This summer fellowship will accept proposals interested in basic research to understand and empirically study the biopsychosocial mechanisms underlying trust, influence, cognitive security, teaming with machine intelligence, sociotechnical system modeling, and related topics. Examples of broadly-relevant topics include assessing and improving the false positive rate of relevant research programs. More specific topics could include explaining the neurocognitive and sociocultural mechanisms that enable and constrain social interaction; and engineering socio-technical systems that enhance cognitive security. Researchers with demonstrated skills in neuroimaging data analysis, computational social science, mathematical modeling, statistical analysis, theory construction, or philosophy of science are especially encouraged to apply. In emerging areas such as cognitive security, a wider range of proposals will be considered.