Posted by
Andy W on
Mar 02, 2018; 12:49pm
URL: http://spssx-discussion.165.s1.nabble.com/testing-for-homoscedasticity-in-SPSS-tp5735562p5735606.html
Rich, the OP stated they were blind -- I'm not sure how exactly a blind
person would be able to apply much of your advice.
I might go a bit of a different tact. For those who are not completely
blind, but are visually impaired, you can export SPSS graphs as vector
images, in which case you can zoom in and make the chart encompass your
entire field of vision. The easiest way would be to export charts as PDF
files from SPSS.
If this is the case, even if you need a screen reader but have some vision
that might work out OK. Even in a blurry scatterplot you could assess
heteroscedasticity. You don't need to be able to resolve each individual
stroke of a point in the scatterplot to see the overall distribution of
points. Some things like a histogram can never be really articulated in a
set of statistics.
Either myself or other folks on this forum can help with constructing a
chart template that makes this easier, such as larger fonts, bigger points,
or higher contrast.
If you are entirely blind, I might suggest making a user request to SPSS --
a simple tool to export charts as STL files, which you can then 3d print.
(The smaller 3d printers anymore are not that expensive.) It would be a slow
process, but tactically you could also easily identify heteroscedasticity.
Again I think that would also be very useful in general for histograms.
-----
Andy W
[hidden email]
http://andrewpwheeler.wordpress.com/--
Sent from:
http://spssx-discussion.1045642.n5.nabble.com/=====================
To manage your subscription to SPSSX-L, send a message to
[hidden email] (not to SPSSX-L), with no body text except the
command. To leave the list, send the command
SIGNOFF SPSSX-L
For a list of commands to manage subscriptions, send the command
INFO REFCARD