DMDX
can control both the background color of the experiment and the color of text
in individual items. We will cover
various methods to accomplish each in turn
You can set the background
color for the entire experiment using any of the following keywords in the
parameter line
<BackgroundColor
N>
<bc
N>
<bgc
N>
N
is an RGB
triplet. It indicates the background color as a composite of (R)ed,
(G)reen, and (B)lue. You indicate
the intensity of each of these color components on an 8-bit intensity scale
from 0 Ð 255.
000
means form a color with 0 intensity red, 0 intensity green, and 0 intensity
blue. This color would be black.
255255255
means form a color with 255 intensity red, 255 intensity green, and 255
intensity blue. This color would be
white. White is the default
background color if you do specify one.
210210210
is a pleasing gray that we use in our labs.
You
can use RGB calculators to
determine the RGB triplet value for various colors you might choose.
You
can also change the background color for a specific frame of an item by using
any of the above keywords in a specific frame of an item. Used this way, background color will
only change for that specific frame.
There
are three ways to modify the color of text in your experiment. If you do not specify a writing color in
one of these ways, the default is black.
1. You can specify a default writing color
for all text in the experiment by using any of the following keywords in the
parameter line.
<WritingColor
N>
<w
N>
<wc
N>
Again,
N is an RGB triplet as discussed above for background color. It is important to note that if you
specify a writing color using these keywords, it will override the WYSIWYG
features of DMDX discussed below.
2. You can use the same writing color
keywords in a specific frame of an item.
This will set the writing color for just that frame. For example in the following item, the
word Black will be presented in black script followed by the word BLUE
presented in blue script.
10
<wc 000000000>ÒBlackÓ <% 30> / <wc 000000255> ÒBLUEÓ <%
30>/;
3. You can specify color using the What you
see is what you get (WYSIWYG) features of DMDX. Assuming you have not used the writing
color keywords discussed above, DMDX will use the actual color of the text in
your itemfile to determine the color to present the text in. For example in the following item, the
word BLUE will be presented in red script.
10 ÒBLUEÓ/;
created by Nicole Strang
last edited on