Construct misspecification is deleterious in that it leads to Type I and Type II errors. In this study we empirically demonstrate that different measurement conceptualizations can lead to different conclusions concerning the relative importance of beliefs in predicting electronic service quality. Specifically we test three second-order measurement conceptualizations of the electronic service quality construct in the context of a mobile internet music service. We find that there is poor convergence between the three models highlighting the need for more careful measurement specification of IS constructs even at a higher-order hierarchical measurement level.