Inhibition Of Return Of Location-based In The Deaf People

Inhibition of Return (IOR) is found in the field of spatial selective attention. The sudden change of the stimulation in the space will automatic affect attention orienting ,and induce reflexive shift and more accuracy of spatial attention to the stimulation . This phenomenon is called facilitate. In the further study of attention cueing, a loss of response time on cue-position compared with response time on uncued position when the temporal interval between the two onsets is relatively long(greater than 300ms),this mechanism is called IOR. This response tendency is reflex and independence,the cue-position response time minus the uncued position response time is regarded as the value of IOR. There are four experiments in this study to discuss the characteristic of location-based IOR in both hearing and deaf subjects. All the experiments are mixed design of 2×4×2. The experiment 1 and experiment 2 respectively discuss the characteristic of location-based IOR in both hearing and deaf subjects whether the central cue is placed or not in detection tasks. The result of experiment 1 and experiment 2 is that the deaf subjects response more quickly than the hearing subjects,which demonstrate that deaf people possess enhanced peripheral attentive resources as compared with hearing people, this advantage is also found in simple tasks such as symbol detection task, here is evidence that the central cues can induce IOR effect occurred more earlier in hearing people, but it does no matter in deaf people;IOR effect in deaf people is bigger than the hearing subjects at short Stimulus Onset Asynchrony (SOA). The experiment 3 and experiment 4 respectively discuss the characteristic of location-based IOR in both hearing and deaf subjects whether the central cue is placed or not in discrimination tasks. The result of experiment 3 shows both IOR effect of hearing and deaf subjects, but IOR of deaf subjects disappear more early than the hearing people. The result of experiment 4 shows that IOR effect of hearing subjects is only found when SOA is 650ms ,at all SOAs deaf subjects have no IOR; IOR effect in deaf people is smaller than the hearing subjects at all SOAs. Those results suggest that spatial attention adjust mechanism of deaf subjects may be influenced by different task needs, and is more affective and tactic than hearing subjects.