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Set-fit effects in choice.

Ellen R K Evers1, Yoel Inbar1, Marcel Zeelenberg1

  • 1Department of Social Psychology & TIBER, Tilburg University.

Journal of Experimental Psychology. General
|June 19, 2013
PubMed
Summary
This summary is machine-generated.

People prefer items that fit well within a set, prioritizing consistency or diversity in attributes. This set-fit preference can override individual item preferences, leading to suboptimal choices.

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Area of Science:

  • Consumer Psychology
  • Decision Science
  • Behavioral Economics

Background:

  • Understanding consumer choice involves analyzing individual preferences and external influences.
  • The concept of 'set-fit' suggests that the coherence of a collection influences selection beyond individual item appeal.

Purpose of the Study:

  • To investigate the impact of an item's "fit" within a set on consumer choice.
  • To determine if a coherent set influences preference and decision-making.

Main Methods:

  • Conducted four experiments examining how item coherence within a set affects choice.
  • Assessed participants' notions of set coherence based on item attributes (sameness or difference).
  • Analyzed how set-fit influences individual item preferences and overall set selection.

Main Results:

  • Participants demonstrated a clear preference for sets where items were either uniformly similar or uniformly different on salient attributes.
  • Choice decisions were influenced by this "set-fit" consideration, in addition to individual item preferences.
  • Set-fit considerations led to predictable shifts in preferences, sometimes causing participants to select less optimal options.

Conclusions:

  • A set's perceived coherence, or "set-fit," is a significant factor in consumer choice.
  • This preference for set-fit can lead to decisions that are normatively inferior.
  • Future research should explore the boundaries and applications of set-fit in various choice contexts.