追踪作业中几种心理负荷评估指标敏感性的研究

本研究在模拟追踪作业情境下 ,对主任务绩效测定、主观评定和若干生理测量在心理负荷评估中的敏感性进行了实验。实验采用重复测量的被试者内设计 ,2 0名被试 (男女各半 )在六档负荷下分别从事五分钟追踪作业。所选用的指标有追踪作业平均误差距离、追踪警告次数、主观负荷评定、心率、心率变异和血压。结果发现 :1主任务绩效在评估追踪作业心理负荷中具有最高的敏感性 ,主观评定次之 ,心率变化率和心率变异变化率也随负荷变化 ,血压指标随负荷变化的趋势不明显 ;2除血压指标外 ,其余各指标之间均存在明显的相关 ,这提示它们在评估追踪作业心理负荷中具有较大的可靠性。     

团队学习、交互记忆系统与团队绩效：基于IMOI范式的纵向追踪研究

本研究采用纵向追踪设计,以55支实际运行的项目团队作为研究对象,分析检验了交互记忆系统对于团队学习与团队绩效之间关系的作用机制; 并基于理论界近期受到广泛关注的IMOI研究范式,通过两阶段的追踪探索团队学习与团队绩效间关系的动态机制。结果表明: 交互记忆系统对团队学习与团队绩效间关系呈现出显著的中介效应,能够为团队学习的绩效机制提供良好的理论解释力;另一方面,团队学习是一种动态演进的组织行为过程,采用IMOI范式来替代传统的I-P-O模型能够更好地剖析其动态属性。     

负荷水平和作业信息输入输出形式对视觉追踪操作心理负荷评估敏感性的影响

就负荷水平和信息输入形式,输出形式对视觉追踪作业心理负荷评估指标敏感性的影响进行了实验,获得以下主要结果：（１）主任务绩效具有较好的评估敏感性;（２）作业信息输入形式、输出形式对评估指标敏感性有显著影响。     

负荷水平和作业信息输入输出形式对视觉追踪操作心理负荷评估敏感性的影响

就负荷水平和信息输入形式、输出形式对视觉追踪作业心理负荷评估指标敏感性的影响进行了实验．获得以下主要结果：①主任务绩效具有较好的评估敏感性;②作业信息输入形式、输出形式对评估指标敏感性有显著影响．     

视觉追踪作业心理负荷的多变量评估研究

敏感性是心理负荷测量技术可靠性的基本要求。该研究利用主任务绩效、次任务绩效、主观“加权负荷”评定和心率变异变化率四项指标,在计算机模拟情境下对视觉追踪作业心理负荷进行多变量评估实验。结果发现,以上述四项指标为基础建立的“综合加权评估指数”是一项较有效的评估指标,其敏感性远高于任何单独的评定。     

异质化信任组合?工作团队信任不对称的积极影响效应

立足于全球化团队合作背景下信任不对称普遍存在的事实,以有效管理团队信任、促成团队合作共识并提升合作绩效为目标,系统考察被现有信任研究所忽略的信任差异——信任不对称在团队中的积极影响效应问题。作为一个研究构型,文章预期采用追踪研究方法建立并验证"信任不对称→中介过程→团队绩效(个体绩效)"的跨层次动态作用机制。预期研究成果不仅将有助于管理者深入了解信任不对称在团队中的存在形式,为管理者提供可行的管理策略参考;更能通过探究信任不对称如何正向作用于团队绩效的动态过程,弥补现有信任研究文献对信任不对称正面作用效应的关注不足,为今后的追踪研究提供一次有益的尝试。     

反馈类型和反馈时间对动作技能获得的影响

基于简单直线运动任务和复杂曲线追踪任务,在运动技能获得阶段考察不同反馈类型和反馈时间对操作绩效的影响。结果发现,在复杂曲线轨迹追踪任务中,接受运动轨迹反馈的被试组比接受偏差数值反馈组的成绩更好;即时反馈和延迟反馈组的操作绩效间没有显著差异。在简单直线运动任务中,提供落点偏差的图形反馈组成绩始终优于提供“近/远”信息的文本反馈组;在练习初期,即时反馈组成绩更好。说明,反馈信息的具体-抽象程度影响被试运动技能获得,提供具体直观的轨迹/图形反馈利于运动技能获得;反馈时间对运动技能的影响因任务难度而异。     

