The aim of this study was to explore parents' attributions for their children's behaviour and their beliefs about treatment efficacy, and to investigate the specific topics and strategies parents believe would be most beneficial in a parenting intervention. A survey of 165 parents and qualitative interviews with 13 parents were conducted, assessing child behaviour, parental attributions and intervention characteristics. The findings indicated that parents were confident in their ability to manage the challenges of asthma, and in general, believed that five key asthma treatment recommendations were at least moderately helpful in managing their child's asthma. Many parents believed that asthma medications were related to behavioural difficulties including hyperactivity, disruptiveness, and disobedience. Nearly half of the parents were concerned about how to best manage their child's asthma, and a number of themes were identified as important intervention elements. The implications of these findings for intervention development are discussed.