ICPM: Inter- and intra- observer variation in phytolith morphometry

ICPM: Inter- and intra- observer variation in phytolith morphometry

Photo of Sorghum bicolor bilobate by Welmoed Out

The International Committee on Phytolith Morphometry has published a new study on inter- and intra-observer variation in phytolith morphometry. Questions addressed include: how large is inter- and intra-observer variation, what are the causes, and how can such variation be overcome? Study findings are relevant for other fields of science that make use of morphometry. Following the guidelines of the International Committee on Open Phytolith Science (ICOPS), photos and measurements have been made available in a ZENODO repository. The study was supported by the Hugo De Vries fund, the Netherlands, and Moesgaard Museum, Denmark.

Publication: Welmoed A. Out, Rand Evett, Kristýna Hošková, Robert C. Power, Javier Ruiz-Pérez, Monica Tromp, Luc Vrydaghs, Kali Wade and Mario Hasler 2024. Inter- and intra-observer variation in phytolith morphometry. Annals of Botany mcae116. https://doi.org/10.1093/aob/mcae116.

Repository: Welmoed A. Out, Marta Dal Corso, Javier Ruiz-Pérez J, Rand Evett, Kristýna Hošková, Robert C. Power, Monica Tromp, Luc Vrydaghs, Kali Wade and Mario Hasler 2024. Supporting information for “Inter- and intra-observer variation in phytolith morphometry”. https://doi.org/10.5281/zenodo.10527430.

Video by Welmoed Out showing a compilation of masks of 24 measurements made by eight people who all measured the same phytolith three times. If all observers always measured the same, the video would show a static image.
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