge the probability of an event based on how easily they can recall similar events or examples. Example: A person may overestimate the likelihood of dying in a plane crash, because the news often focuses on such incidents. |
Social norms |
Informal rules or expectations of behavior that exist within a group or society, and that may guide choices or actions. Example: People may recycle more if they see their neighbors doing so, because it is seen as a norm in their community. |
Heuristics |
Mental shortcuts or rules of thumb that people use to simplify complex decisions or problems, often without conscious awareness. Example: The availability heuristic is a common one, where people judge the likelihood of an event based on how easily they can recall examples of it. |
Incentives |
Rewards or punishments, whether external or internal, that motivate or discourage specific behaviors. Example: A company may offer financial incentives to its employees to encourage them to meet their sales targets. |
Mental accounting |
The tendency of people to treat money or resources as belonging to different categories or accounts, instead of as a single pool. Example: A person may save money in a different account for vacations or emergencies than for college tuition, even if those accounts have similar interest rates. |
Sunk cost fallacy |
The mistaken belief that one should continue to invest time, resources, or energy into a project or decision, based on the amount of previous investment, even if the return on investment is unlikely. Example: A person may continue to watch a movie that they dislike, simply because they've already paid for the ticket. |
Loss aversion |
The preference or tendency to avoid losses, even at the cost of forgoing potential gains. Example: In a study, participants were more likely to choose a sure gain of $50, than a 50% chance of winning $100, even though the expected value of both options was the same ($50). |