Skip to main content

How long will it take? Power biases time predictions

Weick, Mario, Guinote, Ana (2010) How long will it take? Power biases time predictions. Journal of Experimental Social Psychology, 46 (4). pp. 595-604. ISSN 0022-1031. (doi:10.1016/j.jesp.2010.03.005) (KAR id:24273)

Language: English
Download (571kB) Preview
[thumbnail of Weick&Guinote_PowerAndTimePredictions_2010_JESP_AuthorsMS.pdf]
This file may not be suitable for users of assistive technology.
Request an accessible format
Official URL


People tend to underestimate the time it takes to accomplish tasks. This bias known as the planning fallacy

derives from the tendency to focus attention too narrowly on the envisaged goal and to ignore additional information that could make predictions more accurate and less biased. Drawing on recent research showing that power induces attentional focus, four studies tested the hypothesis that power strengthens the tendency to underestimate future task completion time. Across a range of task domains, and using multiple operationalizations of power, including actual control over outcomes (Study 1), priming (Studies 2 and 3), and individual differences (Study 4), power consistently led to more optimistic and less accurate time predictions. Support was found for the role of attentional focus as an underlying mechanism for those effects. Differences in optimism, self-efficacy, and mood did not contribute to the greater bias in powerful individuals’ forecasts. We discuss the implications of these findings for institutional decision processes and occupational health.

Item Type: Article
DOI/Identification number: 10.1016/j.jesp.2010.03.005
Uncontrolled keywords: Power; Control; Time; Planning fallacy; Forecasting
Subjects: B Philosophy. Psychology. Religion > BF Psychology
Divisions: Divisions > Division of Human and Social Sciences > School of Psychology
Depositing User: Mario Weick
Date Deposited: 16 Apr 2010 10:04 UTC
Last Modified: 16 Nov 2021 10:02 UTC
Resource URI: (The current URI for this page, for reference purposes)
  • Depositors only (login required):