The Center of Pressure Data from "The Rim and Ancient Mariner: The Nautical Horizon Affects Postural Sway in Older Adults"

This csv file contains the raw center of pressure data measured in centimeter (cm). They were collected on an AMTI force plate across two days from 18 participants. Participant 1-11 participated on day 1. Participant 12-18 participated on day 2. Participant 17 discontinued mid study and the data was excluded from analysis. Each column is a time series evenly distributed across the duration of a trial (60 seconds). Each participant took part in 6 trials: 3 trials for the far condition and 3 trials for the near condition. Each trial yielded two columns of data for a participant. One column of data recorded the movement in the mediolateral (ML) axis, and the other column recorded the movement in the anterior-posterior axis (AP). The AP and ML axes act as coordinates for the x-y location of the center of pressure on the force plate. The columns in the csv file are ordered as thus: The first three columns are about P1 (Participant 1) for the ML axis in the far condition. The next three columns are about P2 for the ML axis in the far condition. The same pattern goes on until we reached Participant 18. Then the sequence repeats for the AP axis in the far condition, then for the ML axis in the near condition, and finally for the AP axis in the near condition.本逗号分隔值（Comma-Separated Values，CSV）文件存储了以厘米（centimeter，cm）为量测单位的原始压力中心（center of pressure, CoP）数据。该数据由AMTI测力台（force plate）采集，采集周期为两天，共招募18名受试者参与。其中第1至11名受试者于首日参与实验，第12至18名受试者于次日参与实验。第17名受试者在实验中途退出，其相关数据已被排除在分析之外。每一列对应一段时长60秒的试次（trial）内均匀采样的时间序列数据。每名受试者共完成6组试次：其中3组为远距离条件试次，剩余3组为近距离条件试次。每组试次会为每名受试者生成两列数据：一列记录中外侧（mediolateral, ML）轴方向的运动数据，另一列记录前后（anterior-posterior, AP）轴方向的运动数据。AP轴与ML轴可作为测力台上压力中心的x-y平面坐标参考。本CSV文件的列排布规则如下：前3列对应受试者1（P1）的远距离条件下ML轴数据；随后3列对应受试者2（P2）的远距离条件下ML轴数据，以此类推直至受试者18。完成所有受试者的远距离条件ML轴数据列后，序列将重复排布：首先为所有受试者的远距离条件AP轴数据列，其次为所有受试者的近距离条件ML轴数据列，最后为所有受试者的近距离条件AP轴数据列。