Saturday, May 7, 2016

AncestryDNA changes

Ancestry.com has made significant changes to its algorithms for matching. This link will take you to an excellent review of these changes and what they mean for all of us who have done or will do autosomal DNA testing with them.

The overall experience of current users is positive, although most of us recognize that no matching algorithm is perfect. There will always be some degree of false positive and false negative calls. Each company -- 23andMe, Ancestry and FamilyTreeDNA -- has its own proprietary system for matching. As always, it is wise to upload one's raw results from any ofthese three companies to GedMatch.com where you can manipulate threshholds to evaluate different settings, matches and probabilities.

No comments: