Indexing hint: Clinical trial · 2005
Oxytocin increases trust in humans.
Kosfeld et al. 2005Naturecited by 1,701
PMID 15931222DOI 10.1038/nature03701PUB-15931222
Trial · Interventional
Status unknownNot applicableRegistry dataIsrael
1 trial
Effects of Intranasal Oxytocin and Vasopressin on Social Behavior and Decision Making
NCT02526914Oct 2015 to est. Oct 2017
Text and fields below are the sponsor's entries at ClinicalTrials.gov, shown as posted.
The purpose of this study is to investigate the role of a one-time intranasal administration of the oxytocin, vasopressin, or placebo on prosocial decision making such as cooperation and competition in a healthy population of student controls.
Experimental
Intranasal Oxytocin
Participants will self-administer 24 IU Oxytocin. 5 puffs per nostril (1 puff = 2.5 IU Oxytocin).
Experimental
Intranasal vasopressin
Participants will self-administer 20 IU vasopressin. 5 puffs per nostril (1 puff = 2 IU vasopressin).
Placebo comparator
Intranasal placebo
contains all the ingredients as in the oxytocin and vasopressin conditions, save for the active ingredient. Participants will self-administer 5 puffs per nostril.
Outcomes the sponsor listed as primary.
Preferences for competitive vs cooperative compensations and monetary allocations as measured by participants monetary allocations and compensation choice
Time frame · approximately 45 minutes after intranasal administration of vasopressin, oxytocin, or placebo
A group analysis will compare compensations preference (competitive vs. noncompetitive), performance and outcomes and monetary allocations on several economic games between the oxytocin, vasopressin and placebo groups.
Redistribution preferences as measured by participants' tax rate determination
Time frame · approximately 45 minutes after intranasal administration of vasopressin, oxytocin, or placebo
Participants will choose redistribution of monetary units by determined tax rate (high vs. low). Each participant gets a different amount of monetary units (ranging from 10 to 150). Using a mixed 2 (above vs. below group mean of monetary units) x 3 (oxytocin, vasopressin, placebo) factorial design, comparisons of these tax rate preference will then be made for those in the oxytocin vs. vasopressin vs. placebo groups. Main effects of drug condition (oxytocin, vasopressin, placebo) and monetary condition (above, below group mean), as well as an interaction between drug condition and monetary condition will be analyzed at a significance level of p\<.05.
Willingness to compete as measured by participants compensation choice.
Time frame · approximately 45 minutes after intranasal administration of vasopressin, oxytocin, or placebo
Willingness to compete will be measured by participants' preference whether to compete against other participant for a monetary payment or to get a smaller payment for their non-competitive piece rate performance on maze solving task. We will analyses performance and payment preference (competitive vs. noncompetitive) between oxytocin, vasopressin and placebo at a significance level of p\<.05.
Monetary offers in public goods game
Time frame · approximately 45 minutes after intranasal administration of vasopressin, oxytocin, or placebo
Participants in two rival teams will offer monetary units for the right to take part in a lottery (higher team's offer = higher odds to win). Members of each team may, for a monetary cost, impose a tax on their team members. We will compare monetary offers and taxes' impose pattern between oxytocin, vasopressin and placebo groups at a significance level of p\<.05 .
Bargaining performance as assessed by participants' earnings in bargaining compensation
Time frame · approximately 45 minutes after intranasal administration of vasopressin, oxytocin, or placebo
Analysis will compare negotiation outcomes, in terms of monetary units earnings between oxytocin, vasopressin and placebo groups at a significance level of p\<.05.
Monetary offers in all pay auction
Time frame · approximately 45 minutes after intranasal administration of vasopressin, oxytocin, or placebo
Analysis will compare participants' monetary offers in multi-participants all-pay auction between oxytocin, vasopressin and placebo groups at a significance level of p\<.05.
Negative hypothesis test strategy usage on Wason's-rule-discovery-task after exposure to trustworthy/untrustworthy face
Time frame · approximately 45 minutes after intranasal administration of vasopressin, oxytocin, or placebo
Number of positive hypothesis tests (compare to 'negative-test') out of 6 participants' generated tests. Analysis will compare number of positive tests (vs. negative tests) between oxytocin, vasopressin and placebo groups at a significance level of p\<.05.
Positive and negative affect scale (PANAS)
Time frame · approximately one hour and fifteen minutes after administration of oxytocin, vasopressin or placebo
Using the Positive and negative affect scale (PANAS) we will measure participants emotional reaction to Oxytocin, vasopressin and placebo. Participants will report their current mood by rate the level they feel 20 different emotions at the moment on a the PANAS scale, ranging from 1 (not at all) to 5 (very much).
Fear of negative evaluation (FNE) as measured by self reporting
Time frame · approximately one hour and fifteen minutes after administration of oxytocin, vasopressin or placebo
Participants will report their fear of evaluation by rate how much 12 statements characterize them. participants will use a scale ranging from 1 ("Not at all characteristic me") to 5 ("Extremely characteristic of me").
Social value orientation as measured by monetary allocations preferences
Time frame · approximately one hour and fifteen minutes after administration of oxytocin, vasopressin or placebo
Participants will make decisions regarding the allocation of monetary units between themselves and other participants. We will measure the quantity of monetary units kept for themselves vs. given to other participants.
Values are shown as posted at ClinicalTrials.gov, with their units. PepBank has not converted, pooled or compared them.
No results are posted for this trial.
A trial that is still running, or that stopped early, may post results later.
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Studies that cite this trial.
1 study on this page
Indexing hint: Clinical trial · 2005
Kosfeld et al. 2005Naturecited by 1,701
PMID 15931222DOI 10.1038/nature03701PUB-15931222
2 studies on this page
Indexing hint: Review · 2013
Veening et al. 2013Neuroscience and biobehavioral reviewscited by 140
PMID 23648680PMC7112651DOI 10.1016/j.neubiorev.2013.04.012PUB-23648680
Indexing hint: Review · 2011
Meyer-Lindenberg et al. 2011Nature reviews. Neurosciencecited by 1,262
PMID 21852800DOI 10.1038/nrn3044PUB-21852800
Who could join, as posted.
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