I'm not certain what you mean by filters, but 23andMe does have some different thresholds in place for regions known to have "excess" IBD. They increase the SNP and/or cM value, so if the "pile-up" is embedded in a longer segment, it will pass muster. Ann Turner On Mon, Nov 9, 2015 at 7:42 AM, Jim Bartlett via <genealogy-dna@rootsweb.com > wrote: > Andreas, > 23andMe doesn't use filters, so we see many Matches there that the 3 > DTCs > didn't post. In my experience some of them are IBD and Triangulate, but > many > don't (and go into my IBS bin) > > > > Jim Bartlett >

That's my interpretation of the word, but I don't understand why Jim Bartlett said 23andMe didn't have any filters and the 3 (?) "DTC" companies do have filters. We know about AncestryDNA's Timber, FTDNA's 20 cM filter (which seems ill-conceived) and the ability to set your own thresholds at GEDmatch. GEDmatch suffers from the need to accommodate multiple testing platforms and generates a high percentage of false positives. Ann Turner On Mon, Nov 9, 2015 at 9:29 AM, Ann Turner <dnacousins@gmail.com> wrote: > I'm not certain what you mean by filters, but 23andMe does have some > different thresholds in place for regions known to have "excess" IBD. They > increase the SNP and/or cM value, so if the "pile-up" is embedded in a > longer segment, it will pass muster. > > Ann Turner > > On Mon, Nov 9, 2015 at 7:42 AM, Jim Bartlett via < > genealogy-dna@rootsweb.com> wrote: > >> Andreas, >> 23andMe doesn't use filters, so we see many Matches there that the 3 >> DTCs >> didn't post. In my experience some of them are IBD and Triangulate, >> but many >> don't (and go into my IBS bin) >> >> >> >> Jim Bartlett >> > > >

Thanks, Ann, that's what I meant. I used "filter" as a generic term for what DTCs include in their algorithm to filter out IBS segments. Their efforts to get the highest ratio of IBD/IBS in our match list. Jim - www.segmentology.org > On Nov 9, 2015, at 12:29 PM, Ann Turner via <genealogy-dna@rootsweb.com> wrote: > > I'm not certain what you mean by filters, but 23andMe does have some > different thresholds in place for regions known to have "excess" IBD. They > increase the SNP and/or cM value, so if the "pile-up" is embedded in a > longer segment, it will pass muster. > > Ann Turner > > On Mon, Nov 9, 2015 at 7:42 AM, Jim Bartlett via <genealogy-dna@rootsweb.com >> wrote: > >> Andreas, >> 23andMe doesn't use filters, so we see many Matches there that the 3 >> DTCs >> didn't post. In my experience some of them are IBD and Triangulate, but >> many >> don't (and go into my IBS bin) >> >> >> >> Jim Bartlett >>

Filter = algorithm to improve the quality of IBD predictions. Andreas (WEST) born BASSO My ancestors: [http://www.wikitree.com/genealogy/Basso-Family- Tree-23](http://www.wikitree.com/genealogy/Basso-Family-Tree-23) "Ann Turner via" <genealogy-dna@rootsweb.com> wrote: > I'm not certain what you mean by filters, but 23andMe does have some > different thresholds in place for regions known to have "excess" IBD. They > increase the SNP and/or cM value, so if the "pile-up" is embedded in a > longer segment, it will pass muster. > > Ann Turner > > On Mon, Nov 9, 2015 at 7:42 AM, Jim Bartlett via <genealogy-dna@rootsweb.com > > wrote: > > > Andreas, > > 23andMe doesn't use filters, so we see many Matches there that the 3 > > DTCs > > didn't post. In my experience some of them are IBD and Triangulate, but > > many > > don't (and go into my IBS bin) > > > > > > > > Jim Bartlett > > > > ------------------------------- > To unsubscribe from the list, please send an email to GENEALOGY-DNA- > request@rootsweb.com with the word 'unsubscribe' without the quotes in the > subject and the body of the message