(Refereed article in conference proceedings (A4)) The effect of smiling pictures on perceptions of personas Authors list Joni Salminen, Soon-gyo Jung, João M. Santos, Bernard J. Jansen Publication date Tue, 01/01/2019 - 12:00 Journal Conference on User Modeling, Adaptation and Personalization Organisation Marketing https://research.utu.fi/converis/portal/detail/Publication/42073300?lang=en_GB