Decision Fatigue Exploitation deliberately prolongs and complicates a decision until the target’s capacity for careful judgment is worn down and the easy answer — usually yes — wins by attrition. The marathon timeshare presentation and the long finance-office close are the canonical settings: hours of options, add-ons, and paperwork that outlast the target’s patience, so that agreement arrives as relief from the ordeal rather than as a reasoned choice.
The commonly cited mechanism is “ego depletion” — the idea, associated with Roy Baumeister’s research, that self-control and effortful deliberation draw on a limited resource that depletes with use. That specific account is genuinely contested: large replication efforts have failed to reproduce the classic depletion effect, so the strict resource model is rated here at low confidence and flagged as disputed. What is far less controversial is the observable outcome: people making decisions while tired, hungry, or cognitively taxed lean harder on heuristics and default choices, and drawn-out, high-complexity settings reliably produce more compliant decisions than short, clear ones — whatever the underlying cause.
Because the tactic is a slow burn rather than a sudden shove, it is hard to spot from inside the moment; the pressure feels like the natural length of a complicated deal. The tell is the relationship between the decision and the exhaustion: when the length and complexity far exceed what the choice actually requires, and the yes tracks how drained you are rather than how convinced you are, the fatigue is the product being sold to you.