Leiva David, Solanas Antonio, Salafranca Lluís
Facultad de Psicología, Universidad de Barcelona, Barcelona, Spain.
Psicothema. 2008 Nov;20(4):951-7.
The present work focuses on the skew-symmetry index as a measure of social reciprocity. This index is based on the correspondence between the amount of behaviour that individuals address toward their partners and what they receive in return. Although the skew-symmetry index enables researchers to describe social groups, statistical inferential tests are required. This study proposes an overall statistical technique for testing symmetry in experimental conditions, calculating the skew-symmetry statistic (Phi) at group level. Sampling distributions for the skew-symmetry statistic were estimated by means of a Monte Carlo simulation to allow researchers to make statistical decisions. Furthermore, this study will allow researchers to choose the optimal experimental conditions for carrying out their research, as the power of the statistical test was estimated. This statistical test could be used in experimental social psychology studies in which researchers may control the group size and the number of interactions within dyads.
本研究聚焦于偏对称指数，将其作为社会互惠性的一种度量。该指数基于个体对其伙伴所表现出的行为数量与他们所得到的回报之间的对应关系。尽管偏对称指数能使研究人员描述社会群体，但仍需要进行统计推断测试。本研究提出了一种整体统计技术，用于在实验条件下检验对称性，在群体层面计算偏对称统计量（Phi）。通过蒙特卡罗模拟估计偏对称统计量的抽样分布，以便研究人员做出统计决策。此外，由于估计了统计检验的功效，本研究将使研究人员能够选择开展其研究的最佳实验条件。这种统计检验可用于实验社会心理学研究，在这类研究中，研究人员可以控制群体规模和二元组内的互动次数。
