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Info-Graphics Digest	Sun Mar 16 03:00:32 PST 1986

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Today's Topics:

 Re: Info-Graphics Digest
 Decision Maker's Graphics
 SEARCHING VISUAL INFORMATION

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Date: Tue, 11 Mar 86 23:33:23 EST
From: ronnie@EDDIE.MIT.EDU (Ron Schnell)
Subject: Re: Info-Graphics Digest
Organization: MIT, EE/CS Computer Facilities, Cambridge, MA


Someone posted some fixes to the program "pcb" a while ago.
Could someone point me in the direction of this?


				#Ron (ronnie@mit-eddie)

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Subject: Decision Maker's Graphics
Date: 10 Mar 86 19:07:01 PST (Mon)
From: stever%tektronix.csnet@CSNET-RELAY.ARPA
Source-Info:  From (or Sender) name not authenticated.

Here is something that might be of interest to this
news group:


*************************************************************
    
        ENHANCED COMPUTER GRAPHICS FOR DECISION MAKERS

         a dissertation defense and oral examination   


                      feb 28, l986
 
                    by Floyd J. Brock


        Words need a context to be understood.  Visual 
   patterns also need a context to convey their meaning.
   When patterns represent quantities in business
   graphics, decision makers (DMs) depend on contrasting
   visual contexts to discern patterns and discover
   relationships.  Depending on the context in which DMs
   see trends, differences between two trends may point
   to a problem, continuity, or an opportunity.

        Can enhancing the context in computer graphics
   help DMs visualize problems?  To answer this research
   question, three experiments were done in the field on
   computer graphics.  One hundred five DMs tried 17
   different contexts for time-series trends displayed on
   a microcomputer monitor.  The research objective was
   to find out whether or changing the context in graphics
   affected the decision efficiency (accuracy/response
   time) of DMs in determining relationships among
   trends.  Essential for measuring the effect were
   interactive computer programs that displayed random
   trends in graphics of differing contexts, collected
   the DMs' answers to questions about the trends, and
   graded 1133 graphics based on the answers, response
   times, and trend data.

        The experimental results supported the hypothesis
   that computers can enhance the visual context
   surrounding time-series trends so that DMs can better
   visualize problems.  Results were based on comparisons
   of DMs' decision efficienies between trial graphics
   with differing contextual enhancements and on answers
   to questions about the trial graphics.  The results
   were tested with nonparametric statistics at the 0.05
   significance level.  Specific findings were:

   --Computer-suppolied forecasts, as an enhancement,
     significantly helped DMs find differences among
     trends.

   --Although not statistically significant, stratified
     presentation of trends and fading chartjunk tended
     to increase DMs' efficiencies.

   --Adding two colors, as an enhancement, made no
     difference in efficiency over black and white.

   --Paired trends in windows did not affect efficiency
     significantly.

   --Sequentially traced trends and composites of
     enhancements did not affect efficiency signifi-
     cantly.

   --DMs preferred stratified trends most and had the
     most confidence in graphics with fading context.
     They liked least and had the least confidence in
     black-and-white graphics.

***********************************************************


Floyd Brock can be reached through the Systems Science Ph..D.
Program, P.O. Box 750, Portland State University, Portland, OR.,
97207.  503-229-4960.

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Date: 12 MAR 86 17:06-EST
From: ANK%CUNYVMS1.BITNET@WISCVM.WISC.EDU
Subject: SEARCHING VISUAL INFORMATION

I am interested to know if anyone is working on graphic representation of
knowledge ? More specifically, designers (architects, artists,) and some
other professions, are able to recollect and subsequently search for parts
of information, that are pictorial in representation. AutoCAD has symbol
libraries, and Macro's that many designers call-up frequently. But these
macro's are essentially linquistically addressed. If one were to say draw a
"table", how would one design the recoginition procedure that would
retrieve five or ten types of tables, and display it ?

        I am about to begin addressing some f these pictorial-verbal label
issues in my research, and need some input from individuals who are aware
or ideas and strategies. Please send suggestions to
ank%cunyvms1.BITNET@wiscvm.edu I promise to mail all the suggestions to
other people, and may put it in the network if so desired. Thanks

                                Anil Khullar
                                (ank%cunyvms1.BITNET@wiscvm.edu)
                                Ph.D. program in Psychology,
                                Box 295, C.U.N.Y. Graduate Center,
                                33 W 42 St. NewYork NY 10036


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