TO HALVE AND TO HALVE NOT - AN ANALYSIS OF LINE BISECTION JUDGMENTS IN NORMAL SUBJECTS
TO HALVE AND TO HALVE NOT - AN ANALYSIS OF LINE BISECTION JUDGMENTS IN NORMAL SUBJECTS
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DOI：
10.1016/0028-3932(92)90055-q
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发表时间：
1992-06-01
期刊：
影响因子：
2.6
通讯作者：
PAGLIARINI, L
中科院分区：
文献类型：
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作者：
MILNER, AD;BRECHMANN, M;PAGLIARINI, L
正常成年人接受了一系列三个实验的测试，以检查空间位置和线索对线平分判断的影响。所有三个实验中的判断都受到行一端或另一端字母提示的强烈影响。线条的空间位置（在左侧、中央或右侧身体空间）在实验 1 和 2 中也有较小的影响，其中还发现了当线条居中呈现时存在小的恒定误差的证据。从实验 2 和 3 的结果来看，不需要明确的二分反应，感知/注意因素，而不是定向偏差，在调节提示效应中发挥着主要作用。结论是，注意力对范围判断有显着影响，注意力较少会减少感知的相对线长度。然而，恒定误差和空间位置的影响虽然本质上主要是感知性的，但也可能部分由半球激活差异引起的运动前定向偏差决定。
Normal adults were tested in a series of three experiments to examine the influences of spatial location and cueing upon line bisection judgements. Judgements in all three experiments were strongly influenced by cueing with a letter at one or other end of the line. The spatial location of the line (in left, central or right body space) also had a minor effect in Experiments 1 and 2, where evidence was additionally found for a small constant error when lines were presented centrally. It is argued from the results of Experiments 2 and 3, where no explicit bisection response was required, that perceptual/attentional factors, rather than an orienting bias, play the major role in mediating the cueing effect. It is concluded that there is a substantial attentional effect upon judgements of extent, whereby paying less attention decreases perceived relative line length. However the constant error and the effect of spatial location, whilst mainly perceptual in nature, may also be partly determined by premotor orienting biases caused by differential hemispheric activation.