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Narberth, PA 19072-2307
United States

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Mr. Keith Karn, PhD


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1 to 5 of 33 total
Posted By Keith Karn 12-09-2025 16:36
Found In Egroup: Forensics Professional Technical Group
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Fellow Technical Group Members (cross-posting to multiple TGs - I'm sorry for those in multiple groups), I am writing to ask for your thoughts and / or suggested reading / references on the following. The scenario: An older person (80s) is wearing prescription lenses with photochromic lenses (sometimes ...
Posted By Keith Karn 12-08-2025 12:53
Found In Egroup: Perception and Performance Technical Group
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Fellow Perception and Performance Technical Group Members, I am writing to ask for your thoughts and / or suggested reading / references on the following. The scenario: An older person is wearing prescription lenses with photochromic lenses (sometimes referred to as "Transitions Lenses," though I'm ...
Posted By Keith Karn 11-07-2025 13:01
Found In Egroup: Product Design
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Thanks for your comments Brian. I'm sorry for my slow response--super busy with medical device clients who "are ready for human factors" (i.e., want a validation study). :-( I'm glad you approve of our definition of human factors / ergonomics on the HFES website. I take some credit for pulling that together ...
Posted By Keith Karn 11-04-2025 21:38
Found In Egroup: Product Design
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Hi All - Here are a few more thoughts on the TG names: As I mentioned in my prior post, I am a member of many of the HFES TGs including the "User Experience Technical Group (and formerly the Computer Systems and Internet technical groups). They are inexpensive, and represent a broad range of my interests. ...