Frequency Based Modulation of Salient Distractor Suppression is Contingent on Task Difficulty

The data set is from a series of two eye tracking experiments testing the role of statistical learning induced by frequency manipulation of salient distractor trials on its the suppression during active visual search. Salient distractor present trials could make up for 20%, 50% and 80% of total trials, along with salient distractor absent trials, in each block. We expected RTs, dwell time, and saccade latency and percentage of saccades to indicate suppression of salient distractor and that it would vary across blocks. The trial reports were used for reaction time and accuracy analysis, the fixation report for dwell time analysis and percent of fixations, and the saccade report for first saccade latency and proportion analysis. The experiment has a distractor (present vs absent) and block (20,50,80) within-subjects design. The raw data files as well as R codes for linear mixed model analysis are available here.
We found better suppression in the 20 and 80 block compared to the 50 block.

本数据集源自一系列旨在检验由显著性干扰试次频率操纵所引发的统计学习在主动视觉搜索过程中的抑制作用的眼动追踪实验。在每个实验块中，显著性干扰试次的出现频率可占总试次的20%、50%及80%，并与显著性干扰试次缺失的试次相伴随。我们预期反应时间、注视时间以及眼跳潜伏期和眼跳百分比等指标将指示显著性干扰的抑制效果，并认为这种效果将在不同实验块中存在差异。试验报告被用于反应时间和准确率的分析，注视报告用于注视时间的分析和注视百分比的统计，眼跳报告则用于首次眼跳潜伏期和比例的分析。实验采用了干扰（存在与缺失）和块（20、50、80）的受试者内设计。原始数据文件以及用于线性混合模型分析的R代码均在此处提供。我们发现，在20和80块中，对显著性干扰的抑制效果优于50块。