Spatial Presence and Emotions during Video Game Playing: Does It Matter with Whom You Play? - Niklas Ravaja; Timo Saari; Marko Turpeinen; Jari Laarni; Mikko Salminen; J. Matias Kivikangas (Presence Teleoperators Virtual Environ., 2006)

Suboptimal Affective Primes in Video Messages. - J. Matias Kivikangas; Niklas Ravaja (J. Media Psychol. Theor. Methods Appl., 2009)

Developing a triangulation system for digital game events, observational video, and psychophysiological data to study emotional responses to a virtual character. - J. Matias Kivikangas; Lennart E. Nacke; Niklas Ravaja (Entertain. Comput., 2011)

Digital games as experiment stimulus. - Simo Järvelä; Inger Ekman; J. Matias Kivikangas; Niklas Ravaja (Nordic DiGRA, 2012)

Physiological compliance for social gaming analysis: Cooperative versus competitive play. - Guillaume Chanel; J. Matias Kivikangas; Niklas Ravaja (Interact. Comput., 2012)

Emotional Responses to Victory and Defeat as a Function of Opponent. - J. Matias Kivikangas; Niklas Ravaja (IEEE Trans. Affect. Comput., 2013)

A Practical Guide to Using Digital Games as an Experiment Stimulus. - Simo Järvelä; Inger Ekman; J. Matias Kivikangas; Niklas Ravaja (Trans. Digit. Games Res. Assoc., 2014)

Why do players buy in-game content? An empirical study on concrete purchase motivations. - Juho Hamari; Kati Alha; Simo Järvelä; J. Matias Kivikangas; Jonna Koivisto; Janne Paavilainen (Comput. Hum. Behav., 2017)

Neural Network Based Facial Expression Analysis of GameEvents: A Cautionary Tale. - Shaghayegh Roohi; Jari Takatalo; J. Matias Kivikangas; Perttu Hämäläinen (CHI PLAY, 2018)

Effects of many conflicting objectives on decision-makers' cognitive burden and decision consistency. - J. Matias Kivikangas; Eeva Vilkkumaa; Julian Blank; Ville J. Harjunen; Pekka Malo; Kalyanmoy Deb; Niklas Ravaja; Jyrki Wallenius (Eur. J. Oper. Res., 2025)