A simple threshold rule is sufficient to explain sophisticated collective decision-making.
A simple threshold rule is sufficient to explain sophisticated collective decision-making.
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DOI：
10.1371/journal.pone.0019981
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发表时间：
2011
期刊：
影响因子：
3.7
通讯作者：
Marshall JA
中科院分区：
文献类型：
--
作者：
Robinson EJ;Franks NR;Ellis S;Okuda S;Marshall JA
做出决策的动物可以使用缓慢但准确的策略，例如进行多重比较，或者选择更简单、更快的策略来找到“足够好”的选项。社会性动物对许多群体行为做出集体决定，包括觅食和迁徙。集体选择的关键在于个人行为。我们提出了一个集体决策过程的案例研究（寻屋蚂蚁，Temnothorax albipennis），其中先前提出的决策策略涉及质量依赖的犹豫和侦察员对巢穴的直接比较。另一种可能的决策策略是侦察蚂蚁使用非常简单的质量相关阈值规则来决定是招募巢友到新地点还是寻找替代品。我们使用分析和模拟模型来证明，这个简单的规则足以解释来自蚂蚁集体决策的三项研究的经验模式，并且当可用巢穴的质量差异很大时，可以简单地解释个体的明显比较和明显的犹豫（招募潜伏期）效应。这凸显了需要仔细设计实验来检测个体比较。我们提供的经验数据强烈表明，尽管不排除个体顺序比较，但个体蚂蚁不使用最佳比较。然而，通过使用简单的阈值规则，决策小组能够有效地比较选项，而不依赖于个人对替代方案的任何形式的直接比较。这种简约的机制可以促进群体决策的集体理性。
Decision-making animals can use slow-but-accurate strategies, such as making multiple comparisons, or opt for simpler, faster strategies to find a ‘good enough’ option. Social animals make collective decisions about many group behaviours including foraging and migration. The key to the collective choice lies with individual behaviour. We present a case study of a collective decision-making process (house-hunting ants, Temnothorax albipennis), in which a previously proposed decision strategy involved both quality-dependent hesitancy and direct comparisons of nests by scouts. An alternative possible decision strategy is that scouting ants use a very simple quality-dependent threshold rule to decide whether to recruit nest-mates to a new site or search for alternatives. We use analytical and simulation modelling to demonstrate that this simple rule is sufficient to explain empirical patterns from three studies of collective decision-making in ants, and can account parsimoniously for apparent comparison by individuals and apparent hesitancy (recruitment latency) effects, when available nests differ strongly in quality. This highlights the need to carefully design experiments to detect individual comparison. We present empirical data strongly suggesting that best-of-n comparison is not used by individual ants, although individual sequential comparisons are not ruled out. However, by using a simple threshold rule, decision-making groups are able to effectively compare options, without relying on any form of direct comparison of alternatives by individuals. This parsimonious mechanism could promote collective rationality in group decision-making.
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影响因子：
1
作者：
BECKERS, R;DENEUBOURG, JL;GOSS, S
通讯作者：
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DOI：
10.1073/pnas.0507877103
发表时间：
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影响因子：
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发表时间：
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影响因子：
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作者：
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影响因子：
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作者：
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