SRM Resting-state EEG

# SRM Resting-state EEG

## Introduction

This EEG dataset contains resting-state EEG extracted from the experimental
paradigm used in the *Stimulus-Selective Response Modulation* (SRM) project at
the Dept. of Psychology, University of Oslo, Norway.

The data is recorded with a BioSemi ActiveTwo system, using 64 electrodes
following the positional scheme of the extended 10-20 system (10-10).
Each datafile comprises four minutes of uninterrupted EEG acquired while the
subjects were resting with their eyes closed. The dataset includes EEG from
111 healthy control subjects (the "t1" session), of which a number underwent
an additional EEG recording at a later date (the "t2" session). Thus, some
subjects have one associated EEG file, whereas others have two.

### Disclaimer

The dataset is provided "as is". Hereunder, the authors take no responsibility
with regard to data quality. The user is solely responsible for ascertaining
that the data used for publications or in other contexts fulfil the required
quality criteria.

## The data

### Raw data files

The raw EEG data signals are rereferenced to the average reference. Other than
that, no operations have been performed on the data. The files contain no
events; the whole continuous segment is resting-state data. The data signals
are unfiltered (recorded in Europe, the line noise frequency is 50 Hz). The
time points for the subject's EEG recording(s), are listed in the *_scans.tsv
file (particularly interesting for the subjects with two recordings).

Please note that the quality of the raw data has **not** been carefully
assessed. While most data files are of high quality, a few might be of poorer
quality. The data files are provided "as is", and it is the user's
esponsibility to ascertain the quality of the individual data file.

### /derivatives/cleaned_data

For convenience, a cleaned dataset is provided. The files in this derived
dataset have been preprocessed with a basic, fully automated pipeline (see
/code/s2_preprocess.m for details) directory for details. The derived files are
stored as EEGLAB .set files in a directory structure identical to that of the
raw files. Please note that the *\*_channels.tsv* files associated with the
derived files have been updated with status information about each channel
("good" or "bad"). The "bad" channels are – for the sake of consistency –
interpolated, and thus still present in the data. It might be advisable to
remove these channels in some analyses, as they (per definition) do not provide
anything to the EEG data. The cleaned data signals are referenced to the
average reference (including the interpolated channels).

Please mind the automatic nature of the employed pipeline. It might not perform
optimally on all data files (*e.g.* over-/underestimating proportion of bad
channels). For publications, we recommend implementing a more sensitive
cleaning pipeline.

### Demographic and cognitive test data

The *participants.tsv* file in the root folder contains the variables age,
sex, and a range of cognitive test scores. See the sidecar participants.json
for more information on the behavioural measures. Please note that these
measures were collected in connection with the "t1" session recording.

## How to cite

All use of this dataset in a publication context requires the following paper
to be cited:

Hatlestad-Hall, C., Rygvold, T. W., & Andersson, S. (2022). BIDS-structured
resting-state electroencephalography (EEG) data extracted from an experimental
paradigm. Data in Brief, 45, 108647. https://doi.org/10.1016/j.dib.2022.108647

## Contact

Questions regarding the EEG data may be addressed to
Christoffer Hatlestad-Hall ([e-mail]).

Question regarding the project in general may be addressed to
Stein Andersson ([e-mail]) or
Trine W. Rygvold ([e-mail]).

# SRM静息态脑电图（SRM Resting-state EEG）

## 引言
本脑电图（electroencephalography，EEG）数据集源自挪威奥斯陆大学心理学系**刺激选择性反应调制（Stimulus-Selective Response Modulation，SRM）**项目的实验范式，提取得到静息态脑电图（resting-state EEG）数据。

数据采用BioSemi ActiveTwo系统采集，使用64个电极，遵循扩展10-20系统（10-10）的电极定位布局。每份数据文件包含受试者闭眼静息状态下采集的4分钟连续脑电图数据。本数据集包含111名健康对照受试者的脑电图数据（对应"t1次访视"），其中部分受试者在后续时间点接受了额外的脑电图记录（对应"t2次访视"）。因此，部分受试者仅对应1份脑电图文件，其余受试者则对应2份文件。

### 免责声明
本数据集按"现状"提供。作者不对数据质量承担任何责任。使用者需自行确认用于发表或其他场景的数据符合既定质量标准。

## 数据详情
### 原始数据文件
原始脑电图信号已转换为平均参考（average reference），除此之外未进行任何其他处理。文件中不包含事件标记，全部连续片段均为静息态脑电图数据。信号未经过滤波（采集地为欧洲，市电噪声（line noise）频率为50Hz）。受试者脑电图采集的时间点记录在*_scans.tsv文件中（对于拥有两次记录的受试者尤为重要）。

请注意，原始数据的质量未经过严格评估。尽管多数数据文件质量优良，但仍有部分文件质量欠佳。本数据集按"现状"提供，使用者需自行确认单份数据文件的质量。

### /derivatives/cleaned_data
为便于使用，本数据集附带清洗后的数据版本。该衍生数据集的文件已通过基础全自动预处理流程进行处理（详见/code/s2_preprocess.m文件）。衍生文件采用EEGLAB .set格式存储，目录结构与原始文件完全一致。请注意，与衍生文件配套的*_channels.tsv文件已更新，包含各通道的状态信息（"良好"或"不良"）。为保证一致性，所有标记为"不良"的通道均经过插值修复，因此仍保留在数据中。在部分分析中，移除这些通道或许更为妥当，因为根据定义，它们无法为脑电图数据提供有效信息。清洗后的数据信号采用平均参考（average reference，包含插值修复的通道）。

请注意，本预处理流程为全自动流程，未必能在所有数据文件上达到最优效果（例如，可能高估或低估不良通道的占比）。若用于发表研究，建议采用更为灵敏的清洗流程。

### 人口统计学与认知测验数据
根目录下的*participants.tsv文件包含年龄、性别以及一系列认知测验得分等变量。如需了解行为测评指标的详细信息，请参阅附属文件*participants.json。请注意，上述人口统计学与认知测验数据均采集于"t1次访视"的脑电图记录期间。

## 引用方式
若在出版物中使用本数据集，请引用以下文献：
Hatlestad-Hall, C., Rygvold, T. W., & Andersson, S. (2022). BIDS结构化（BIDS-structured）静息态脑电图数据源自一项实验范式. 数据简报, 45, 108647. https://doi.org/10.1016/j.dib.2022.108647

## 联系方式
若有关于脑电图数据的疑问，请联系Christoffer Hatlestad-Hall（邮箱：[e-mail]）。
若有关于本项目的一般性疑问，请联系Stein Andersson（邮箱：[e-mail]）或Trine W. Rygvold（邮箱：[e-mail]）。

搜集汇总

背景与挑战

背景概述

该数据集是一个静息态脑电图数据集，包含111名健康受试者的闭眼静息EEG记录，每段记录持续4分钟，使用64电极BioSemi系统采集。数据集提供原始和预处理后的清洗版本，并附有人口统计学和认知测试数据，遵循BIDS标准，适用于脑电信号分析和神经科学研究。