掩蔽线索引发的注意定向——易化和抑制

Effect of Masked Cue on Attentional Orienting—Facilitation and Inhibition

采用空间线索化范式,考察了阈下线索引发的外源性注意定向。实验一调控线索和掩蔽呈现时间设置最佳阈下参数;实验二和实验三分别采用检测和辨别任务,考察了多SOA下阈下线索引发的外源性空间注意定向。结果发现,无论在检测任务还是辨别任务中,阈下线索均可引发抑制效应,且完成辨别任务时得到了注意定向的双阶段效应———易化和抑制。这表明,在不需要意识参与下阈下线索可以引导注意,产生易化效应与抑制效应,后者的机制可能与返回抑制相同。

We used the cue-target paradigm together with the masked cue to study the relation between invisible cue and exogenous spatial attentional orienting by manipu- lating the SOA. In Experiment 1 （28 undergraduate stu- dents） ,we controlled the cue duration and mask duration and asked participants to locate the cue to make sure that the cue was really invisible. Subsequently, us- ing parameters （cue duration for 10ms, mask duration for 80ms） of Exp. 1, we manipulated the multiple SOA （370ms/570ms/770ms/970rns） and asked participants to detect the target （Experiment 2, 19 undergraduate students） and discriminate the color of the target （Experiment 3,25 undergraduate students）. We found that the invisible cue could induce an IOR at 570ms of SOA in the de- tection task （Exp. 2）, whereas the facilitation effect （SOA = 570ms） was followed by an inhibition effect （SOA = 770ms） in the color discrimination task. The results showed that （1）the invisible cue could induce the exogenous spatial attentional orienting dual effect （ facilitation and inhibition） ; （2） the mechanism of subthreshold inhibition of return （induced by invisible cue） might be the same as the classic inhibition of return.