Source Confidence level
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Post #9840 Posted 1/6/2006 9:32:33 PM


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I had an idea this morning for a feature that I'd like to discuss. With so many different sources of genealogy information these days I reckon a lot of people (me included) don't always go back to primary records before adding an individual to their tree. And depending on the use for the individual/tree, this might be fine.

My idea is to somehow record a confidence level against a piece of information. So if I have a birth certificate extract, I'd say I'm very confident the birth information is accurate. But if someone tells me some information, or i find it on a public website, I might assign it a lower confidence level. Maybe in the sources form would be a good place, assuming all information from the same source should have the same level of accuracy?

Then in the genomap, you'd be able to filter by confidence level or a threshold, or maybe display individuals a little differently if there's not much confidence in the accuracy. Or maybe just hide all individuals that don't have very accurate data.

I do something like this now using a seperate genomap 'Working', but this feature would be more fine-grained. A seperate genomap is kind of like assigning one confidence level to an entire tree.

Thoughts?

Post #9851 Posted 1/7/2006 10:07:01 PM


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Confidence level could be applied to any data (birth, marriage, name, even complex information such as number of children).

Would it make sense to write the confidence level to any data? If it's not entered, it is valid to 0% or 100% confident?

Implementing this feature require a very precise structure else it will be not that useful, or worst not used at all.

Current possible approach:

  • Writing the source, web URL for instance and a notes in the comments field. 
  • Create and use a custom tag to write a number corresponding to your confident level. Later, this value could be use as a filter in report.
  • Enter partial information. In GenoPro you can enter only the year for birth, month and day could be omit if they not known.



If the facts don't fit the theory, change the facts.
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http://www.genopro.com

Post #9852 Posted 1/8/2006 12:35:27 AM


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Hello,

  I think this idea is very important, and rather simple to implement.  Basically, a simple 1-5 range of confidence can be assigned to every source item, with the information source receiving this level of confidence.  A simple explanation such as:

5 = primary document / immediate family member
4 = secondary document / related family member
3 = family lore / historical lore
2 = hearsay
1 = conjecture / rationalization

This can be another field in the Source record, with little interference with the rest of the system, while giving a very valuable mechanism of retaining information about the validity and confidence level of the sources.  In my book, this should be added in the current version (before 2.0 is released).

Danny

Post #9854 Posted 1/8/2006 9:55:20 AM


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It would be a personal note at best

i like the 1- 5 method given above but i dont see why i would need to be so exacting i mean its your personal tree
Post #9862 Posted 1/9/2006 2:19:53 PM


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The Gedcom 5.5 standard already has this feature in the QUAY (quality) tag or 'Certainty Assessment' that qualifies the SOURce records and it can have 4 levels

CERTAINTY_ASSESSMENT:= {Size=1:1}

[ 0 | 1 | 2 | 3 ]

The QUAY tag's value conveys the submitter's quantitative evaluation of the credibility of a piece of information, based upon its supporting evidence. Some systems use this feature to rank multiple conflicting opinions for display of most likely information first. It is not intended to eliminate the receiver's need to evaluate the evidence for themselves.

0 = Unreliable evidence or estimated data
1 = Questionable reliability of evidence (interviews, census, oral genealogies, or potential for bias for example, an autobiography)
2 = Secondary evidence, data officially recorded sometime after event
3 = Direct and primary evidence used, or by dominance of the evidence

I recommend that GenoPro recognises and maintains this Gedcom field as part of its source records (curently gets imported as custom tag)


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Post #9863 Posted 1/9/2006 2:24:12 PM


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This is an excellent suggestion.  I have seen the Gedcom QUAY tag previously.  This feature will be in the Source Record.

Post #13191 Posted 9/17/2006 10:59:11 AM
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This is a valuable feature but it does not apply to Pedigree linkOn the diagram shown it is probable that George Cowell is the same person as George Moulting Cowell, b. 1809. All the records are from the same church. It would not be correct to modify the marriage between Joseph and Martha, even though I do not have the details for this. However the two birth records of George and Charles name them as parents.

I think it would be very important that the pedigree link could be qualified. I have at least one example where there are questions about the parentage of one in a group of siblings. For gene based work this would be of great importance

Post #13194 Posted 9/17/2006 12:32:09 PM


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Great suggestion again.

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