快速=真诚：社会困境中的互象决策时长效应

doi:10.3724/SP.J.1041.2026.1428

摘要/Abstract

摘要： 针对互动对象决策时长对人际感知及社会困境中合作行为影响的争议, 通过剥离行为结果信息, 考察纯决策时长信号的作用机制：预实验确定快慢决策的适当时限; 实验1采用“直接感知+间接提示”范式操纵决策时长, 考察其是否及如何影响感知真诚; 实验2a采用相同范式操纵决策时长, 考察其是否通过感知真诚和合作预期影响社会困境中的合作行为, 实验2b和2c则分别仅采用“直接感知”或“间接提示”方式, 考察此两种弱化决策时长操纵条件下实验2a结果的稳健性, 并排除感知能力的替代解释; 实验3探讨个体的社会价值取向是否及如何调节决策时长效应。结果发现：快决策使人感知更真诚而不影响感知能力, 且通过感知真诚的独立中介及其与合作预期的链式中介双重路径诱发更多合作行为。该效应适用于亲社会个体, 而不适用于亲自我个体。这些结果不仅证实了互动对象决策时长的独立社会信号意义, 而且揭示了其对社会困境中合作行为的“双路径-两阶段”作用机制和边界条件, 为消解决策时长人际效应的理论争议提供了新证据, 也对现实社会困境中通过缩短响应时间传递真诚以优化合作策略具有实践启示意义。

关键词: 社会困境, 决策时长, 感知真诚, 合作预期, 合作行为

Abstract: Prior research has shown that the time interaction partners take to make decisions can shape interpersonal perceptions and influence cooperative behavior in social dilemmas. Yet, it remains uncertain whether faster or slower decisions are more likely to foster positive impressions and promote cooperation. This study examined how decision time, as a single cue provided by interaction partners, influenced cooperative behavior in social dilemmas while controlling for other interpersonal cues. From the perspective of interpersonal perception, this study aimed to clarify the effect of decision time on cooperation and to uncover the psychological mechanisms and boundary conditions underlying this effect, thereby offering a more nuanced understanding of this important social cue.
This study employed a public goods game paradigm to measure cooperative behavior and included one pilot experiment and five formal experiments. The pilot experiment was conducted to determine appropriate time thresholds for fast and slow decision-making. Experiment 1 manipulated the decision time of an interaction partner by combining direct perception with an indirect cue, in order to assess its impact on perceived sincerity. Experiment 2a manipulated decision time in the same way to examine whether it influenced cooperative behavior through the mediating roles of perceived sincerity and cooperation expectations. Experiments 2b and 2c used either direct perception or an indirect cue alone, respectively, to examine the robustness of the findings from Experiment 2a under weaker manipulation conditions and to rule out perceived competence as an alternative explanation. Experiment 3 investigated whether and how individuals' social value orientation moderated the effect of decision time on perceived sincerity, cooperation expectations, and cooperative behavior.
The main results can be summarized as follows: (1) Individuals perceived partners who made fast decisions as more sincere than those who made slow decisions. (2) Fast decision-making promoted cooperative behavior through enhanced perceived sincerity, as well as through the chain-mediating effects of perceived sincerity and cooperation expectations. (3) The influence of decision time on cooperative behavior was moderated by social value orientation. Pro-social individuals perceived fast-deciding partners as more sincere than slow-deciding ones, which led to higher cooperation expectations and thus more cooperative behavior. In contrast, decision time did not affect pro-self individuals' perceptions of their partners' sincerity, and therefore did not influence their cooperative behavior.
These findings not only demonstrate the independent social-signaling value of partner decision time, but also reveal its dual-pathway mechanism and boundary conditions in shaping cooperative behavior in social dilemmas. The results provide new evidence that helps resolve theoretical debates concerning the interpersonal effects of decision time, and offer practical implications for optimizing cooperative strategies in real-world social dilemmas by highlighting the role of faster responses in conveying sincerity.

Key words: social dilemmas, decision time, perceived sincerity, cooperative expectations, cooperative behavior

中图分类号:

B849: C91

刘永芳, 孙月, 练金晶. (2026). 快速=真诚：社会困境中的互象决策时长效应. 心理学报, 58(7), 1428-1443.

LIU Yongfang, SUN Yue, LIAN Jinjing. (2026). Fast = Sincere: The effect of interactive partner decision time in social dilemmas. Acta Psychologica Sinica, 58(7), 1428-1443.

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