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Test and Evaluation of TRUST: Tools for Recognizing Useful Signals of Trustworthiness

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Technical Report

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Space and Naval Warfare Systems Center Pacific San Diego United States

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This study focuses on the measurement of trustworthiness. The report focuses on testing, research and evaluation of a new research method for measuring and requiring trust between individuals. Not only did this study attempt to understand the holistic neural, psychophysiological, psychological, and behavioral underpinnings of the nature of trust, but more broadly, enhance understanding of the social dynamic of human interaction vital to the success of everyday life, especially in the defense and intelligence community context. The study was adapted from a well-evaluated game theory paradigm Prisoners Dilemma. The Prisoners Dilemma puts study participants in a situation where they must decide to trust or not trust an assigned partner. Their decisions and the decisions of their partners, to trust or not trust are determined by the amount of monetary compensation participants were given at the end of the experimental session. The study goal was to evaluate the extent to which particular behavioral, psychological, physiological, and neural signals are related to trust between two people. Many areas were studied for this report, including frontal alpha power asymmetry, electroencephalography EEG, high- and low-frequency and RR interval of heart rate, electrocardiography ECG, skin conductance levels and Galvanic Skin Response GSR, oxytocin and cortisol concentrations, and psychological state questionnaires. These areas were investigated using three different methodological transformations one examining raw signals, and two adjusting the signals to baseline minus baseline and divided by baseline. Applied throughout the report are six hypotheses derived from Social Exchange Model. The six hypotheses are provided in the report.

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