The construct validity of theh-index

Abstract

PurposeThe purpose of this paper is to show how bibliometrics would benefit from a stronger programme of construct validity.Design/methodology/approachThe value of the construct validity concept is demonstrated by applying this approach to the evaluation of theh-index, a widely used metric.FindingsThe paper demonstrates that theh-index comprehensively fails any test of construct validity. In simple terms, the metric does not measure what it purports to measure. This conclusion suggests that the current popularity of theh-index as a topic for bibliometric research represents wasted effort, which might have been avoided if researchers had adopted the approach suggested in this paper.Research limitations/implicationsThis study is based on the analysis of a single bibliometric concept.Practical implicationsThe conclusion that theh-index fails any test in terms of construct validity implies that the widespread use of this metric within the higher education sector as a management tool represents poor practice, and almost certainly results in the misallocation of resources.Social implicationsThis paper suggests that the current enthusiasm for theh-index within the higher education sector is misplaced. The implication is that universities, grant funding bodies and faculty administrators should abandon the use of theh-index as a management tool. Such a change would have a significant effect on current hiring, promotion and tenure practices within the sector, as well as current attitudes towards the measurement of academic performance.Originality/valueThe originality of the paper lies in the systematic application of the concept of construct validity to bibliometric enquiry.