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[Gzz-commits] manuscripts/Paper exper.txt
From: |
Janne V. Kujala |
Subject: |
[Gzz-commits] manuscripts/Paper exper.txt |
Date: |
Fri, 28 Feb 2003 07:31:42 -0500 |
CVSROOT: /cvsroot/gzz
Module name: manuscripts
Changes by: Janne V. Kujala <address@hidden> 03/02/28 07:31:40
Modified files:
Paper : exper.txt
Log message:
more exper
CVSWeb URLs:
http://savannah.gnu.org/cgi-bin/viewcvs/gzz/manuscripts/Paper/exper.txt.diff?tr1=1.4&tr2=1.5&r1=text&r2=text
Patches:
Index: manuscripts/Paper/exper.txt
diff -u manuscripts/Paper/exper.txt:1.4 manuscripts/Paper/exper.txt:1.5
--- manuscripts/Paper/exper.txt:1.4 Wed Feb 26 10:06:43 2003
+++ manuscripts/Paper/exper.txt Fri Feb 28 07:31:38 2003
@@ -11,20 +11,21 @@
- means: show that text size has much stronger effect on reading speed
than the presence of a background texture
- - 2 test cases: white background and texture background
- - each subject reads 24 texts (length approx. 15 s) on the
- two types of backgrounds and the time is measured
- - 12 different font sizes are used, ranging from about 4mm to 2cm;
+ - 3 test cases: white background, light texture, and dark texture
+ - each subject reads 12 texts (length approx. 15 s) on the
+ three types of backgrounds and the time is measured
+ - 6 different font sizes are used, ranging from about 4mm to 2cm;
for each font size, there are two texts
- - the subjects are in two groups and, for each text,
- the order of the two test cases is reversed between the groups
-
+ - for each text, each of the 6 possible permutations of
+ the bg types is used for one subject
+
- desired results
- draw a graph of reading speed as a function of font size for
both cases
- - the transition from readable to unreadable should occur only slightly
- sooner for the texture background when the font size decreases;
+ - we hope that the transition from readable to unreadable
+ occurs only slightly sooner for the texture backgrounds when
+ the font size decreases;
for sizes over the threshold, the reading speed should be
approximately the same for both cases
@@ -36,34 +37,44 @@
- trust the subject to read carefully?
- read aloud?
- ask questions afterwards?
- - would it be better to use different texts for the two test cases?
+ - would it be better to use different texts for three bg types?
(i.e., is the memory effect stronger than the variation between
the texts)
- is the total of 2 * 6 subjects = 12 trials for each
- (font size, test case) pair enough to compensate the
+ (font size, bg type) pair enough to compensate the
memory effect and to obtain small enough variance?
-
- - how to scale the font?
- should the background be scaled with it?
- - what textures to use?
- If we use unique textures for each text, they add extra
- variation to the reading speed.
+ - how to scale the font? should the background be scaled with it?
+ - should the bg textures be assigned in random order to the texts
+ for each subject?
+ - should the font sizes be assigned in random order to the textx
+ for each subject?
Recognizability test
--------------------
-- objective: show that textures can be remembered and that
- they are better than single colors
+- objectives:
+ - show that textures can be remembered
+ - show that textures can be remembered better than single colors
+ - compare the recognizablity of light and dark textures
+- procedure
- test cases: single color / full textures [ / grayscale textyres ]
- - learning phase: show 30 textures in series, 5 seconds each
+ - learning phase: show 15 textures in series, 5 seconds each
- recognition phase:
- trials: 30 new textures mixed in and shuffled with the 30 old;
+ trials: 15 new textures mixed in and shuffled with the 15 old;
for each trial, the subject answers old/new
-ISSUES:
- - probably need some repetition to be able to memorize!
+ - three different tests are done for each subject with
+ single color / light texture / dark texture background
+
+ - In what order should we do the three subtests?
+ There should ne no memory effect (obviously we need to
+ use different light and dark textures).
+ However, the subject could learn during the tests.
+ Perhaps use all the 6 different orders for the 6 subjects.
+
+
- [Gzz-commits] manuscripts/Paper exper.txt, Janne V. Kujala, 2003/02/25
- [Gzz-commits] manuscripts/Paper exper.txt, Janne V. Kujala, 2003/02/25
- [Gzz-commits] manuscripts/Paper exper.txt, Janne V. Kujala, 2003/02/26
- [Gzz-commits] manuscripts/Paper exper.txt, Janne V. Kujala, 2003/02/26
- [Gzz-commits] manuscripts/Paper exper.txt,
Janne V. Kujala <=
- [Gzz-commits] manuscripts/Paper exper.txt, Janne V. Kujala, 2003/02/28
- [Gzz-commits] manuscripts/Paper exper.txt, Janne V. Kujala, 2003/02/28
- [Gzz-commits] manuscripts/Paper exper.txt, Tuomas J. Lukka, 2003/02/28
- [Gzz-commits] manuscripts/Paper exper.txt, Janne V. Kujala, 2003/02/28