PsPM-VIS: SCR, ECG, respiration and eyetracker measurements in a delay fear conditioning task with visual CS and electrical US

This dataset consists of a three-block experiment conducted with 29 healthy unmedicated participants (17 females and 12 males aged 25.3 +/- 3.7). The experiment contains a classical (Pavlovian) discriminant delay fear conditioning test. CSs are 2 full-screen fractals of approximate brightness, contrast, and spatial frequency. US is a train of electric square pulses delivered with a constant current stimulator on participants' dominant forearm through a pin-cathod/ring-anode configuration. SOA between the CS and US is 3.5 s. The first 2 blocks are fear acquisition, with 15 CS+US+, 15 CS+US-, and 30 CS- in each block, and the last block is an extinction phase with 20 CS- and 20 CS+ trials without US delivery. The order of trials in each block was randomized. No fixation cross was presented during CS. ITI is randomly determined on each trial to be an integer between 7 - 11 s. During ITI, a black fixation cross was presented in the center of a grey background (RGB 0.7, 0.7, 0.7). The blocks were recorded on the same day with a self-paced break. For all three blocks this dataset contains skin conductance responses (SCR), electrocardyogram (ECG), respiration, pupil size (PSR), and gaze coordinates measurements.本数据集包含一项针对29名未服药的健康受试者（17名女性、12名男性，年龄25.3±3.7岁）开展的三区块实验。该实验采用经典（巴甫洛夫式）辨别延迟恐惧条件反射测试范式。条件刺激（CS，Conditioned Stimulus）为2幅全屏分形图案，其亮度、对比度与空间频率基本一致。无条件刺激（US，Unconditioned Stimulus）为通过恒流刺激器，以针状阴极/环形阳极配置，施加于受试者优势前臂的方形电脉冲序列。条件刺激与无条件刺激间的刺激呈现异步间隔（SOA，Stimulus Onset Asynchrony）为3.5秒。前两个区块为恐惧习得阶段，每个区块包含15次CS+US+配对试次、15次CS+US-配对试次以及30次CS-试次；最后一个区块为消退阶段，包含20次CS-试次与20次CS+试次，且不施加无条件刺激。每个区块内的试次顺序均经随机化处理。条件刺激呈现期间无固定十字提示。试次间间隔（ITI，Inter-Trial Interval）在7至11秒的整数范围内随机设定。试次间隔期间，灰色背景（RGB值为0.7, 0.7, 0.7）的中央会呈现黑色固定十字。所有三个区块均于同日完成，受试者可自行安排休息时长。本数据集记录了全部三个区块的皮肤电反应（SCR，Skin Conductance Response）、心电图（ECG，Electrocardiogram）、呼吸信号、瞳孔尺寸（PSR，Pupil Size Response）以及注视坐标测量数据。