实习初期教师职业认同的发展轨迹及其与主动性人格的关系:一项追踪研究

采用主动性人格量表、工作绩效量表、人际关系量表、教师职业认同量表对385名实习教师从其实习第一周起连续追踪测量五周,利用多层线性模型探讨实习初期教师职业认同的发展轨迹,以及主动性人格对教师职业认同的影响及其机制。结果表明：(1)实习初期教师职业认同呈先高后低再升高的U型非线性发展趋势;(2)工作绩效和人际关系在主动性人格与教师职业认同之间起部分中介作用,且工作绩效的中介效应显著大于人际关系的中介效应。研究结果不仅揭示了实习初期教师职业认同的动态发展轨迹,同时还揭示了主动性人格影响教师职业认同的中介机制,对提升教师培养质量具有重要的参考价值。     

轻工企业组织行为与经济绩效的实证研究

为了探索中国轻工企业组织行为与经济绩效的因果关系和操作模式,我们参考英、荷、日三国有关企业组织行为的态度量表,设计了一套涵盖企业对市场竞争、文化理念和管理情景的“三模块”总量表,在轻工行业抽取八个样本企业,实施现场实验,采集有关企业组织行为的态度指数,然后与其经济绩效进行关联分析．结果表明,轻工企业组织行为的态度指数与其经济绩效总体趋势呈正相关,但个案分析提示两者间关系复杂,不仅有正相关,也有负相关现象;究其规律尚须扩大样本行纵贯式追踪研究．     

次要任务的输入方式对操作绩效和心理负荷的影响

用双任务法，探讨任务的输入方式对操作绩效和心理负荷的影响。即将计算机模拟的两种飞行操作作为两个任务（主任务为二维追踪，次任务为空间轨迹知觉），通过改变次任嵨竦男畔⑹淙敕绞剑ㄊ泳跏淙牖蛱跏淙耄员鹊ァ⑺挝裰校煌淙敕绞教跫灾魅挝窦◢效、次任务绩效及心理负荷的影响。结论是：与模拟飞行有关的单任务绩效受Ｓ－Ｃ－Ｒ相容性原理的支配；而双任务绩效受多资源理论的支配。     

Effects of input device and motion type on a cursor-positioning task

Many studies have investigated the performance of using nonkey-board input devices under static situations, but few have considered the effects of motion type on manipulating these input devices. In this study comparison of 12 mens' performance using four input devices (three trackballs: currently used, trackman wheel, and erectly held trackballs, as well as a touch screen) under five motion types of static, heave, roll, pitch, and random movements was conducted. The input device and motion type significantly affected movement speed and accuracy, and their interaction significantly affected the movement speed. The touch screen was the fastest but the least accurate input device. The erectly held trackball was the slowest, whereas the error rate of the currently used trackball was the lowest. Impairments of the random motion on movement time and error rate were larger than those of other motion types. Considering objective and subjective evaluations, the trackman wheel and currently used trackball were more efficient in operation than the erectly held trackball and touch screen under the motion environments.     

Active versus passive proprioceptive straight-ahead pointing in normal subjects

Eighty blindfolded healthy female subjects participated in an active and a passive straight-ahead pointing task to study the estimation of the subjective sagittal middle in the presence or absence of an active haptic exploration. Subjects were to point straight-ahead with their left or right index finger starting from different right- or left-sided locations, while performing either an active movement or with the hand being passively moved by the examiner. Results showed: (i) a significant effect of the hand used only on the active straight-ahead pointing task performance; (ii) a significant effect of the starting position both on the active and passive pointing performance; (iii) a significant correlation between the two protocols only in terms of spatial bias (algebraic error) but not in terms of precision (absolute errors). These results are discussed with regards to normal and neuropsychological studies of the egocentric frame of reference.     

How do alternative ways of responding influence 3- and 4-year-olds’ performance on tests of executive function and theory of mind?

A total of 69 preschool children were tested on measures of false belief understanding (the Unexpected Transfer task), inhibitory control (the Grass/Snow task), and strategic reasoning (the Windows task). For each task, children indicated their response either by pointing with their index finger or by using a nonstandard response mode (pointing with a rotating arrow). The means of responding had no effect on children's performance on the Grass/Snow task or on the Unexpected Transfer task, although children performed better on the Unexpected Transfer task when the key object in the story was removed. In contrast, performance on the Windows task was significantly better when children pointed with the rotating arrow. A follow-up experiment with 79 preschoolers found that this improved performance on the Windows task was sustained even after the nonstandard response mode was removed and children again pointed with their finger. These findings together suggest that nonstandard response modes do not help children to inhibit prepotent pointing responses but may help them to formulate response strategies on reasoning tasks by discouraging unreflective impulsive responding.     

Effects of finger and mouse pointing on learning from online split-attention examples

Background

Self-management of cognitive load is a recent development in cognitive load theory. Finger pointing has been shown to be a potential self-management strategy to support learning from spatially separated, but mutually referring text and pictures (i.e., split-attention examples).

Aims

The present study aimed to extend the prior research on the pointing strategy and investigated the effects of finger pointing on learning from online split-attention examples. Moreover, we examined an alternative pointing strategy using the computer mouse, and a combination of finger pointing and computer-mouse pointing.

Sample

One-hundred and forty-five university students participated in the present study.

Method

All participants studied an online split-attention example about the human nervous system and were randomly allocated to one of four conditions: (1) pointing with the index finger, (2) pointing with the computer mouse, (3) pointing with the index finger and the computer mouse and (4) no pointing.

Results

Results confirmed our main hypothesis, indicating that finger pointing led to higher retention performance than no pointing. However, the mouse pointing strategy and the combined finger and mouse pointing strategy did not show supportive effects.

Conclusions

Finger pointing can be used as a simple and convenient self-management strategy in online learning environments. Mouse pointing may not be as effective as finger pointing.     

Comprehension of signs by dolphins (Tursiops truncatus)

The authors assessed the ability of 6 captive dolphins (Tursiops truncatus) to comprehend without explicit training 3 human communicative signs (pointing, directed gaze, and replica). Pointing consisted of indicating the target item with the index finger and a fully extended arm. Directed gaze consisted of orienting the head and eyes toward the target item while the rest of the body remained stationary. The replica signal consisted of holding up an exact duplicate of the target item. On the initial series of 12 trials for each condition, 3 dolphins performed above chance on pointing, 2 on gaze, and none for replica. With additional trials, above chance performance increased to 4 dolphins for pointing, 6 for gazing, and 2 for replica. The replica sign seemed to be the most taxing for them (only 2 dolphins achieved results significantly above chance). Taken together, these results indicate that dolphins are able to interpret untrained communicative signs successfully.     

The role of mental rotation and age in spatial perspective‐taking tasks: when age does not impair perspective‐taking performance

The relationship between self‐evaluation of sense of direction, mental rotation, and performance in map learning and pointing tasks has been investigated in a life‐span perspective. Study 1 compared younger and older people in the Mental Rotation Test (MRT) and on the Sense of Direction and Spatial Representation (SDSR) Scale. Older people achieved higher scores on the SDSR Scale, but a lower performance in MRT compared with younger participants. In Study 2, groups of younger and older adults, one of each, were matched in the MRT, and pointing tasks in aligned and counter‐aligned perspectives were administered. Our results showed that, when so matched, older participants performed better than the younger counterparts in perspective‐taking tasks, but their performance was worse in map learning. Aligned pointing was performed better than the counter‐aligned task in both age groups, showing an alignment effect. Furthermore the performance in the counter‐aligned pointing was significantly correlated with MRT scores. Copyright © 2006 John Wiley & Sons, Ltd.     

