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Regulation of Craving in Internet Gamers

17. Dezember 2018 aktualisiert von: jintao, zhang, Beijing Normal University

Regulation of Craving in Internet Gamers: Neural Mechanisms and tDCS Intervention

This project aims to investigate (1) the behavioral and neural mechanisms of regulation of craving in Internet gamers; (2) effects of tDCS over the dorsal lateral prefrontal cortex (dlPFC) on craving and regulation of craving and aversive emotions in this population. (3) effects of tDCS over dlPFC on attentional bias towards gaming related cues.This project will be conducted in Beijing, China, based on a large sample of Internet gamers.

Studienübersicht

Status

Abgeschlossen

Bedingungen

Intervention / Behandlung

Detaillierte Beschreibung

As with the experiment about tDCS effects on regulation of craving and aversive emotions, the experiment aims to test whether tDCS over dlPFC will enhance cognitive regulation of craving and aversive emotions. It is a within-subject, sham-controlled, double-blind design. Each participant receive both active and sham tDCS of dlPFC in a randomized order separated by one week. During both active and sham tDCS sessions, participants will perform regulation of craving (ROC) and emotion regulation (ER) tasks. In the ROC task, participants will be asked to downregulate and upregulate craving elicited by gaming pictures using cognitive reappraisal. In the ER task, participants will be asked to downregulate and upregulate aversive feelings elicited by negative pictures using cognitive reappraisal. During these tasks, self-report ratings and skin conductance responses (SCRs) will be recorded. The cognitive regulation ability is indexed by rating and SCRs differences between the up- and downregulation conditions.

As with the experiment about tDCS effects on attentional bias, the experiment aims to test whether tDCS over dlPFC will enhance inhibitory control of attentional bias towards gaming related cues. The inhibitory control of attentional bias will be measured by a cognitive task in which participants will perform a number classification task with gaming pictures and non-gaming pictures being distractors. The experiment is a within-subject, sham-controlled, double-blind design. Each participant will receive both active and sham tDCS of dlPFC in a randomized order separated by one week. After each tDCS session, participants will complete the cognitive task assessing inhibitory control of attentional bias. During the task, reaction times (RTs) wil be recorded. The attentional bias is indexed by RTs differences between trials with gaming pictures and trials with non-gaming pictures.

Studientyp

Interventionell

Einschreibung (Tatsächlich)

20

Phase

  • Unzutreffend

Kontakte und Standorte

Dieser Abschnitt enthält die Kontaktdaten derjenigen, die die Studie durchführen, und Informationen darüber, wo diese Studie durchgeführt wird.

Studienorte

  • China
    • Beijing
      • Beijing, Beijing, China, 100875
        • State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University

Teilnahmekriterien

Forscher suchen nach Personen, die einer bestimmten Beschreibung entsprechen, die als Auswahlkriterien bezeichnet werden. Einige Beispiele für diese Kriterien sind der allgemeine Gesundheitszustand einer Person oder frühere Behandlungen.

Zulassungskriterien

Studienberechtigtes Alter

18 Jahre bis 30 Jahre (Erwachsene)

Akzeptiert gesunde Freiwillige

Ja

Studienberechtigte Geschlechter

Alle

Beschreibung

Inclusion Criteria:

  • engagement in a popular Internet game (Arena of Valor) for over 14 hours per week for a minimum of 6 months.

Exclusion Criteria:

  • current or history of use of illegal substances and gambling;
  • current or history of psychiatric or neurological illness;
  • current use of psychotropic medications.

Studienplan

Dieser Abschnitt enthält Einzelheiten zum Studienplan, einschließlich des Studiendesigns und der Messung der Studieninhalte.

Wie ist die Studie aufgebaut?

