Levy Jerre, Yovel Galit, Bean Matthew
University of Chicago, 5848 S University Ave, Chicago, IL 60637, USA.
Brain Lang. 2003 Jun;85(3):432-40. doi: 10.1016/s0093-934x(03)00056-7.
The influence of lateralized unattended stimuli on the processing of attended stimuli in the opposite visual field can shed light on the nature of information that is transferred between hemispheres. On a cued bilateral task, participants tried to identify a syllable in the attended visual field, which elicits a left hemisphere (LH) advantage and different processing strategies by the two hemispheres. The same or a different syllable or a neutral stimulus appeared in the unattended field. Transmission of unattended syllable codes between hemispheres is symmetric, as revealed by equal interference for the two visual fields. The LH is more accurate than the RH in encoding unattended syllables, as indicated by facilitation in the left but not right visual field and a greater frequency of identifiable intrusions into the left than right field. However, asymmetric encoding strategies are different for attended and unattended syllables.
非注意侧化刺激对相对视野中注意刺激加工的影响，有助于揭示半球间传递的信息的本质。在一个线索化双侧任务中，参与者试图识别注意视野中的一个音节，这会引发左半球优势以及两个半球不同的加工策略。在非注意视野中会出现相同或不同的音节或中性刺激。半球间非注意音节编码的传递是对称的，这通过两个视野的同等干扰得以体现。在编码非注意音节时，左半球比右半球更准确，这表现为左视野而非右视野出现促进作用，并且侵入左视野的可识别情况比右视野更频繁。然而，注意音节和非注意音节的编码策略是不对称的。
