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(Behavioural Science) #50 Message Format and timing

  Principle #50 · Framing category Message format & timing The same information delivered in a different format, through a different channel, or at a different moment produces dramatically different behavioral responses. Content is only half the equation of effective communication — the structural and temporal context in which it is received determines whether it is processed, remembered, trusted, and acted upon. Optimizing message format and timing is one of the highest-leverage, lowest-cost behavioral interventions available, because it changes outcomes without changing the underlying information, the incentive, or the ask. 4.2pp increase in vaccination rates from adding a specific date/time to a flu shot reminder — same message, added temporal specificity Channel matters as much as content: a text message reminder for a medical appointment reduces no-shows more than a letter with identical information Teachable moments — periods of openness triggered by life events, decision...
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(Behavioural Science) #49 Illusion of Control

  Principle #49 · Cognitive bias category Illusion of control People systematically overestimate their ability to control or influence outcomes that are determined entirely or substantially by chance. Skill-like features — choice, familiarity, competition, active involvement — trigger the same cognitive patterns that govern skill-based performance, causing people to believe their actions affect outcomes when they objectively do not. The illusion is not simply overconfidence; it is the misapplication of competence-based mental models to chance-based situations. Langer Ellen Langer coined and documented the illusion of control in 1975, showing that skill-like features in chance tasks inflate perceived control dramatically Lottery tickets chosen by the buyer sell for ~4× more than randomly assigned tickets — self-selection creates illusion of control over random draws Finance active traders who believe they influence returns trade more, incur higher costs, and systematically underperf...
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