The process of assessing attention deficit hyperactivity disorder (ADHD) in adults is fraught with concerns about subjectivity, as difficulties have been shown with self-reporting, both with over- and under-reporting, of symptoms. There have been some shifts to more objective measures such as infrared tracking of eye movements, computerised continuous performance tests, functional MRI and quantitative electroencephalograms (qEEGs). As these can be expensive to set up, the majority of assessments still tend to rely on self-reporting and corroborative evidence. This article will review some of the more common adult assessment frameworks in use. All of the following tools have been validated empirically and cited widely in peer-reviewed research.