THE ECCENTRICITY EFFECT - TARGET ECCENTRICITY AFFECTS PERFORMANCE ON CONJUNCTION SEARCHES
THE ECCENTRICITY EFFECT - TARGET ECCENTRICITY AFFECTS PERFORMANCE ON CONJUNCTION SEARCHES
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DOI：
10.3758/bf03208380
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发表时间：
1995-11-01
期刊：
影响因子：
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通讯作者：
KATZ, SM
中科院分区：
文献类型：
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作者：
CARRASCO, M;EVERT, DL;KATZ, SM
在联合视觉搜索任务中发现的系列模式被归因于隐蔽的注意力转移，尽管尚未考虑目标位置可能产生的影响。为了研究目标位置对朝向×颜色联合搜索的影响，对目标的持续时间及其在显示中的位置进行了操控。显示要么一直呈现到被试做出反应（实验1），要么呈现104毫秒（实验2），要么呈现62毫秒（实验3）。目标的离心率对表现有关键影响：在所有三个实验中，明显的离心率效应非常相似；随着离心率增加，反应时间和错误逐渐增加。此外，随着目标离心率增加，集合大小效应变得更加明显，并且对于较大的集合大小，离心率效应的程度也增加。此外，根据逐步回归分析，目标离心率及其与集合大小的相互作用是表现的良好预测指标。我们认为这些发现可以用空间分辨率和侧抑制因素来解释。对朝向×颜色联合搜索的系列自终止假设进行了评估并被拒绝。我们将这三个联合实验中的离心率效应以及朝向不对称的程度与特征实验中发现的情况（卡拉斯科和卡茨，1992）进行了比较。讨论了眼球运动、空间分辨率和隐蔽注意力在离心率效应中的作用及其影响。
The serial pattern found for conjunction visual-search tasks has been attributed to covert attentional shifts, even though the possible contributions of target location have not been considered. To investigate the effect of target location on orientation X color conjunction searches, the target's duration and its position in the display were manipulated. The display was present either until observers responded (Experiment 1), for 104 msec (Experiment 2), or for 62 msec (Experiment 3). Target eccentricity critically affected performance: A pronounced eccentricity effect was very similar for all three experiments; as eccentricity increased, reaction times and errors increased gradually. Furthermore, the set-size effect became more pronounced as target eccentricity increased, and the extent of the eccentricity effect increased for larger set sizes. In addition, according to stepwise regressions, target eccentricity as well as its interaction with set size were good predictors of performance. We suggest that these findings could be explained by spatial-resolution and lateral-inhibition factors. The serial self-terminating hypothesis for orientation X color conjunction searches was evaluated and rejected. We compared the eccentricity effect as well as the extent of the orientation asymmetry in these three conjunction experiments with those found in feature experiments (Carrasco & Katz, 1992). The roles of eye movements, spatial resolution, and covert attention in the eccentricity effect, as well as their implications, are discussed.