Slop Indexa companion to the h-index

Calibration

What the numbers mean

A score without a reference population is a number without a meaning. Seventeen named researchers were scored with the default weights so the scale has real anchors: two Nobel-winning bench scientists, a cardiology trialist, two surgeon-administrators, three Great Barrington Declaration authors, a senator-elect epidemiologist, an economist, and seven social epidemiologists and sociologists of health. Sorted best to worst.

Below 0.47
Research record

Bench science, trials, and clinical or statistical work with hard endpoints. Positive median paper value.

0.47 to 0.65
Mixed record

Real empirical work pulled toward zero by highly politicized topics and political agenda, or by commentary. The 0.57 neutral line runs through this band.

Above 0.65
Commentary record

Negative median paper value; most output on highly politicized topics and political agenda, a third or more opinion.

AuthorPapersA / B / ChhₑSlop IndexPoliticizedRescuedPositive valueMedian valueTotal Slop IndexCite-weighted

PubMed-indexed papers only; citations from NIH iCite; "Politicized" is the share of papers on highly politicized topics and political agenda; "Rescued" is papers that fully / partially cleared the three rescue bars. Band colors: research below 0.47, mixed 0.47 to 0.65, commentary above 0.65.

Reading the number

00.470.570.651
researchmixedcommentary

Zero is good and one is bad, and the useful cutoff is 0.57. That number is not arbitrary: it is the score of a bibliography whose average paper has nothing to recommend it and nothing to penalize, so anything above it means the typical paper is net negative under the weights, and anything below it means the typical paper adds something. The calibration table turns that into three practical bands. Below 0.47 is a research record: bench scientists, trialists, and surgeons and statisticians with hard endpoints land here, from about 0.18 (Karikó) to 0.44. 0.47 to 0.65 is mixed: real empirical work with enough highly politicized topics and political agenda, or enough commentary, to pull the average toward zero; health economists and the senator-elect epidemiologist sit here. Above 0.65 is a commentary record: the median paper is negative, most of the output is highly politicized topics and political agenda, a third or more is opinion. Nobody on the calibration table scored above 0.84 or below 0.18, so a result outside that range deserves a second look at the author match before it is believed.

Two cautions on any single number. A short record (under about 15 papers) swings wildly on one or two papers, so quote the band rather than the decimal. And always quote the topic-neutral score beside it; the gap between the two is the size of the editorial position, and the reader is entitled to know it.

Three bands

The research band (0.18 to 0.44) is bench science, trials, and clinical or statistical research with hard endpoints. These people disagree about plenty, but their bibliographies are built the same way: mostly original data, low topic penalties, positive median paper value. Karikó's record is almost entirely mechanistic work with very high field-normalized impact and no topic penalties. Charpentier follows; her lower empirical h-index reflects that a large share of her citations go to reviews and community statements rather than to the primary papers. Oz, Makary, Kulldorff, and Gupta all have empirical shares above 70 percent and axis-1 Slop Index values near 0.1, which is to say their h-indexes are built on original work, not opinion.

The mixed band (0.47 to 0.65) is where the topic penalty begins to bite but strong design still rescues papers. Bhattacharya has the most fully rescued papers on the list, which is what quasi-experimental health economics with mortality endpoints earns. Anne Case is the instructive control: nearly two thirds of her papers are on highly politicized social-determinants topics, but her median paper value stays positive because the work is cohort and time-series analysis of death rates, and her deaths-of-despair papers carry Relative Citation Ratios in the twenties and fifties. El-Sayed lands at the boundary: more empirical than the sociologists, less rescued than the economists.

The commentary band (0.65 and up) is the social-epidemiology and critical-race literature. Every author in it has a negative median paper value, and the pattern is consistent: 68 to 97 percent of their papers are on highly politicized topics and political agenda; a third to a half of the output is commentary; and the empirical papers are mostly cross-sectional surveys with self-reported outcomes and a demographic label as the exposure. Krieger is the exception that proves the rule: a 240-paper record with 135 empirical papers and an h-index of 67, but 81 commentaries and only six papers that clear all three rescue bars. Geronimus sits near the top of this band because several of her allostatic-load papers use measured biomarkers and clear the hard-endpoint bar. Bowleg sits at the bottom because a dozen of her papers are interview and focus-group studies, which the qualitative rule places at the floor.

How to use a score

Quote three numbers, not one. The axis-1 Slop Index says whether an h-index is built on data or on opinion; for most people on this table it is low, and it rules out the lazy explanation. The politicized-topic share says what the person writes about. The Total Slop Index says how much actionable science the record adds under these weights. When the first is low and the third is high, the subject matter is the finding, and anyone quoting the score should also quote the topic-neutral score from the weights panel, because that is the number a critic will reach for first.

The scale is relative to these anchors, not to an abstract standard. A new author's score means something only when placed in this table, which is why the scoring page reports the band along with the number.