3-D localization of virtual sound sources: Effects of visual environment, pointing method, and training

The ability to localize sound sources in three-dimensional space was tested in humans. In Experiment 1, naive subjects listened to noises filtered with subject-specific head-related transfer functions. The tested conditions included the pointing method (head or manual pointing) and the visual environment (VE; darkness or virtual VE). The localization performance was not significantly different between the pointing methods. The virtual VE significantly improved the horizontal precision and reduced the number of front-back confusions. These results show the benefit of using a virtual VE in sound localization tasks. In Experiment 2, subjects were provided with sound localization training. Over the course of training, the performance improved for all subjects, with the largest improvements occurring during the first 400 trials. The improvements beyond the first 400 trials were smaller. After the training, there was still no significant effect of pointing method, showing that the choice of either head- or manual-pointing method plays a minor role in sound localization performance. The results of Experiment 2 reinforce the importance of perceptual training for at least 400 trials in sound localization studies.     

Higher visuo-Attentional Demands of Multiple Object Tracking (MOT) Lead to A Lower Precision in Pointing Movements

Multiple object tracking (MOT) requires visually attending to dynamically moving targets and distractors. This cognitive ability is based on perceptual-attentional processes that are also involved in goal-directed movements. This study aimed to test the hypothesis that MOT affects the motor performance of aiming movements. Therefore, the participants performed pointing movements using their fingers or a computer mouse that controlled the movements of a cursor directed at the targets in the MOT task. The precision of the pointing movements was measured, and it was predicted that a higher number of targets and distractors in the MOT task would result in a lower pointing precision. The results confirmed this hypothesis, indicating that MOT might influence the performance of motor actions. The potential factors underlying this influence are discussed.     

The orientation of young and older adults' mental representations of their home town with familiar and new landmarks

Familiarity with an environment produces refined mental representations in adults of all ages, but it is not clear whether these representations tend to have a north-up orientation and whether familiarity facilitates the learning of new spatial information, especially in ageing. Thirty-two young and 32 older adults studied a map of their home town that included familiar and new fictitious landmarks, then performed pointing tasks, some aligned with the cardinal points south–north (SN), and others counter-aligned, north–south (NS). A measure of visuo-spatial working memory (VSWM) and a questionnaire on pleasure in exploring were also administered. The results showed that performance was better when pointing SN than NS (alignment effect), whereas pointing performance for familiar landmarks was similar for SN and NS alignments (no alignment effect). No interaction involving age was found. VSWM emerged as a significant predictor of pointing performance. Spatial mental representations of familiar environments are elaborate and flexible as regards familiar landmarks, in both young and older adults; and a familiar layout does not seem to enhance older adults' spatial memory as regards new landmarks.     

Test sensitivity is important for detecting variability in pointing comprehension in canines

Several articles have been recently published on dogs’ (Canis familiaris) performance in two-way object choice experiments in which subjects had to find hidden food by utilizing human pointing. The interpretation of results has led to a vivid theoretical debate about the cognitive background of human gestural signal understanding in dogs, despite the fact that many important details of the testing method have not yet been standardized. We report three experiments that aim to reveal how some procedural differences influence adult companion dogs’ performance in these tests. Utilizing a large sample in Experiment 1, we provide evidence that neither the keeping conditions (garden/house) nor the location of the testing (outdoor/indoor) affect a dogs’ performance. In Experiment 2, we compare dogs’ performance using three different types of pointing gestures. Dogs’ performance varied between momentary distal and momentary cross-pointing but “low” and “high” performer dogs chose uniformly better than chance level if they responded to sustained pointing gestures with reinforcement (food reward and a clicking sound; “clicker pointing”). In Experiment 3, we show that single features of the aforementioned “clicker pointing” method can slightly improve dogs’ success rate if they were added one by one to the momentary distal pointing method. These results provide evidence that although companion dogs show a robust performance at different testing locations regardless of their keeping conditions, the exact execution of the human gesture and additional reinforcement techniques have substantial effect on the outcomes. Consequently, researchers should standardize their methodology before engaging in debates on the comparative aspects of socio-cognitive skills because the procedures they utilize may differ in sensitivity for detecting differences.