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術語

選擇過載 - 選擇邏輯學

過多的選項會降低滿意度並增加決策疲勞。

別名：選擇過多、選擇悖論

Definition

選擇過載：過多的選項會降低滿意度並增加決策疲勞。

1. Mechanism (why it happens)

選擇過載會增加認知成本：隨著選項增加，搜尋和比較的需求上升，從而增加決策疲勞並降低滿意度。 效果取決於情境、專業知識和決策支持。[^2]

2. Classic experiments / evidence

2.1 Assortment size and purchase behavior (Iyengar & Lepper, 2000)

  • Design: Field experiments (e.g., jam tasting) comparing small vs large assortments.[^1]
  • Manipulation: Number of options (limited vs extensive).[^1]
  • Key finding: Large assortments can attract interest but reduce purchase and satisfaction under some conditions.[^1]
  • Notes/limitations: Canonical study; effects are context-dependent.

2.2 Meta-analysis (Scheibehenne, Greifeneder & Todd, 2010)

  • Design: Meta-analysis across studies on choice overload.[^2]
  • Manipulation: Varies across included studies.[^2]
  • Key finding: Choice overload effects are not universal; moderators matter.[^2]
  • Notes/limitations: Supports a conditional, decision-class view consistent with T2.

3. Consumer decision patterns

  • 對於低風險物品的無止盡比較。
  • 「研究螺旋」消耗認知預算。
  • 由於反事實思考而增加後悔（「可能會有更好的選擇」）。

4. How marketing leverages it

平台可能會故意擴大產品種類以增加參與度，同時使用排名和社會暗示來引導選擇。 這可能會增加決策疲勞和對啟發法的依賴。[^2]

5. Mitigation (Selection Logic)

  1. 積極地列出候選清單 (D1)，並在達到閾值時停止（滿意即可）。
  2. 根據風險分配精力 (T2)。
  3. 使用結構化的維度 (M2) 和一致的評分標準 (M4)。

References

  1. Iyengar, S. S., & Lepper, M. R. (2000). When choice is demotivating: Can one desire too much of a good thing? Journal of Personality and Social Psychology, 79(6), 995–006.[source]
  2. Scheibehenne, B., Greifeneder, R., & Todd, P. M. (2010). Can there ever be too many options? A meta-analytic review of choice overload. Journal of Consumer Research, 37(3), 409–25.[source]
  3. Kahneman, D. (2011). Thinking, Fast and Slow. Farrar, Straus and Giroux.[source]

Further Reading