静止与动态定位任务中飞行员视觉空间模板的表征计算

Pilots' Computing Representation for VSSP in Static and Dynamic Localization Tasks

采用静止和动态空间定位任务对飞行员与普通被试进行对照研究,考察参照条件、目标数量、空间性质对空间定位的影响,探索静止和动态视觉空间模板表征建构特征及其个体差异。结果显示:(1)在静止空间,有距离参照定位任务是较易任务而无距离参照任务较难,飞行员的无距离参照任务完成较好;(2)在运动空间,有运动轨迹参照定位任务较易而无轨迹参照任务较难,飞行员两种任务均完成较好,无参照条件使控制组正确率大为下降。(3)两组在双目标任务上的差异比之单目标任务更大,且飞行员表现出双目标协同优势。结论:飞行员视觉空间模板的功能更强,表现为对静止空间形成较为准确距离表征、对运动空间即时建构运动轨迹表征。

The visuo-spatial sketchpad （VSSP） is a temporary storage system for generating and manipulating visuo-spatial images. Preserving and manipulating limited on-line visual information is an important fanetion of a visual processing system. Some recent findings have confirmed that the VSSP may be divided into two sub-components processing static or dynamic visual information. This study adopted spatial localization tasks, as more typical spatial working memory tasks, to explore the representation construction characteristics of the static and dynamic VSSP as well as its individual differences. A pilot group and a non-pilot group were recruited to make a comparison of their processing properties in the static and dynamic spatial localization tasks. Experiment la set up two single-target localization tasks in static spatial version, namely distance reference spatial localization tasks and no-distance reference spatial localization tasks. Experiment lb was a variant of Experiment la with double-target localization tasks under each condition. Experiment 2a developed two dynamic spatial single-target localization tasks, as trajectory reference spatial localization tasks and no- trajectory reference spatial localization tasks, respectively. Experiment 2b extended two double-target localization tasks on the basis of Experiment 2a. The experimental design focused on effects of the reference condition, the target amount and the spatial nature of the spatial localization. The results showed that in static display the distance reference spatial localization tasks were easier tasks and the no-distance reference localization tasks were more difficult. There was no significant difference in the distance reference localization tasks between pilot group and non-pilot group. However, pilot group performed better in the no-distance reference localization tasks. In dynamic tasks, the trajectory reference localization tasks were easier tasks and the no-trajectory reference localization tasks, which required immediate construction of trajectory representation, belonged to more difficult tasks. Pilot group had higher accuracy in both dynamic tasks. Compared to the condition of trajectory reference, the condition of no- trajectory reference caused non-pilot group to score significantly lower. The difference between the two groups in the double-target localization tasks was much more greater than which in the single-target tasks. Compared to the control group, the pilot group exhibited double target synergies in the double-target tasks. This study has found that pilots＇ VSSP had better performance in processing visual-spatial information, involving supervisory attentional system engaged in computation and reconstruction spatial representation. Pilots could complete clear distance representation more precisely in static spatial display while their computational advantage in dynamic tasks was reflected in constructing on-line trajectory representation and then forming a stationary configuration. These findings raise questions about the hypothesis that the VSSP can manipulate complex visual-spatial information. The innovations of this study are as follows. First, dynamic spatial localization tasks were developed according to Gordon＇s static tasks （1986）. Second, double-target localization tasks were set up under the static and the dynamic spatial conditions, and the synergistic effect of the double targets was found better inthe pilot group. Third, two kinds of control tasks were adopted to comparatively explore the representation construction of VSSP in static and dynamic localization tasks. Finally, the experience advantage of pilot found in this study provides empirical reference for the future selection and training of pilots.