WORKLOAD EFFECT ON TASK PERFORMANCE ON INCLINED SURFACE

描述：（改编自研究者摘要）工人 （建筑工人、屋顶工人等）在高架和/或倾斜的 地面因福尔斯坠落而导致的死亡/受伤发生率相对较高 其他与工作相关的原因。 这项为期五年的研究提供了 实验设计，有可能调查 在高架和/或倾斜路面上工作的工作经验之间的相互作用 表面、年龄、性别和其他跌倒风险因素，如体力工作量， 站立表面倾斜度和环境照明。 一系列 实验将在240名工业工人（如 屋顶工、玻璃工、油漆工、铁工等）， 在倾斜和/或升高的表面上工作，以测试以下内容 假设：a）. 工作量引起的变化将有所不同， 视觉空间感知能力之间的“经验丰富的”工人和 “无经验”的工人。 B）. 有经验的工人将有较小的 在暴露于一个垂直/水平线索后检测垂直/水平线索的错误数量 工作量或站在斜面上时，与 没有经验的工人。 （c）。 工作量大，环境照明差 将产生有害影响（增加姿势摇摆变量和/或 增加对失去平衡的敏感性，如适当 稍后此应用程序中的变量）对经验不足的工人的能力 在进行模拟工业操作时保持直立姿势平衡 与有经验的工人相比。 d）。 最高级别（100 瓦特）的工作量和恶劣的环境照明， 集体将增加所需的肌肉收缩水平， 在执行模拟工业任务时保持直立平衡， 倾斜表面 有经验的工人会表现出较低的 与没有经验的人相比，姿势性肌肉收缩。 e.的 战略性放置的视觉提示将显着提高工人的能力 在承受最高负荷（100 瓦）和不良的环境照明，并降低肌肉水平 姿势肌肉的收缩。 由于没有有关的定量数据， 有经验工人的姿势平衡特征存在 拟议的研究旨在收集这些数据。 此类数据的提供情况 将允许1）为新工人制定计划培训计划， 在倾斜/升高的表面上执行体力要求高的任务2）， 确定视觉提示的需要，以尽量减少过多的姿势肌肉 疲劳，并提供一个安全的直立平衡维护，而工作在一个 倾斜和/或升高的表面。

DESCRIPTION: (Adapted from the Investigator's Abstract) Workers (construction workers, roofers, etc.) who work on elevated and/or inclined surfaces have relatively higher incidences of deaths/injuries due to falls than other work related causes. This five year study provides an experimental design which has the potential for investigating the interaction between work experience of working on elevated and/or inclined surface, age, sex, and other fall risk factors such as physical workload, standing surface inclination and environmental lighting. A series of experiments will be carried out with 240 industrial workers (such as roofers, glazers, painters, ironworkers, etc) with and without experience in working on inclined and/or elevated surfaces to test the following hypotheses: a). There will be a difference in workload induced changes in visual spatial perception abilities between the "experienced" workers and the "inexperienced" workers. b). The experienced workers will have smaller numbers of errors in detecting vertical/horizontal cues after exposure to a workload or while standing on an inclined surface, compared to those from inexperienced workers. c). The workload and poor environmental lighting will have detrimental effects (increase in postural sway variables and/or increase in susceptibility to loss of balance as described by appropriate variables in this application later) on inexperienced workers ability to maintain upright postural balance while performing simulated industrial tasks, as compared to experienced workers. d). The highest level of (100 watts) workload and poor environmental lighting either individually and/or collectively will increase the muscular contraction levels needed to maintain upright balance while performing simulated industrial tasks on inclined surfaces. The experienced workers will show lower levels of postural muscular contractions compared to those with no experience. e. The strategically placed visual cues will significantly improve workers ability to maintain upright balance after exposure to the highest workload (100 watts) and poor environmental lighting and lower the levels of muscular contractions of the postural muscles. As no quantitative data regarding the characteristics of postural balance of experienced workers exists the proposed study is designed to collect such data. Availability of such data will allow to 1) develop planned training programs for new workers who have to perform physically demanding tasks on inclined/elevated surfaces 2) to determine the need of visual cues to minimize excessive postural muscle fatigue and provide a safe upright balance maintenance while working on an inclined and/or elevated surfaces.