Unilateral spatial neglect is a disorder that has, for many years, intrigued and frustrated researchers and clinicians working in the area of stroke rehabilitation. A vast literature exists on the subject of neglect, much of it published by neuropsychologists and neurologists. Many of these papers aim to identify the underlying causal mechanisms, in terms of the neuroanatomical structures and cognitive processes involved. More recently, research has focused on evaluation of rehabilitation strategies to reduce the disabling effects of neglect. Various research designs have been used to examine whether a particular approach is effective or not. These range from single-case experimental designs (where the individual acts as their own control) through to randomized controlled trials (RCTs). In the latter, comparisons are made between (typically) two groups, one randomly assigned to receive the therapy approach under investigation and the other assigned to the control treatment.