Radiocarbon dating calibration oxcal
The first volume of the journal (a word coined by Christopher Hawkes) was published in 1958, originally subtitled the ‘Bulletin of the Research Laboratory for Archaeology and the History of Art, Oxford University’, but including international contributions from volume 3 onwards.
This is still published for Oxford University by Wiley-Blackwell.
I wrote that in my view Bronk Ramsey had followed a defensible approach (since his results flow from applying Bayes’ theorem using that prior), so there was no research misconduct involved, but that his method did not represent best scientific inference.
The final outcome was that Doug accepted what Radford and Nullius said about how the sample measurement should be interpreted as probability, with the implication that his criticism of the calibration method is invalid.
It is also preferable to a method for which those percentages were both 3%, which would imply the uncertainty ranges were unnecessarily wide.
If the true value of the parameter lies below the bottom end of the range in 5% of cases and above its top in 5% of cases, then that method can be said to exhibit perfect frequentist coverage or exact probability matching (at least at the 5% and 95% probability levels), and would be viewed as a more reliable method than a non-probability-matching one for which those percentages were (say) 3% and 10%.
Cal Pal-Online is developed to give a quick reference.
For more detailed results, graphical output and different 14C calibration methods, download and use Cal Pal-Beyond the Ghost.
In other words, when estimating the value of a fixed but unknown parameter, does the true value lie outside the specified uncertainty range in the indicated proportion of cases?
This so-called frequentist coverage or probability-matching property can be tested by drawing samples at random from the relevant uncertainty distributions.How to use Cal Pal Online: Enter a date above and click "Calibrate".Dates between 50.000 and 1 BP will be calibrated using the calibration curve Cal Pal2007_HULU.They took issue with Doug’s claims that the statistical methods and resulting probability densities (PDFs) and probability ranges given by Ox Cal and Calib are wrong.