Variables-within-period mean values and standard errors.

This Excel spreadsheet contains the data and calculations for the mean values and standard errors of the variables used to produce Figs 3–5 in the Main Text. The cultural traits in this sheet are grouped according to their appropriate time period. For each trait, the abbreviation (column B), the age of first consolidate appearance (column C), and the appropriate time period (column D) are provided. See Main Text’s Methods for the definition of the variables; Tables 1 and S1 provide further details on the considered cultural traits.
(XLSX)

本Excel电子表格包含了正文中用于生成图3至图5的变量的均值与标准误差相关数据及计算结果。本表中的文化特质（cultural traits）按照其所属的对应时间段进行分组。针对每一项文化特质，本表提供了其缩写（位于B列）、首次定型出现的年代（位于C列）以及所属对应时间段（位于D列）。变量的具体定义请参见正文中的方法部分；表1与补充表S1对本次研究所涉及的文化特质提供了更为详细的说明。
（XLSX）