• 2005 to present: Justus-Liebig-Universität Gießen
    PhD student
    Project: Cortical mechanisms of colour vision, funded by DFG grant Ge 879/5
  • 2003-2005: Nokia Research Center
    Researcher (Small display legibility and image quality)
  • 2001-2003: Faculty of Psychology, University of Helsinki
    Teaching assistant (experimental psychology and visual perception)

  • Master of Arts (psychology) at the University of Helsinki, 2004.
    Master's thesis: Kirkkaus- ja värimekanismien vuorovaikutus pinnan kirkkauden havaitsemisessa (Interaction between luminance and colour mechanisms in the perception of surface brightness)
  • Baccalaureate at Helsingin normaalilyseo, 1998


  • Structure, Function and Development of the Visual System at the Cold Spring Harbor Laboratory, 5th - 19th July, 2007
  • European summer school 'Visual neuroscience: from spikes to awareness' in Rauischholzhausen, 3th - 15th September, 2006


  • Olkkonen, M., Hansen, T., & Gegenfurtner, K. R. (2008). Colour appearance of familiar objects: Effects of object shape, texture and illumination changes. Journal of Vision, 8 , 1-16.
  • Hansen, T., Olkkonen, M., Walter, S. & Gegenfurtner, K. R. (2006). Memory modulates color appearance. Nature Neuroscience, 9, 1367-1368.
  • Olkkonen, M., Hansen, T. and Gegenfurtner, K. R. (2007).  Memory color effects on color appearance under varying illumination. [Abstract]. Journal of Vision, 7(9):460, 460a, http://journalofvision.org/7/9/460/.
  • Olkkonen, M., Hansen, T. and Gegenfurtner, K. R. (2006). Investigating memory colours of natural objects: A new method of chromatic adjustment. Perception, 35s, 194.
  • Olkkonen, M., Hansen, T. and Gegenfurtner, K. R. (2006). Color constancy for natural objects using polar chromatic adjustment. Poster presented at the 9th Tübingen Wahrnehmungskonferenz, 3.-5.3.2006.
  • Olkkonen, M. and Mustonen, T. (2004) Walking-caused vibration and small display legibility. Proceedings of the 2004 International Display Workshops.
  • Mustonen, T. Olkkonen, M. and Häkkinen, J. (2004) Examining mobile phone text legibility while walking. Extended abstracts of the 2004 Conference on Human factors in Computing Systems, pp. 1243-1246. New York: ACM Press.
  • Olkkonen, K.M., Saarela, T.P., Peromaa, T.L. and Laurinen, P.I (2002). Effects of chromatic contrast on brightness perception. Perception, 31s, 184-185.