Age related changes in functional field of view (FFOV): a comparison of young and older adults

This dataset contains 2 x text files of raw data; 2 x text files of data; 1 x excel spreadsheet (original) & 2 x CSV (preservation) files.The data was collected to test whether differences in parallel processing efficiency explain age-related changes in the FFOV (functional field of view). The current work measured the workload capacity coefficient, C(t)OR, for targets appearing at various retinal eccentricities in young and older adults. Derived from analysis of response time distributions, C(t)OR gauges the efficiency with which observers process multiple items simultaneously relative to the rate at which they process items individually. Subjects performed a speeded target identification task, with targets appearing at varying retinal eccentricities and in the presence or absence of visual clutter.Data description: Eight young adult participants(4 female, 4 male; mean age = 21.4 years, SD = 2.7; mean years of education = 14.8, SD = 2.6; mean corrected far acuity = 16/20, SD = 2.4; mean corrected near acuity = 20/20, SD = 0) and eight older adult participants (4 female, 4 male; mean age = 74.0 years, SD = 5.0; mean years of education = 13.6, SD = 1.9; mean corrected far acuity = 23.8/20, SD = 4.2; mean corrected near acuity = 23.8/20, SD = 7.0) performed a visual target identification task. Targets were coloured letters X or O that appeared at varying eccentricities (2.0°, 6.0°, or 10.0°) above or below a central fixation mark. Targets appeared either singly or redundantly (one each equal distances above and below fixation), and appeared either against an empty background or surrounded by grey clutter. Each participant contributed 5184 trials.Dependent variables included response times (RTs) and error rates, along with measures of workload capacity, the efficiency of multiple-target processing. In addition to raw data (ASP_RawYoungData.txt,ASP_RawOlderData.txt), the files attached include,• mean RT and error rate for each participant, calculated as a function of trial type (single-target vs. redundant-target), target eccentricity (near vs. middle vs. far), and display clutter (present vs. absent) (ASP_RT_ACC.txt);• mean RT and error rate for each young adult participant, transformed to account for age-group differences in mean raw scores, calculated as a function of of trial type, target eccentricity, and display clutter (ASP_RT_ACC.txt);• the raw workload capacity score, COR, for each participant, calculated as a function of time, target eccentricity, and display clutter(ASP_CtTimelines.xlsx);• summary workload capacity scores, Cz, for each participant, calculated as a function of time, target eccentricity, and display clutter (ASP_Cz.txt).

本数据集包含原始数据文本文件2份、数据文本文件2份、原始Excel表格1份以及CSV格式保存文件2份。数据收集旨在验证并行处理效率的差异是否可以解释功能性视野（FFOV）与年龄相关的变化。本研究测量了年轻和老年人在不同视网膜视差下的目标工作负载容量系数C(t)OR。通过响应时间分布的分析，C(t)OR衡量了观察者在处理多个项目时的效率相对于单独处理项目速率的效率。受试者执行了加速目标识别任务，目标出现在不同的视网膜视差位置，并在存在或不存在视觉杂乱的情况下呈现。数据描述：八名年轻成人受试者（4名女性，4名男性；平均年龄为21.4岁，标准差为2.7；平均受教育年限为14.8年，标准差为2.6；平均矫正远视力为16/20，标准差为2.4；平均矫正近视力为20/20，标准差为0）和八名老年成人受试者（4名女性，4名男性；平均年龄为74.0岁，标准差为5.0；平均受教育年限为13.6年，标准差为1.9；平均矫正远视力为23.8/20，标准差为4.2；平均矫正近视力为23.8/20，标准差为7.0）执行了视觉目标识别任务。目标为不同视差（2.0°、6.0°或10.0°）上方的彩色字母X或O，相对于中央注视点呈现，可能单独出现或重复出现（等距分别出现在注视点上方和下方），并可能出现在空背景或灰色杂乱中。每位受试者贡献了5184次试验。依赖变量包括反应时间（RTs）和错误率，以及工作负载容量和多重目标处理效率的衡量。除了原始数据（ASP_RawYoungData.txt，ASP_RawOlderData.txt）外，附加文件包括：•每位受试者按试验类型（单目标与重复目标）、目标视差（近、中、远）和显示杂乱（存在与不存在）计算的平均反应时间和错误率（ASP_RT_ACC.txt）；•将每位年轻成人受试者的平均反应时间和错误率转换以考虑年龄组平均原始分数的差异，按试验类型、目标视差和显示杂乱计算（ASP_RT_ACC.txt）；•每位受试者的原始工作负载容量得分COR，按时间、目标视差和显示杂乱计算（ASP_CtTimelines.xlsx）；•每位受试者的总结工作负载容量得分Cz，按时间、目标视差和显示杂乱计算（ASP_Cz.txt）。