Electronic Word-of-Mouth and Trust

A study by Fan and Miao (National Central University Taiwan) explores the trustworthiness of Electronic Word-of-Mouth:
http://ijebm.ie.nthu.edu.tw/IJEBM_Web/IJEBM_static/Paper-V10_N3/A01.pdf

Photos of Faces and Trustworthiness

A study by Bryan, Perona and Adolphs (California Institute of Technology) has shown that the distance from which faces are photographed can influence perceived trustworthiness:
http://www.plosone.org/article/info:doi%2F10.1371%2Fjournal.pone.0045301

Communication Competence and Trust in Leaders

A study by Yoshida (Lehigh University) discusses links between communication competence and trust in leaders:
http://gradworks.umi.com/34/78/3478553.html

Trustworthy Information on Twitter

A study by the Carnegie Mellon University explores the trustworthiness of information on Twitter:
http://dl.acm.org/citation.cfm?id=2145274