Designdetails

  • Hauptzweck: Grundlegende Wissenschaft
  • Zuteilung: Zufällig
  • Interventionsmodell: Crossover-Aufgabe
  • Maskierung: Doppelt

Waffen und Interventionen

Teilnehmergruppe / Arm
Intervention / Behandlung
Experimental: active tDCS on the dlPFC
tDCS on the DLPFC Dorsolateral prefrontal cortex (DLPFC) target will be identified by the baseline functional magnetic resonance imaging (fMRI) study for regulation of craving using a separate sample. During the intervention, each participant will receive an active transcranial direct current stimulation (tDCS) intervention on this DLPFC region (1.5 mA for 20 minutes).
Sonstiges: active tDCS on the dlPFC
During active tDCS session, participants will perform the regulation of craving (ROC) and emotion regulation (ER) tasks. In the ROC task, participants will downregulate and upregulate craving elicited by gaming pictures using cognitive reappraisal. In the ER task, participants will downregulate and upregulate aversive feelings by negative pictures using cognitive reappraisal. After the active tDCS session, participants will complete a cognitive task assessing inhibitory control of attentional bias, in which participants will perform a number classification task with gaming pictures and non-gaming pictures being distractors. During the task, reaction times (RTs) wil be recorded.
Andere Namen:
  • tDCS
Schein-Komparator: sham tDCS on the dlPFC
Each participant will also receive a sham tDCS intervention as a controlled condition. The sham tDCS only include a 30-s ramp up and a 30-s ramp down.
Sonstiges: sham tDCS on the dlPFC
During the sham tDCS session, participants will perform the regulation of craving (ROC) and emotion regulation (ER) tasks. In the ROC task, participants will downregulate and upregulate craving elicited by gaming pictures using cognitive reappraisal. In the ER task, participants will downregulate and upregulate aversive feelings by negative pictures using cognitive reappraisal. After the sham tDCS session, participants will complete a cognitive task assessing inhibitory control of attentional bias, in which participants will perform a number classification task with gaming pictures and non-gaming pictures being distractors. During the task, reaction times (RTs) wil be recorded.
Andere Namen:
  • tDCS

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Craving in the regulation of craving (ROC) task after the initiation of active and sham tDCS
Zeitfenster: 4 minutes after the initiation of active and sham tDCS for half of the participants
Using the Visual Analog Scale (from 1 = 'not at all' to 9 = 'very much'), craving is assessed in the ROC task. This task lasts 12-13 minutes. Craving in the downregulation condition will be compared between the active and sham tDCS. Craving in the upregulation condition will also be compared between the active and sham tDCS.
4 minutes after the initiation of active and sham tDCS for half of the participants
Aversive feeling in the emotion regulation (ER) task after the initiation of active and sham tDCS
Zeitfenster: 16-17 minutes after the initiation of active and sham tDCS
Using the Visual Analog Scale (from 1 = 'not at all' to 9 = 'very much'), aversive feeling is assessed in the ER task. This task lasts 12-13 minutes. Aversive feeling in the downregulation condition will be compared between the active and sham tDCS. Aversive feeling in the upregulation condition will also be compared between the active and sham tDCS.
16-17 minutes after the initiation of active and sham tDCS
Reaction times (RTs) in the cognitive task assessing inhibition of attentional bias after the initiation of active and sham tDCS
Zeitfenster: 45-47 minutes after the initiation of of active and sham tDCS
Using the E-prime software, RTs are recorded in milliseconds in the cognitive task assessing inhibition of attentional bias. The cognitive task lasts 5-6 minutes. RTs difference between the trials including gaming pictures and those including gaming pictures will be calculated and such RTs difference will be compared between the active and sham tDCS.
45-47 minutes after the initiation of of active and sham tDCS

Sekundäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Skin conductance responses (SCRs) in the ROC task after the initiation of active and sham tDCS
Zeitfenster: 4 minutes after the initiation of active and sham tDCS
Using a biosignal recorder, SCRs are recorded in μs in the ROC task. This task lasts 12-13 minutes. SCRs in the downregulation condition will be compared between the active and sham tDCS. SCRs in the upregulation condition will also be compared between the active and sham tDCS.
4 minutes after the initiation of active and sham tDCS
Skin conductance responses (SCRs) in the ER task after the initiation of active and sham tDCS
Zeitfenster: 16-17 minutes after the initiation of active and sham tDCS ham tDCS
Using a biosignal recorder, SCRs are recorded in μs in the ER task. This task lasts 12-13 minutes. SCRs in the downregulation condition will be compared between the active and sham tDCS. SCRs in the upregulation condition will also be compared between the active and sham tDCS.
16-17 minutes after the initiation of active and sham tDCS ham tDCS
Background craving before the initiation of active and sham tDCS
Zeitfenster: Approximately 10 minutes before the initiation of active and sham tDCS
Using the Visual Analog Scale (from 1 = 'not at all' to 9 = 'very much'), background craving is assessed with a one-item questionaire (how much do you crave playing internet games now?). This assessment lasts approximately 1 minute. Background craving will be compared between the active and sham tDCS.
Approximately 10 minutes before the initiation of active and sham tDCS
Cue-induced craving before the initiation of active and sham tDCS
Zeitfenster: Approximately 8 minutes before the initiation of active and sham tDCS
Using the Visual Analog Scale (from 1 = 'not at all' to 9 = 'very much'), cue-induced craving is assessed in a cue-reactivity task. This assessment lasts 1-2 minutes. Cue-induced craving will be compared between the active and sham tDCS.
Approximately 8 minutes before the initiation of active and sham tDCS
Background craving after the initiation of active and sham tDCS
Zeitfenster: 38-40 minutes after the the initiation of active and sham tDCS
Using the Visual Analog Scale (from 1 = 'not at all' to 9 = 'very much'), background craving is assessed with a one-item questionaire (how much do you crave playing internet games now?). This assessment lasts approximately 1 minute. Background craving will be compared between the active and sham tDCS.
38-40 minutes after the the initiation of active and sham tDCS
Cue-induced craving after the initiation of active and sham tDCS
Zeitfenster: 40-42 minutes after the the initiation of active and sham tDCS
Using the Visual Analog Scale (from 1 = 'not at all' to 9 = 'very much'), cue-induced craving is assessed in a cue-reactivity task. This assessment lasts 1-2 minutes. Cue-induced craving will be compared between the active and sham tDCS.
40-42 minutes after the the initiation of active and sham tDCS

Mitarbeiter und Ermittler

Hier finden Sie Personen und Organisationen, die an dieser Studie beteiligt sind.

Sponsor

Beijing Normal University

Ermittler

  • Hauptermittler: Jin-Tao Zhang, Phd, Beijing Normal University

Publikationen und hilfreiche Links

Die Bereitstellung dieser Publikationen erfolgt freiwillig durch die für die Eingabe von Informationen über die Studie verantwortliche Person. Diese können sich auf alles beziehen, was mit dem Studium zu tun hat.

Allgemeine Veröffentlichungen

Studienaufzeichnungsdaten

Diese Daten verfolgen den Fortschritt der Übermittlung von Studienaufzeichnungen und zusammenfassenden Ergebnissen an ClinicalTrials.gov. Studienaufzeichnungen und gemeldete Ergebnisse werden von der National Library of Medicine (NLM) überprüft, um sicherzustellen, dass sie bestimmten Qualitätskontrollstandards entsprechen, bevor sie auf der öffentlichen Website veröffentlicht werden.

Haupttermine studieren

Studienbeginn (Tatsächlich)

20. Juli 2018

Primärer Abschluss (Tatsächlich)

15. September 2018

Studienabschluss (Tatsächlich)

20. Oktober 2018

Studienanmeldedaten

Zuerst eingereicht

13. November 2017

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

20. November 2017

Zuerst gepostet (Tatsächlich)

24. November 2017

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Tatsächlich)

19. Dezember 2018

Letztes eingereichtes Update, das die QC-Kriterien erfüllt

17. Dezember 2018

Zuletzt verifiziert

1. Dezember 2018

Mehr Informationen

Begriffe im Zusammenhang mit dieser Studie

Zusätzliche relevante MeSH-Bedingungen

Andere Studien-ID-Nummern

  • IGDROC

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UNENTSCHIEDEN

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Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt

Nein

Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt

Nein

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