IllusionGameEEG_data
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# Overview This dataset was collected in 2022-20233 and comprises electroencephalography, physiological and behavioural data acquired from 103 healthy individuals (ages: 21-45). The task was administered as part of a larger study. # Task Description ## Illusion Game (IG) The aim of this task is to investigate people's sensitivity to visual illusions as a general, common factor. Using Pyllusion, which enabled us to manipulate the objective parameters of visual illusions, we generated stimuli of varying task difficulty and illusion strength for 3 different classic illusions (Ebbinghaus, Müller-Lyer and Vertical-Horizontal). We then created an experimental task in which participants were instructed to make perceptual judgements about targets in the illusion as quickly as possible, ignoring its context, which biases their perception of the illusion. For instance, in the Müller-Lyer illusion, the same-length line segments (*targets*) appear to have different lengths if they end with inwards vs. outwards pointing arrows (*context*). The first series of the 3 illusion blocks (each comprising 64 trials) were first presented to participants in a randomized order, followed by a short break, after which participants performed the second series of blocks displayed in a newly randomized order. In total, each participant performed 384 illusion trials (6*64). ## Resting State Before the start of the illusion task, paricipants were instructed to keep their eyes closed for 8 minutes. At the end of the resting period, a 'beep' soundclip was played to cue participants to open their eyes. An adapted version of the Amsterdam Resting State Questionnaire (Diaz et al., 2014) was then administered to examine participants' subjective resting state experience. ## NOTES Due to a technical error, sub-FFE111 and sub-FFE116 do not have any physiological data, and sub-FFE117, sub-FFE139 and sub-FFE146 do not have behavioural data for the illusion game task. EEG data collection was split into 6 runs corresponding to each block of illusion trials for sub-FFE111 and sub-FFE121 during pilot testing. EEG data collection was collected twice for sub-FFE007 due to a technical glitch that occcured in the middle of illusion task trials. # Data acquisition ## EEG data acquisition EEG signals were recorded using the EasyCap 64-channel and BrainVision Recording system. Electrodes were placed on the EEG cap according to the standard 10-5 system of electrode placement (Oostenveld & Praamsrta, 2001) and impedance was kept below 12 kOhm for each subject. The ground electrode was placed on the forehead the Cz was used as the reference channel. During recording, the sampling rate was 10000Hz. Note that channels Tp9 and Tp10 were placed near the outer canthi of each eye, and POz as well as Oz were fixed above and below one of the eyes to measure the E0G. ## Physiological data acquisition Participants' physiological signals, that is their electrocardiogram (*ECG*), photoplethysmograph (PPG) and respiration signals (*RSP*), were obtained at a sampling frequency of 1000Hz. All physiological signals were recorded via the PLUX OpenSignals software and BITalino Toolkit. ECG was collected using three ECG electrodes placed according to a modified Lead II configuration, and RSP was acquired using a respiration belt tightened over participants' upper abdomen. PPG sensors, which record changes in blood volume, were clipped on the tip of the index finger of participants' non-dominant hand to meaure heart rate and oxygen saturation. References ---------- Diaz, B. A., Van Der Sluis, S., Benjamins, J. S., Stoffers, D., Hardstone, R., Mansvelder, H. D., ... & Linkenkaer-Hansen, K. (2014). The ARSQ 2.0 reveals age and personality effects on mind-wandering experiences. Frontiers in psychology, 5, 271.
# 概述 本数据集采集于2022-20233年，包含来自103名健康个体（年龄21~45岁）的脑电图（electroencephalography）、生理及行为学数据，相关任务为一项大型研究的子任务。 # 任务描述 ## 错觉游戏任务（Illusion Game, IG） 本任务旨在探究个体作为普遍共性的视觉错觉敏感性。借助Pyllusion工具，我们可对视觉错觉的客观参数进行调控，针对埃宾浩斯错觉（Ebbinghaus）、缪勒-莱耶错觉（Müller-Lyer）以及垂直-水平错觉这三种经典错觉，生成了任务难度与错觉强度各不相同的刺激材料。随后我们设计了一项实验任务，要求参与者尽可能快速地对错觉中的目标刺激做出知觉判断，同时忽略会影响其错觉知觉的背景线索。例如在缪勒-莱耶错觉中，等长的线段（*目标刺激*）若两端带有向内或向外的箭头（*背景线索*），看起来长度会有所不同。3个错觉任务组块（每个组块含64次试次）的第一组将以随机顺序呈现给参与者，随后安排短暂休息，之后参与者将完成第二组以全新随机顺序呈现的任务组块。每名参与者总计需完成384次错觉试次（6×64）。 ## 静息状态任务（Resting State） 在错觉任务开始前，参与者需保持闭眼状态8分钟。静息阶段结束时，将播放“嘀”声提示音以提示参与者睁眼。随后我们将使用改编版《阿姆斯特丹静息状态问卷（Amsterdam Resting State Questionnaire）》（Diaz等人，2014）评估参与者的主观静息状态体验。 ## 备注 由于技术故障，sub-FFE111与sub-FFE116无任何生理数据，sub-FFE117、sub-FFE139及sub-FFE146无错觉游戏任务的行为学数据。 在预实验阶段，sub-FFE111与sub-FFE121的脑电图数据采集分为6个段，分别对应每个错觉试次组块。 由于在错觉任务试次进行中出现技术故障，sub-FFE007的脑电图数据被采集了两次。 # 数据采集 ## 脑电图数据采集 脑电图信号采用EasyCap 64通道设备与BrainVision记录系统进行采集。电极按照标准10-5系统（Oostenveld & Praamstra, 2001）排布于脑电图帽上，每名受试者的电极阻抗均控制在12 kΩ以下。接地电极置于前额，以Cz作为参考电极。采集过程中采样率为10000Hz。需注意，Tp9与Tp10通道分别置于双眼外眦附近，POz与Oz分别置于一只眼睛的上下方，用于采集眼电图（EOG，原文笔误为E0G）。 ## 生理数据采集 参与者的生理信号包括心电图（electrocardiogram, ECG）、光电容积描记信号（PPG）以及呼吸信号（respiration signals, RSP），采样频率为1000Hz。所有生理信号均通过PLUX OpenSignals软件与BITalino Toolkit采集。 心电图采用3个电极按照改良的双极II导联构型进行采集，呼吸信号通过绑定于参与者上腹部的呼吸带获取。光电容积传感器可记录血容量变化，被夹于参与者非利手的食指指尖，用于测量心率与血氧饱和度。 参考文献 ---------- Diaz, B. A., Van Der Sluis, S., Benjamins, J. S., Stoffers, D., Hardstone, R., Mansvelder, H. D., 等 & Linkenkaer-Hansen, K. (2014). 《ARSQ 2.0揭示年龄与人格对走神体验的影响》. 《心理学前沿》, 5, 271.
