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Source: Dev.to

Prospect Theory Overview

Prospect Theory, developed by Daniel Kahneman and Amos Tversky, provides a practical framework for understanding how people make choices. It highlights several systematic biases that shape decision‑making.

Loss Aversion

• Losses feel roughly twice as painful as equivalent gains feel good.
• Example: Losing $100 hurts more than finding $100 feels good.

Reference Dependence

• Outcomes are evaluated relative to a reference point, not in absolute terms.
• Example: A salary of $80,000 feels great if you expected $70,000, but terrible if you expected $90,000.

Diminishing Sensitivity

• The perceived difference between $100 and $200 feels larger than the difference between $1,100 and $1,200, even though both gaps are $100.

Probability Distortion

• People overweight small probabilities (e.g., lottery tickets, unlikely disasters) and underweight moderate to high probabilities.

Applications

Negotiation

• Frame offers as gains from a lower reference point rather than concessions from a higher one.
• An offer of $85 K feels better when anchored against $80 K than when presented as a reduction from $90 K.

Change Management

• Resistance to change is often driven by loss aversion.
• Emphasize what will be gained rather than what might be lost, or frame the status quo itself as a loss.

Pricing

• Bundle losses: One payment for multiple items feels like a single loss.
• Unbundle gains: Multiple separate benefits feel like multiple gains.

Risk Communication

• Presenting a surgery with a 90 % survival rate gains more acceptance than stating a 10 % mortality rate—the same information framed differently.

Practical Tips

• Reframe gains as losses and vice versa. Does the decision still look good from both frames?
• Evaluate outcomes in absolute terms, not relative to arbitrary reference points.
• Be aware of framing: Options may be presented to manipulate your perception.
• When facing a loss, slow down. Loss aversion can push you toward excessive risk‑seeking (gambling to recover) or excessive risk‑aversion (freezing).

Further Resources

• Experience prospect theory effects firsthand at KeepRule Scenarios.
• Study how experts manage framing effects at Decision Masters.
• Learn behavioral decision science at Core Principles.
• For common bias questions, check the FAQ.

Understanding how your brain distorts reality is the first step to seeing it clearly.