LAUSR

This article comparatively analyzes two manifestos in the field of quantitative science evaluation, the Altmetrics Manifesto (AM) and the Leiden Manifesto (LM). It employs perspectives from the Sociology of (E-) Valuation to make sense of highly visible critiques that organize the current discourse. Four motifs can be reconstructed from the manifestos’ valuation strategies. The AM criticizes the confinedness of established evaluation practices and pledges for an expansion of quantitative research evaluation. The LM denounces the proliferation of ill-applied research metrics and calls for an enclosure of metric research assessment. It can be shown that these motifs are organized diametrically: The two manifestos represent opposed positions in a critical discourse on (e-) valuative metrics. They manifest quantitative science evaluation as a contested field.