Gifted Bulletin Board

Welcome to the Gifted Issues Discussion Forum.

We invite you to share your experiences and to post information about advocacy, research and other gifted education issues on this free public discussion forum.
CLICK HERE to Log In. Click here for the Board Rules.

Links


Learn about Davidson Academy Online - for profoundly gifted students living anywhere in the U.S. & Canada.

The Davidson Institute is a national nonprofit dedicated to supporting profoundly gifted students through the following programs:

  • Fellows Scholarship
  • Young Scholars
  • Davidson Academy
  • THINK Summer Institute

  • Subscribe to the Davidson Institute's eNews-Update Newsletter >

    Free Gifted Resources & Guides >

    Who's Online Now
    0 members (), 158 guests, and 16 robots.
    Key: Admin, Global Mod, Mod
    Newest Members
    MyModalert, miappaa, Brooklyn, hellotoyou, polles
    11,456 Registered Users
    June
    S M T W T F S
    1
    2 3 4 5 6 7 8
    9 10 11 12 13 14 15
    16 17 18 19 20 21 22
    23 24 25 26 27 28 29
    30
    Previous Thread
    Next Thread
    Print Thread
    Joined: Dec 2009
    Posts: 45
    L
    Junior Member
    OP Offline
    Junior Member
    L
    Joined: Dec 2009
    Posts: 45
    Dottie or anyone else who can figure out the WISC-IV

    I'm having trouble with the low percentile of my daughter's PSI. I always knew it was average, but this percentile seems wrong.

    The psychologist got her birthdate wrong and a few other things, so I'm wondering if it's an error.

    VCI 134 99%
    PRI 133 99%
    WMI 110 75%
    PSI 94 34%
    GAI 139 99.5%

    It seems odd the percentile of the PSI is so low when the WMI is in the 75% and not that much higher point-wise.

    Thanks for any help,

    Lucijane

    Last edited by Lucijane; 01/08/10 05:47 PM. Reason: spelling!
    Joined: Feb 2009
    Posts: 39
    W
    Junior Member
    Offline
    Junior Member
    W
    Joined: Feb 2009
    Posts: 39
    My DD's PSI of 94 is also listed at the 34th percentile so that looks right to me. Dottie will explain this more coherently, but there's a big bulge of scores between 90 and 110, with 100 as the mid-point/50th percentile. A standard deviation is 15 points above or below that--most people fall somewhere in this range of 85-115. (Dottie, please correct as necessary!)

    Gifted kids can be funny, with scores in one or both of VCI/PRI at two or more standard deviations above 100 (130+) and with scores in WMI and PSI closer to the norm. The NAGC website has some good information on this, and recommendations for using the GAI rather than FSIQ for these types of kids.

    FWIW, we spent some time worrying about this spread and threw in a bit of occupational therapy, but it's pretty clear at this point that the relatively slow processing speed and average WMI that my daughter has only slow her down in a small number of tasks and can be compensated for fairly easily. We've also wondered how much of this is "trainable"--apparently PSI improves with video game and other activities that train kids to have more rapid finger responses.

    Joined: May 2009
    Posts: 2,172
    C
    Member
    Offline
    Member
    C
    Joined: May 2009
    Posts: 2,172
    Originally Posted by Lucijane
    The psychologist got her birthdate wrong and a few other things, so I'm wondering if it's an error.
    I don't know on your original question, but did she correct the birthdate issues? If she was off by any significant amount, that would change her scores/percentiles.

    Joined: Jan 2010
    Posts: 81
    Member
    Offline
    Member
    Joined: Jan 2010
    Posts: 81
    Westcoastmom is right about the percentiles.

    In a normal distribution, you'd expect 68% to fall within one s.d. (standard deviation) of average (100). Since these tests are designed to have s.d. of 15, only 16% of the population scores below 85 and only 16% scores above 115 - on each individual subtest. If 85 = 16th percentile, it makes sense that 94 = 34th.

    But get the birth date fixed before you worry about an average subtest score. besides, processing speed isn't a g-loaded scale.

    Joined: Dec 2009
    Posts: 45
    L
    Junior Member
    OP Offline
    Junior Member
    L
    Joined: Dec 2009
    Posts: 45
    Thanks everyone. He got the birthdate wrong by six days so it won't make much difference.

    Dottie, I do remember that the GAI was originally calculated at 139.95 when he showed me the scores during the break.


    Moderated by  M-Moderator 

    Link Copied to Clipboard
    Recent Posts
    Orange County (California) HG school options?
    by Otters - 06/09/24 01:17 PM
    Chicago suburbs - private VS public schools
    by indigo - 06/08/24 01:02 PM
    Mom in hell, please help
    by indigo - 06/08/24 01:00 PM
    Justice sensitivity in school / DEI
    by indigo - 06/06/24 05:58 AM
    11-year-old earns associate degree
    by indigo - 05/27/24 08:02 PM
    Powered by UBB.threads™ PHP Forum Software 7.7.5