Show 10 5 10 15 20 50 100 250 Sort by year (new to old) Actions News feed Embed this list Save this search Mark all Export Your filters: cql: author="Johnson, K.A." or (type exact bookEditor and editor="Johnson, K.A.") Mark journalArticle A1 What would Karl Popper say? Are current psychological theories of ADHD falsifiable? K.A. Johnson, Roeljan Wiersema (UGent) and J. Kuntsi (2009) BEHAVIORAL AND BRAIN FUNCTIONS. 5.