• A
  • A
  • A
  • ABC
  • ABC
  • ABC
  • А
  • А
  • А
  • А
  • А
Regular version of the site

Student
Title
Supervisor
Faculty
Educational Programme
Final Grade
Year of Graduation
Irina Morozova
A tDCS Study of Neural Mechanisms of Cognitive Dissonance
Psychology
(Bachelor’s programme)
8
2019
Cognitive dissonance is a feeling of psychological discomfort that arises when two elements of knowledge that do not correspond to each other encounter in a person’s cognitive system. Majority of the current studies of the cognitive dissonance focuses on identifying factors that affect the magnitude of dissonance. The main gap in the research of cognitive dissonance is associated with a limited number of studies of neuronal mechanisms of spreading of preferences after the choice.

The purpose of the current research was to study the role of the posterior medial frontal cortex (pMFC) in the process of cognitive dissonance by its suppression using cathodal High Definition transcranial Direct Current Stimulation (HD-tDCS).

In order to achieve this goal, the following tasks were accomplished: the theoretical foundations of cognitive dissonance were studied; the studies of the neuronal mechanisms of cognitive dissonance were analysed; the optimal localization of the electrodes to stimulate the pMFC was simulated; the HD-tDCS experiment with the inhibitory stimulation of the pMFC was conducted.

The results of this study showed that the suppression of pMFC's activity led to a decrease of cognitive dissonance after the choice, which was reflected in a decrease of spreading of preferences. Also our results suggest that the pMFC region is already involved into cognitive dissonance during the decision making process.

Currently, this study is the first study of cognitive dissonance using HD-tDCS. The results obtained confirm the involvement of the medial regions of the frontal cortex in the development of cognitive dissonance during making difficult decisions.

Student Theses at HSE must be completed in accordance with the University Rules and regulations specified by each educational programme.

Summaries of all theses must be published and made freely available on the HSE website.

The full text of a thesis can be published in open access on the HSE website only if the authoring student (copyright holder) agrees, or, if the thesis was written by a team of students, if all the co-authors (copyright holders) agree. After a thesis is published on the HSE website, it obtains the status of an online publication.

Student theses are objects of copyright and their use is subject to limitations in accordance with the Russian Federation’s law on intellectual property.

In the event that a thesis is quoted or otherwise used, reference to the author’s name and the source of quotation is required.

Search all student theses