Dr. Hester Knol

Since August 2017postdoctoral researcher, Department of Applied Cognitive Psychology, Ulm University, Germany
January 2017-July 2017postdoctoral researcher, Institute of Human Movement Sciences, Aix-Marseille University, France


2016:PhD in Human Movement Sciences, Aix-Marseille University, France. Thesis: ‘Aiming for illusions: The perception of size and its influence on motor control.’
2012:Master in Rehabilitation and functional recovery, University of Groningen, The Netherlands. Master thesis: ‘The effects of gradual and sudden dynamic perturbations on locomotor adaptation and retention.’
2008:Bachelor in Human movement sciences, University of Groningen, The Netherlands. Bachelor thesis: ‘Estimating the endurance of mentally disables adults.’


Hester Knol
research assistant

☎ +49-(0)731/50-32055
℻ +49-(0)731/50 32059 
Π 43.2.216

Consultation hours
on appointment

Research projects

The human body is capable of adapting its movements to the environment in a magnificent way. In order to do that, the information from the environment needs to be picked up and acted on, and the body needs to be coordinated to respond properly. If one takes into account all the muscles and neurons that are making sure that one can lift a cup without dropping it or squeezing it, this is quite an impressive job. Hester Knol is interested in understanding how the human body adapts to changes in the environment. This incorporates the control of movements, the adaptation to visual and mechanical perturbations, the coupling between perception and action, and the integration of information. This interest has resulted in studies on the adaptation to mechanical perturbations during walking, and the influence of visual information (e.g. visual illusions) on pointing movements.

The research in the Applied Cognitive Psychology group will mainly focus on the adaptation rates in reaching movements.

Publikationen/ publications

Knol H, Sarrazin JC, Spiegler A, Huys R, Jirsa VK (2017) Ebbinghaus figures that deceive the eye do not necessarily deceive the hand. Sci. Rep. 7:3111. doi: 10.1038/s41598-017-02925-4.

Knol H, Huys R, Sarrazin JC, Jirsa VK (2015) Quantifying the Ebbinghaus figure effect: target size, context size, and target-context distance determine the presence and direction of the illusion. Front. Psychol. 6:1679. doi: 10.3389/fpsyg.2015.01679.

Huys R, Knol H, Sleimen-Malkoun R, Temprado JJ, Jirsa VK (2015) Does changing Fitts' index of difficulty evoke transitions in movement dynamics? EPJ Nonlinear Biomed. Phys. 3: 8. doi:10.1140/ epjnbp/s40366-015-0022-4.