# Understanding  Disjunctive Rule

As consumers, we are constantly making decisions, from what to eat for breakfast to which car to buy. But with so many options available, decision fatigue can quickly set in. That's where heuristics come in - mental shortcuts that help us make decisions quickly and efficiently. One such heuristic is the disjunctive rule.

## What is the Disjunctive Rule?

The disjunctive rule is a decision-making heuristic that allows individuals to make a choice based on the first option that meets a specified threshold or requirement. Essentially, it's a way to simplify the decision-making process by focusing on only one criterion at a time.

## How Does the Disjunctive Rule Work?

To use the disjunctive rule, an individual sets a minimum standard or requirement for each option being considered. The first option that meets or exceeds that standard is chosen as the final decision.

For example, when choosing a car, an individual might set a minimum requirement of having at least 30 mpg. As they consider different options, they eliminate any car that falls below this threshold. The first car they come across that has 30 mpg or higher becomes their final choice.

## When is the Disjunctive Rule Useful?

The disjunctive rule can be particularly useful in situations where there are a large number of options available and time is limited. It allows individuals to quickly narrow down their choices without having to consider every possible option in detail.

## How Does the Disjunctive Rule Relate to Choice Architecture?

Choice architecture refers to the way in which options are presented to individuals when making a decision. The disjunctive rule can be used as part of choice architecture by presenting options in a way that highlights their specific qualities or features.

For example, when choosing between different types of cereal, options could be presented with their nutritional information clearly displayed, allowing individuals to quickly eliminate any options that don't meet their minimum requirements.

## How Does the Disjunctive Rule Relate to the Default Effect?

The default effect refers to the tendency for individuals to choose the default option when making a decision. The disjunctive rule can be used as part of choice architecture to create a default option that meets a specific threshold or requirement.

For example, in a retirement plan, the default option could be set as a savings rate that meets or exceeds a minimum requirement for retirement savings.

## How Does Nudging Relate to the Disjunctive Rule?

Nudging refers to the use of subtle cues or reminders to encourage individuals towards a particular decision. The disjunctive rule can be used as part of nudging by presenting options in a way that encourages individuals towards a specific choice.

For example, in a restaurant, healthy options could be presented first on the menu, encouraging individuals to choose them as their first option that meets their minimum requirement for healthy eating.

## References

• Thaler, R. H., & Sunstein, C. R. (2008). Nudge: Improving decisions about health, wealth, and happiness.
• Tversky, A., & Kahneman, D. (1974). Judgment under uncertainty: Heuristics and biases.
• Ariely, D. (2008). Predictably irrational: The hidden forces that shape our decisions.
• Schwartz, B. (2004). The paradox of choice: Why more is less.
• Gigerenzer, G., & Goldstein, D. G. (2011). Reasoning the fast and frugal way: models of bounded rationality.