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采用多目标追踪和点探测刺激觉察任务相结合的实验范式,考察目标和非目标数量变化对多目标追踪的选择性抑制效应。实验一设置非目标恒定而变化目标数量,结果发现:随着目标数量的增加,目标与非目标间的抑制差异量不随目标数量变化而变化。实验二设置目标恒定而变化非目标数量,结果发现:在非目标数量变化的三种水平下,目标与非目标间的抑制差异量也无显著差异。综合实验结果表明:在多目标追踪的追踪容量或抑制容量范围内,抑制差异量对目标数量或非目标数量变化是不敏感的;注意资源分配方式在一定范围内保持相对稳定。
The experimental paradigm combining multi-target tracking and spot-detection stimulus-awareness task was used to investigate the selective inhibitory effect of the change in the number of targets and non-targets on multi-target tracking. In Experiment 1, we set the number of non-target constant and change targets. The results show that as the number of targets increases, the difference between target and non-target inhibition does not change with the number of targets. In experiment two, we set the target constant and change the number of non-target, and found that there is no significant difference in the amount of inhibition between target and non-target at three levels of non-target quantity change. The experimental results show that in the range of tracking capacity or suppression capacity of multi-target tracking, the amount of suppression is not sensitive to the change of target quantity or non-target quantity. Attention should be paid to resource allocation in a certain range to maintain relative stability.