This study explored the problem of under-achievement in Hong Kong. Underachievers were compared with high achievers and low achievers on their motivational characteristics. The findings generally supported that motivational variables were important factors in discriminating under-achievers and high achievers. While under-achievers had poor academic self-concept, low attainment value in learning, and deficiencies in using effective learning strategies, they did not demonstrate maladaptive attributional pattern as described in Western studies. Implications of these findings for the study of under-achievement and implementation of interventions are discussed. [Copyright of Educational Psychology is the property of Routledge. Full article may be available at the publisher's website: http://dx.doi.org/10.1080/01443410120090803]