When publishing research data collected with use of our facial pictures database please make the following reference:

Olszanowski, M., Pochwatko, G., Kukliński, K., Ścibor-Rylski, M., Lewinski, P., Ohme, R. (2015). Warsaw set of emotional facial expression pictures: a validation study of facial display photographs. Frontiers in Psychology, 5:1516. doi: 10.3389/fpsyg.2014.01516 (download pdf: here or you can find it on Frontiers)

List of other related publications:

– Winkielman, P., Olszanowski, M., Gola, M. (2015). Faces in-between: Evaluations reflect the interplay of facial features and task-dependent fluency. Emotion 15 (2):232-242doi: 10.1037/emo0000036

– Olszanowski, M., Kaminska, O.K., Winkielman, P. (2017). Mixed matters:  Fluency impacts trust ratings when faces range on valence but not on motivational implications. Cognition & Emotion. doi: 10.1080/02699931.2017.1386622