Assessing tDCS Placebo Effects on EEG and Cognitive Tasks

Tine Holmback Petersen; Sadasivan Puthusserypady

doi:10.1109/EMBC.2019.8857549

Assessing tDCS Placebo Effects on EEG and Cognitive Tasks

Tine Holmback Petersen, Sadasivan Puthusserypady

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

Abstract

Divergent thinking (DT) using transcranial direct current stimulation (tDCS) has previously been documented with promising results. This paper examines the placebo effect of tDCS. The reaction from a placebo group was tapped using electroencephalogram (EEG). Their performance was measured as a creativity score and compared to a control group. The experiments included multiplication problems and two DT tasks: Alternative Uses Tasks (AUT) and Instances Task (IT). Neither of the groups were sham stimulated during AUT, but during IT the placebo group was sham stimulated. An automatic noise-detection algorithm was developed to remove the speech-induced EEG noise. Features of power, Welchs power spectral density (WPSD) and Welchs cross PSD (WCPSD)/frequency-band/channel were extracted and fed to the Support Vector Machine (SVM) classifiers. The χ²-test showed a significant difference (p<0.001) between the no stimulation and sham stimulation conditions when compared to the control group, confirming a placebo effect.

Original language	English
Title of host publication	Proceedings of 2019 41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Number of pages	4
Publisher	IEEE
Publication date	2019
Pages	4509-4512
ISBN (Print)	978-1-5386-1311-5
DOIs	https://doi.org/10.1109/EMBC.2019.8857549
Publication status	Published - 2019
Event	41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society - CityCube Berlin, Berlin, Germany Duration: 23 Jul 2019 → 27 Jul 2019 Conference number: 41 https://embc.embs.org/2019/

Conference

Conference	41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Number	41
Location	CityCube Berlin
Country/Territory	Germany
City	Berlin
Period	23/07/2019 → 27/07/2019
Internet address	https://embc.embs.org/2019/

Access to Document

10.1109/EMBC.2019.8857549

OpenUrl availability

Full text

Cite this

@inproceedings{b29a81f5e2c749538c0408d39c03bd0d,

title = "Assessing tDCS Placebo Effects on EEG and Cognitive Tasks",

abstract = "Divergent thinking (DT) using transcranial direct current stimulation (tDCS) has previously been documented with promising results. This paper examines the placebo effect of tDCS. The reaction from a placebo group was tapped using electroencephalogram (EEG). Their performance was measured as a creativity score and compared to a control group. The experiments included multiplication problems and two DT tasks: Alternative Uses Tasks (AUT) and Instances Task (IT). Neither of the groups were sham stimulated during AUT, but during IT the placebo group was sham stimulated. An automatic noise-detection algorithm was developed to remove the speech-induced EEG noise. Features of power, Welchs power spectral density (WPSD) and Welchs cross PSD (WCPSD)/frequency-band/channel were extracted and fed to the Support Vector Machine (SVM) classifiers. The χ2-test showed a significant difference (p<0.001) between the no stimulation and sham stimulation conditions when compared to the control group, confirming a placebo effect.",

author = "Petersen, {Tine Holmback} and Sadasivan Puthusserypady",

year = "2019",

doi = "10.1109/EMBC.2019.8857549",

language = "English",

isbn = "978-1-5386-1311-5",

pages = "4509--4512",

booktitle = "Proceedings of 2019 41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society",

publisher = "IEEE",

address = "United States",

note = "41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2019 ; Conference date: 23-07-2019 Through 27-07-2019",

url = "https://embc.embs.org/2019/",

}

Petersen, TH & Puthusserypady, S 2019, Assessing tDCS Placebo Effects on EEG and Cognitive Tasks. in Proceedings of 2019 41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE, pp. 4509-4512, 41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society, Berlin, Berlin, Germany, 23/07/2019. https://doi.org/10.1109/EMBC.2019.8857549

TY - GEN

T1 - Assessing tDCS Placebo Effects on EEG and Cognitive Tasks

AU - Petersen, Tine Holmback

AU - Puthusserypady, Sadasivan

N1 - Conference code: 41

PY - 2019

Y1 - 2019

N2 - Divergent thinking (DT) using transcranial direct current stimulation (tDCS) has previously been documented with promising results. This paper examines the placebo effect of tDCS. The reaction from a placebo group was tapped using electroencephalogram (EEG). Their performance was measured as a creativity score and compared to a control group. The experiments included multiplication problems and two DT tasks: Alternative Uses Tasks (AUT) and Instances Task (IT). Neither of the groups were sham stimulated during AUT, but during IT the placebo group was sham stimulated. An automatic noise-detection algorithm was developed to remove the speech-induced EEG noise. Features of power, Welchs power spectral density (WPSD) and Welchs cross PSD (WCPSD)/frequency-band/channel were extracted and fed to the Support Vector Machine (SVM) classifiers. The χ2-test showed a significant difference (p<0.001) between the no stimulation and sham stimulation conditions when compared to the control group, confirming a placebo effect.

AB - Divergent thinking (DT) using transcranial direct current stimulation (tDCS) has previously been documented with promising results. This paper examines the placebo effect of tDCS. The reaction from a placebo group was tapped using electroencephalogram (EEG). Their performance was measured as a creativity score and compared to a control group. The experiments included multiplication problems and two DT tasks: Alternative Uses Tasks (AUT) and Instances Task (IT). Neither of the groups were sham stimulated during AUT, but during IT the placebo group was sham stimulated. An automatic noise-detection algorithm was developed to remove the speech-induced EEG noise. Features of power, Welchs power spectral density (WPSD) and Welchs cross PSD (WCPSD)/frequency-band/channel were extracted and fed to the Support Vector Machine (SVM) classifiers. The χ2-test showed a significant difference (p<0.001) between the no stimulation and sham stimulation conditions when compared to the control group, confirming a placebo effect.

U2 - 10.1109/EMBC.2019.8857549

DO - 10.1109/EMBC.2019.8857549

M3 - Article in proceedings

C2 - 31946867

SN - 978-1-5386-1311-5

SP - 4509

EP - 4512

BT - Proceedings of 2019 41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society

PB - IEEE

T2 - 41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society

Y2 - 23 July 2019 through 27 July 2019

ER -

Assessing tDCS Placebo Effects on EEG and Cognitive Tasks

Abstract

Conference

Access to Document

OpenUrl availability

Fingerprint

Cite this