[APG Public List] forms of bias to think about

Noreen Manzella nalexmanz at yahoo.com
Sun Dec 27 10:21:58 MST 2009

Thanks for posting this.  These are 3 points that my husband and I frequently discuss as they relate to a variety of issues.  I will definitely share these with him.

--- On Sun, 12/27/09, hhsh at earthlink.net <hhsh at earthlink.net> wrote:

From: hhsh at earthlink.net <hhsh at earthlink.net>
Subject: [APG Public List] forms of bias to think about
To: apgpubliclist at apgen.org
Date: Sunday, December 27, 2009, 4:18 PM

For a reflective time: I just ran across three principal biases identified in
1974 and recounted by Jerome Groopman in 2009 in the context of medical
diagnosis. They seem relevant to genealogical diagnosis as well!


    "anchoring," where a person overvalues the first data he encounters and so is
skewed in his thinking;

    "availability," where recent or dramatic cases quickly come to mind and color
judgment about the situation at hand; and

    "attribution," where stereotypes can prejudice thinking so conclusions arise
not from data but from such preconceptions.

[end quote]

New York Review of Books 56(17):26, 5 November 2009, citing Amos Tversky and
Daniel Kahneman, "Judgment Under Uncertainty: Heuristics and Biases: Bias in
Judgments Reveals Some Heuristics of Thinking Under Uncertainty," Science
I185(4157), 1974.


Harold Henderson
Research and Writing from Northwest Indiana
hhsh at earthlink.net
home office 219/324-2620

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