Study and describe the area of interaction techniques in VR. Focus on various techniques for navigation and movement, and their relation to simulation sickness. 

Design and implement a prototype of a novel interaction technique for navigation and movement of the player, involving resizing of the player's digital representation. Technique should support "common" scale and "big" scale - allowing the player to get an overview of the scene, to cover greater distances faster, or reach distant objects. 

Design and conduct a user study that will evaluate the usability of the developed technique. The study will focus on the overall user experience and also the possible correlation between the speed of resizing and motion sickness intensity. The study will use mainly standardized questionnaires, such as the Virtual Reality Sickness Questionnaire or the Visually Induced Motion Sickness Susceptibility Questionnaire.

For the user study, develop a set of virtual environments leveraging the resizing technique in different ways.