[1] This thesis is an original work by Maria Wong. [2] Portions of Chapter Two have been published as M. Wong, “Eye Oscillations When Attending to Multi-Coloured Stimuli in Children with ADHD,” Journal of Scientific Affairs, vol. 135, issue 2, 96-98. [3] The research projects that make up this thesis received approval by the University of British Columbia’s Research Ethics Board on March 5th, 2010. [4] Chapter Four of this thesis is based on my study, conducted in 2011 with co-researchers Albert Sanchez and Sandy Lu, entitled “Eye Movement Patterns in Teenagers with ADHD.” The eye-movement tracking device described in Chapter Five was designed in partnership with Dr. Laura McLeod. 1. Depending on your university’s guidelines, you may need to state that this thesis is an original work. 2. Indicate whether or not you have previously published parts of the thesis and, if so, where and when. 3. If applicable, mention your research study’s research ethics board approval. 4. Briefly acknowledge key people who collaborated with you on the research that makes up your thesis, such as co-authors on studies.