

162 | Leidy Klotz on Our Resistance to Subtractive Change
Aug 30, 2021
Leidy Klotz, a Professor of Engineering Systems and Environment at the University of Virginia, explores our surprising resistance to subtractive change. He discusses how most people instinctively add elements to solve problems rather than remove them, highlighting its implications for design and sustainability. Klotz dives into the psychological barriers that inhibit us from considering less as more, revealing how cultural values influence our decision-making. Ultimately, he encourages embracing subtraction to foster personal growth and innovative solutions.
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Ezra's Bridge Solution
- Leidy Klotz's son, Ezra, solved a Lego bridge problem by removing a block.
- Klotz, an engineer, was about to add a block, highlighting the human bias toward additive solutions.
Additive Bias
- Humans tend to add rather than subtract when problem-solving.
- This bias applies to physical objects, ideas, and situations.
Grid Experiment
- In Klotz's grid experiment, participants favored adding green blocks over removing existing marks to achieve symmetry.
- This confirmed the additive bias even in abstract tasks with no inherent value assigned to elements.