Incentive Design Entry #0385 Classified Declassified

The reason deadlines set by others are missed differently

A deadline the person chose binds more tightly than one imposed from outside. The difference is not in the calendar but in who owns the commitment.

Filed by The Archivist 2 min read

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Plate 190 — two identical dates, one of them heavier.

Intuition test — answer before you read on

Why are self-set deadlines missed less often than imposed ones with the same date?

Two projects with identical scope receive identical deadlines. One deadline was chosen by the team, the other imposed by a manager. The self-set deadline is missed less often, and when it is missed, the overshoot is smaller.

What everyone sees

Both deadlines carry consequences: the manager’s version may carry a formal penalty, which should make it harder to miss. The observation that the self-set version binds more tightly contradicts the expectation that external enforcement is the stronger instrument.

What is actually happening

Ariely and Wertenbroch showed that self-imposed deadlines improved performance relative to externally imposed ones, despite being suboptimal in spacing. Locke and Latham’s goal-setting theory holds that commitment is a moderator of goal effectiveness, and commitment is higher when the goal is self-selected. Deci and Ryan’s self-determination theory identifies autonomy as a basic psychological need: tasks framed as chosen generate more sustained effort than tasks framed as assigned, even when the task itself is identical.

Why it stays hidden

The ownership effect hides because deadlines look like dates, and dates are the same regardless of who set them. The calendar does not distinguish between a self-set Tuesday and an imposed Tuesday. The difference is in the psychological contract: missing a self-set deadline is a failure of one’s own word, while missing an imposed deadline is a failure to comply with someone else’s, and the two carry different internal costs.

The date is the same. The ownership is different. A commitment made by the person who must keep it binds in a way that an instruction does not.

The date is the same. The ownership is different. A commitment made by the person who must keep it binds in a way that an instruction does not.

The hidden part — entry #0385

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The date is the same. The ownership is different. A commitment made by the person who must keep it binds in a way that an instruction does not.

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Sources & further reading 3
  1. Ariely & Wertenbroch, "Procrastination, Deadlines, and Performance", Psychological Science, 2002
  2. Locke & Latham, "Building a Practically Useful Theory of Goal Setting and Task Motivation", American Psychologist, 2002
  3. Deci & Ryan, "Self-Determination Theory and the Facilitation of Intrinsic Motivation", American Psychologist, 2000
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