Thursday, August 9, 2007

Monthly SClistserv charts

Article contents.

Friday, July 6, 2007 | |

Standard Celeration Chart analysis

Hello Bloggites,

Sorry for my absence. I have made it a priority to blog at least once a week.

I wanted to take a new direction with this next series of entries but I will go back to my previous one (PT definition) in the future.

You well see two charts. The first graph and the second one shows the same data re-charted on an SCC. I made a movie to talk about this more extensively. Go here to see the movie:

http://web.mac.com/precisionteaching/iWeb/Site/Party%20Movies/C2853648-F0E8-445D-B069-EFD05146A2D1.html

In the movie I talk about jumps and turns. Looking at each phase we can draw a celeration line through the data. When we compare one celeration line to the the next we can look for a change (you can do this with add-subtract graphs as well). However, with the SCC you can actually quantify the magnitude of the change.

Add-subtract Graph.jpg


Standard Celeration Chart.jpg
The two types of changes:

Jump (jump up, jump down, no jump): a sudden increase or decrease in Frequency that maintains the increase or decrease and does not go back to the prior frequency (Graf and Lindsley, p. 42, 2002)

Turn (turn up, turn down, no turn): gradual increase or decrease in Celeration that increases or decreases the Frequencies (Graf and Lindsley, p. 42, 2002)

So these two ways of analyzing the data can only occur if we use an SCC.

More on measurement in the next post.

Wednesday, June 27, 2007 | |