Oslo Metropolitan University.
J Exp Anal Behav. 2022 Nov;118(3):425-441. doi: 10.1002/jeab.795. Epub 2022 Aug 24.
Eye-tracking has been used to investigate observing responses in matching-to-sample procedures. However, in visual search, peripheral vision plays an important role. Therefore, three experiments were conducted to investigate the extent to which adult participants can discriminate stimuli that vary in size and position in the periphery. Experiment 1 used arbitrary matching with abstract stimuli, Experiment 2 used identity matching with abstract stimuli, and Experiment 3 used identity matching with simple (familiar) shapes. In all three experiments, participants were taught eight conditional discriminations establishing four 3-member classes of stimuli. Four different stimulus sizes and three different stimulus positions were manipulated in the 12 peripheral test phases. In these test trials, participants had to fixate their gaze on the sample stimulus in the middle of the screen while selecting a comparison stimulus. Eye movements were measured with a head-mounted eye-tracker during both training and testing. Experiment 1 shows that participants can discriminate small abstract stimuli that are arbitrarily related in the periphery. Experiment 2 shows that matching identical stimuli does not affect discrimination in the periphery compared to arbitrarily related stimuli. However, Experiment 3 shows that discrimination increases when stimuli are well-known simple shapes.
眼动追踪技术已被用于研究匹配样本程序中的观察反应。然而，在视觉搜索中，周边视觉起着重要作用。因此，进行了三项实验来研究成年参与者在多大程度上可以辨别在周边位置和大小上变化的刺激。实验 1 使用任意匹配和抽象刺激，实验 2 使用身份匹配和抽象刺激，实验 3 使用身份匹配和简单（熟悉）形状。在所有三个实验中，参与者都学习了建立四个三成员类刺激的八个条件辨别。在 12 个周边测试阶段中，对四个不同的刺激大小和三个不同的刺激位置进行了操作。在这些测试试验中，参与者必须在屏幕中间固定注视样本刺激，同时选择比较刺激。在训练和测试过程中，使用头戴式眼动追踪器测量眼动。实验 1 表明，参与者可以在周边位置辨别出小的抽象刺激，这些刺激是任意相关的。实验 2 表明，与任意相关的刺激相比，匹配相同的刺激不会影响周边的辨别。然而，实验 3 表明，当刺激是熟悉的简单形状时，辨别能力会提高。
