Below is a short overview of the research I have performed in the last 20+ years. My initial focus was on inhibitory control in schizophrenia, with an emphasis on underlying brain processes. During my PhD-project at the UMC Utrecht, I worked with functional MRI data which I analysed using MATLAB toolboxes. Later I made my own matlab scripts and functions. After my PhD project, I branched out into other fields of psychiatry such as bipolar disorder, OCD and PTSS. Also I moved away from using primarily students as healthy volunteers and began to investigate brain development ranging from childhood until old age. During my time at the University Utrecht, I started with EEG as a measure of brain function complementary to that of functional MRI. Finally, I took my first steps into the exciting world of Virtual Reality! VR is increasingly used in all sorts of fields, such as research, education, and therapy. My initial focus was on studying child behaviour in a more relevant and easier to manipulate VR environment as opposed to the standard research room with the child sitting behind a computer. Ideally, VR is combined with EEG to allow online recording of brain responses to the virtual environment.