Effects of Intranasal Oxytocin and Stress on Belief Updating
Effects of Intranasal Oxytocin and Induced Stress on People's Belief Updating
調査の概要
詳細な説明
In a randomized, double-blind, placebo controlled between-subjects design, healthy male volunteers receive intranasal oxytocin or placebo under stress or non-stress group prior belief updating task.
The Trier Social Stress Test (TSST) was used to induce psychosocial stress - this standardized technique enables a naturalistic exposure to a psychosocially stressful situation. This method consists primarily of a public speaking in second language (English) and a mental arithmetic task performed in front of a panel. Participants were not informed of the tasks prior to their recruitment. At the start of the TSST, they were told to prepare a 5-min speech to an unknown panel on personal suitability for their ideal job; the job description was matched to each participant, taking into consideration his personal aspirations. After the instructions, subjects were given 10 minutes of solitary preparation for this task. Then, they entered the TSST room and were told to start the presentation in front of a panel of two formally-dressed judges (one male and one female) and a conspicuous video camera. Any pause during the speech prompted a reminder from the judges of the remaining time. The interview was followed by 5 minutes of mental arithmetic performed out loud. Subjects were instructed to serially subtract 13 from 1022 as quickly and accurately as possible in front of the panel. If a mistake was made, the subject was told to start over from the beginning. After the mental arithmetic task, the TSST was concluded - subjects were confronted with the psychosocially stressful situation for a total of 10 minutes.
Non-stress groups first underwent a 5-minute session of travel magazine reading with two casually-dressed people (one male and one female), then did as many easy arithmetic questions within 5 minutes on paper. Participants were told that none of their answers would be marked.
All participants completed two sessions of self life event estimations, each with the same set of 40 adverse life events. The subjects were first presented with the events, then were instructed to estimate their likelihood (0-99%) of experiencing each event in the future (first Estimate, E1) and rate their confidence in their estimate. They were then presented with the actual probability of each event occurring to an average person in a similar environment (Feedback, F) and asked to rate their acceptance of the presented feedback. Five minutes after the first session, participants were instructed to perform the same task and provide their second estimate (E2) for the same 40 events in a randomized order and were, again, instructed to rate their confidence in their estimate. This time, however, no feedback was given. This process was repeated for a friend life event estimation session. After the second session, participants were given a surprise memory test for the presented feedback.
研究の種類
入学 (実際)
段階
- 適用できない
参加基準
適格基準
就学可能な年齢
健康ボランティアの受け入れ
受講資格のある性別
説明
Inclusion Criteria:
- healthy subjects without past or current psychiatric or neurological disorders
Exclusion Criteria:
- subjects with past or current psychiatric or neurological disorders
研究計画
研究はどのように設計されていますか?
デザインの詳細
- 主な目的:基礎科学
- 割り当て:ランダム化
- 介入モデル:クロスオーバー割り当て
- マスキング:ダブル
武器と介入
参加者グループ / アーム |
介入・治療 |
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実験的:Oxytocin
Oxytocin (OXT), a neuropeptide produced in the hypothalamus, is a key modulator of complex socioaffective responses including affiliation, social approach and attachment, stress and anxiety.
Subjects receiving an intranasal spray of OXT (24 IU or 40.32 mg; Syntocinon-spray; Novartis, Switzerland) .
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鼻腔内投与
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プラセボコンパレーター:Placebo
Placebo contains all ingredients except for the peptide in three puffs of 3.99 IU per 6.72mg nostril.
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intranasally administrated
他の名前:
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この研究は何を測定していますか?
主要な結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
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The updated probability estimation for negative events in the four experimental groups
時間枠:40~125 minutes after drug administration
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Using the second estimation value to minus the first estimation value to get the update value, as well as calculating the update value in desirable condition (first estimation < feedback) and undesirable condition (first estimation < feedback).
Then investigated the general belief updating (gBU) and optimistic belief updating (using desirableBU-undesirableBU) in the four experimental condition (i.e., oxytocin-stress, oxytocin-nonstress, placebo-stress, placebo-nonstress).
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40~125 minutes after drug administration
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The salivary cortisol level in four experimental groups
時間枠:40~125 minutes after drug administration
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Conducted ANOVA to test salivary cortisol level in the four experimental groups
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40~125 minutes after drug administration
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The correlation between personality traits and belief updating value in four experimental groups
時間枠:40~125 minutes after drug administration
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Conducted correlation analysis to explore which personality traits would modulate the oxytocin effect or stress effect.
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40~125 minutes after drug administration
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協力者と研究者
研究記録日
主要日程の研究
研究開始 (実際)
一次修了 (実際)
研究の完了 (実際)
試験登録日
最初に提出
QC基準を満たした最初の提出物
最初の投稿 (実際)
学習記録の更新
投稿された最後の更新 (実際)
QC基準を満たした最後の更新が送信されました
最終確認日
詳しくは
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