Ancestry Distant Cousin Threshold

As you scroll down the Ancestry Match List page, you’ll eventually see a “Distant Cousin” marker. This is the Ancestry Distant Cousin Threshold. Matches above the mark are what Ancestry calls 4th-6th cousins (and closer). Matches below the mark are what they consider to be “Distant Cousins”. The Ancestry Distant Cousin threshold is 20 centimorgans. … Read more Ancestry Distant Cousin Threshold

Strengthening Security

dataminingdna.com is now fully secure! I purchased an SSL certificate from my hosting provider, and used the WordPress plugin “Really Simple SSL” to install it on this website. The free plugin provided a painless process for the setup. If I ever need the additional features of the premium product, I’ll happily stick with this company.

Ancestry display issues – is your ad-blocker leading to a problem?

Here’s a tip on avoiding a particular display issue with Ancestry when using Chrome. The problem of the spinning wheel started occurring for me in October. The little wheel kept spinning, and the page of match lists would not scroll and display properly. I followed the usual Ancestry instructions to clear down cache to no … Read more Ancestry display issues – is your ad-blocker leading to a problem?

Another new Ancestry feature – CMs on the Match List Page

As of late October 2018, Ancestry have released another new display feature on the Match List page: a┬árow below each match displays the number of shared centimorgans and segments. This should be a real time saver when reviewing matches by scanning the page. In combination with the other new feature I posted about, the “no … Read more Another new Ancestry feature – CMs on the Match List Page

Ancestry’s new feature on the Match List Page – More Tree Info

Ancestry added a very useful new feature to the main list of matches at some time in September/October 2018. I’m being vague on the timeline because not all Ancestry users get the same new features at the same time. We now see a new tree description toward the right hand side of the page: “Unlinked … Read more Ancestry’s new feature on the Match List Page – More Tree Info

How many of my Ancestry Matches have added or removed Trees in the Last 3 Months?

I conducted a review in May 2018 of all my DNA matches on Ancestry and recorded whether the match had a public or private tree, and whether a tree was linked to their DNA. I ran the same review three months later in August 2018, having seen an additional 15 hundred matches added during that … Read more How many of my Ancestry Matches have added or removed Trees in the Last 3 Months?

August 2018 Analysis of Growth of Matches on AncestryDNA

This post follows on from my May 2018 analysis of the rate of growth of my DNA matches on Ancestry between July 2017 and May 2018. I took another snapshot of all my DNA matches in August 2018. I’m interested in capturing: THE RATE OF GROWTH OF MATCHES THE DISTRIBUTION OF MATCHES BY SHARED CM … Read more August 2018 Analysis of Growth of Matches on AncestryDNA

Measuring Genealogical Similarity using the Jaccard Index

For some of the posts on this blog I’ll be using one way to measure the similarity of two sample sets of data. The statistic is called the Jaccard Index, or the Jaccard Similarity Coefficient. This post is a technical explanation of the calculation itself. The sets of data are the unique ancestral surnames of … Read more Measuring Genealogical Similarity using the Jaccard Index