Positivity Effect

You're seeing it when a leadership team's post-mortem focuses almost entirely on what went right, with failures treated as brief footnotes. The ratio of positive to negative recall is suspiciously skewed toward the comfortable narrative.

You're seeing it when a veteran investor recalls their winning picks with vivid detail but can barely reconstruct the thesis behind their losses. The portfolio history has been emotionally edited.

Build a structured record of failures, close calls, and negative customer feedback. Review it quarterly alongside your wins. The Positivity Effect will naturally curate your memory toward success stories — your systems need to correct for what your brain quietly deletes.

Buffett has long warned about the danger of selective memory in investing. His annual shareholder letters deliberately catalogue his mistakes alongside successes — detailing bad acquisitions, missed opportunities, and errors of judgment with uncomfortable specificity. This practice directly counteracts the Positivity Effect. While most CEOs curate their narratives toward the positive, Buffett forces public accountability for his failures, ensuring that neither he nor his shareholders develop a selectively rosy view of Berkshire's track record. For founders, the lesson is structural: don't rely on your memory to give you an honest account of your decisions. Build artifacts — written records, post-mortems, loss logs — that preserve the negative data your brain will naturally discard.