Background This study examines the importance of staff judgements of responsibility for challenging behaviour in predicting their emotional and intended helping responses. Methods Sixty-two carers completed questionnaires rating attributions of internality, stability and controllability, emotions of sympathy and anger, judgements of responsibility for the development of challenging behaviour and for its resolution and intended effort in helping in response to a scenario describing an aggressive behaviour. Results Results showed significant correlations between judgements of responsibility and attributions, emotions and intended effort in helping. Regression analysis showed that the best predictor of intended helping is the emotion of sympathy and that sympathy is best predicted by the attribution of internality, the judgement that people are not responsible for the development of challenging behaviour and the judgement that they are responsible for the resolution of the behaviour. Conclusions Judgements of responsibility predict emotional and intended behavioural responses of carers of people with intellectual disabilities and challenging behaviour. The results are discussed in relation to previous work on carer attributions in response to challenging behaviour. Implications for clinical work with carers are considered.