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Your search keyword '"Valtakari, Niilo V."' showing total 14 results
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14 results on '"Valtakari, Niilo V."'

5. A new look at parent-infant interaction

Author

Sub Social and Affective Computing, Faculteit Sociale Wetenschappen, Kemner, Chantal, Hessels, Roy, Hooge, Ignace, Valtakari, Niilo V., Sub Social and Affective Computing, Faculteit Sociale Wetenschappen, Kemner, Chantal, Hessels, Roy, Hooge, Ignace, and Valtakari, Niilo V.

Published
2024

6. A field test of computer-vision-based gaze estimation in psychology

Author

Sub Social and Affective Computing, Leerstoel Kemner, Helmholtz Institute, Experimental Psychology (onderzoeksprogramma PF), Leerstoel Kenemans, Valtakari, Niilo V., Hessels, Roy S., Niehorster, Diederick C., Viktorsson, Charlotte, Nyström, Pär, Falck-Ytter, Terje, Kemner, Chantal, Hooge, Ignace T.C., Sub Social and Affective Computing, Leerstoel Kemner, Helmholtz Institute, Experimental Psychology (onderzoeksprogramma PF), Leerstoel Kenemans, Valtakari, Niilo V., Hessels, Roy S., Niehorster, Diederick C., Viktorsson, Charlotte, Nyström, Pär, Falck-Ytter, Terje, Kemner, Chantal, and Hooge, Ignace T.C.

Published
2024

8. A field test of computer-vision-based gaze estimation in psychology

Author

Valtakari, Niilo V., Hessels, Roy S., Niehorster, Diederick C., Viktorsson, Charlotte, Nyström, Pär, Falck-Ytter, Terje, Kemner, Chantal, Hooge, Ignace T. C., Valtakari, Niilo V., Hessels, Roy S., Niehorster, Diederick C., Viktorsson, Charlotte, Nyström, Pär, Falck-Ytter, Terje, Kemner, Chantal, and Hooge, Ignace T. C.

Abstract

Computer-vision-based gaze estimation refers to techniques that estimate gaze direction directly from video recordings of the eyes or face without the need for an eye tracker. Although many such methods exist, their validation is often found in the technical literature (e.g., computer science conference papers). We aimed to (1) identify which computer-vision-based gaze estimation methods are usable by the average researcher in fields such as psychology or education, and (2) evaluate these methods. We searched for methods that do not require calibration and have clear documentation. Two toolkits, OpenFace and OpenGaze, were found to fulfill these criteria. First, we present an experiment where adult participants fixated on nine stimulus points on a computer screen. We filmed their face with a camera and processed the recorded videos with OpenFace and OpenGaze. We conclude that OpenGaze is accurate and precise enough to be used in screen-based experiments with stimuli separated by at least 11 degrees of gaze angle. OpenFace was not sufficiently accurate for such situations but can potentially be used in sparser environments. We then examined whether OpenFace could be used with horizontally separated stimuli in a sparse environment with infant participants. We compared dwell measures based on OpenFace estimates to the same measures based on manual coding. We conclude that OpenFace gaze estimates may potentially be used with measures such as relative total dwell time to sparse, horizontally separated areas of interest, but should not be used to draw conclusions about measures such as dwell duration.

Published
2023
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9. Eye contact avoidance in crowds: A large wearable eye-tracking study

Author

Leerstoel Kemner, Helmholtz Institute, Experimental Psychology (onderzoeksprogramma PF), Leerstoel Postma, Leerstoel Kenemans, Hessels, Roy S., Benjamins, Jeroen S., Niehorster, Diederick C., van Doorn, Andrea J., Koenderink, Jan J., Holleman, Gijs A., de Kloe, Yentl J.R., Valtakari, Niilo V., van Hal, Sebas, Hooge, Ignace T.C., Leerstoel Kemner, Helmholtz Institute, Experimental Psychology (onderzoeksprogramma PF), Leerstoel Postma, Leerstoel Kenemans, Hessels, Roy S., Benjamins, Jeroen S., Niehorster, Diederick C., van Doorn, Andrea J., Koenderink, Jan J., Holleman, Gijs A., de Kloe, Yentl J.R., Valtakari, Niilo V., van Hal, Sebas, and Hooge, Ignace T.C.

Published
2022

10. Eye tracking in human interaction: Possibilities and limitations

Author

Leerstoel Kemner, Experimental Psychology (onderzoeksprogramma PF), Helmholtz Institute, Leerstoel Kenemans, Valtakari, Niilo V., Hooge, Ignace T.C., Viktorsson, Charlotte, Nyström, Pär, Falck-Ytter, Terje, Hessels, Roy S., Leerstoel Kemner, Experimental Psychology (onderzoeksprogramma PF), Helmholtz Institute, Leerstoel Kenemans, Valtakari, Niilo V., Hooge, Ignace T.C., Viktorsson, Charlotte, Nyström, Pär, Falck-Ytter, Terje, and Hessels, Roy S.

Published
2021

12. Eye Tracking in Human Interaction

Author

Valtakari, Niilo V., primary, Hooge, Ignace T. C., additional, Viktorsson, Charlotte, additional, Nyström, Pär, additional, Falck-Ytter, Terje, additional, and Hessels, Roy S., additional

Published
2020
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14. An eye-tracking approach to Autonomous sensory meridian response (ASMR): The physiology and nature of tingles in relation to the pupil

Author

Helmholtz Institute, Afd Psychologische functieleer, Experimental Psychology (onderzoeksprogramma PF), Leerstoel Kemner, Developmental Psychology, Leerstoel Pas, Leerstoel Postma, Social, Health & Organisational Psychology, Leerstoel Dijkerman, Valtakari, Niilo V, Hooge, Ignace T C, Benjamins, Jeroen S, Keizer, Anouk, Helmholtz Institute, Afd Psychologische functieleer, Experimental Psychology (onderzoeksprogramma PF), Leerstoel Kemner, Developmental Psychology, Leerstoel Pas, Leerstoel Postma, Social, Health & Organisational Psychology, Leerstoel Dijkerman, Valtakari, Niilo V, Hooge, Ignace T C, Benjamins, Jeroen S, and Keizer, Anouk

Published
2019

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