From mboxrd@z Thu Jan 1 00:00:00 1970 Path: main.gmane.org!not-for-mail From: "Lennart Borgman" Newsgroups: gmane.emacs.devel Subject: Re: Putting blink-cursor-mode in Options menu. Date: Thu, 3 Mar 2005 23:42:26 +0100 Message-ID: <002401c52043$a69f1bb0$0200a8c0@sedrcw11488> References: <200503010034.j210Y4k13181@raven.dms.auburn.edu> <200503011608.j21G8OL15703@raven.dms.auburn.edu> <200503011726.j21HQxZ17274@raven.dms.auburn.edu> <200503030410.j234AG309231@raven.dms.auburn.edu> NNTP-Posting-Host: main.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: 7bit X-Trace: sea.gmane.org 1109891322 22353 80.91.229.2 (3 Mar 2005 23:08:42 GMT) X-Complaints-To: usenet@sea.gmane.org NNTP-Posting-Date: Thu, 3 Mar 2005 23:08:42 +0000 (UTC) Cc: jasonr@gnu.org, emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Fri Mar 04 00:08:41 2005 Original-Received: from lists.gnu.org ([199.232.76.165]) by ciao.gmane.org with esmtp (Exim 4.43) id 1D6zQb-0003ZL-LJ for ged-emacs-devel@m.gmane.org; Fri, 04 Mar 2005 00:08:21 +0100 Original-Received: from localhost ([127.0.0.1] helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1D6zje-00044s-Jd for ged-emacs-devel@m.gmane.org; Thu, 03 Mar 2005 18:28:02 -0500 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1D6zhz-0003VV-3L for emacs-devel@gnu.org; Thu, 03 Mar 2005 18:26:19 -0500 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1D6zhr-0003Rl-4C for emacs-devel@gnu.org; Thu, 03 Mar 2005 18:26:12 -0500 Original-Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1D6zhq-0003Nr-S5 for emacs-devel@gnu.org; Thu, 03 Mar 2005 18:26:10 -0500 Original-Received: from [81.228.9.107] (helo=av2-1-sn3.vrr.skanova.net) by monty-python.gnu.org with esmtp (Exim 4.34) id 1D6zB2-0002sU-SB; Thu, 03 Mar 2005 17:52:17 -0500 Original-Received: by av2-1-sn3.vrr.skanova.net (Postfix, from userid 502) id 2BA5A37E4F; Thu, 3 Mar 2005 23:52:16 +0100 (CET) Original-Received: from smtp1-1-sn3.vrr.skanova.net (smtp1-1-sn3.vrr.skanova.net [81.228.9.177]) by av2-1-sn3.vrr.skanova.net (Postfix) with ESMTP id 1E3A737E43; Thu, 3 Mar 2005 23:52:16 +0100 (CET) Original-Received: from sedrcw11488 (t3o58p148.telia.com [195.252.56.148]) by smtp1-1-sn3.vrr.skanova.net (Postfix) with SMTP id 3338838011; Thu, 3 Mar 2005 23:52:14 +0100 (CET) Original-To: , "Luc Teirlinck" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1409 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org X-MailScanner-To: ged-emacs-devel@m.gmane.org Xref: main.gmane.org gmane.emacs.devel:34154 X-Report-Spam: http://spam.gmane.org/gmane.emacs.devel:34154 ----- Original Message ----- From: "Richard Stallman" > I clearly said in previous postings > that the blinking cursor produced discomfort to me because of > neuro-physiological differences with what presumably is the majority > of people. > > I believe you. > > What we should do depends on how common this condition is. What > fraction of users react this way? Is it 10%? 1%? .01%? > > Maybe someone can find something in the user interface literature > which reports on this. I know nothing about this particular matter, but it may be more common than one expects. In a well controlled study of flourescent lighting it turned out that about 25% of the population could be sensitive to that sort of blinking. The study results showed increased headaches, stomach problems etc. The blinking in this case is however invisible (around 100Hz) and the magnitude only around 50%. (High frequency flourescent lighting was used for comparision in this double blind study. This is around 30kHz and maybe a few % in magnitude - if I remember correctly.) Of course blinking light has a more overall impact on your eyes and brain. So you can not compare directly. It seemed in that case however that young people (with maybe faster neurology) had most difficulties with the blinking light.