I wasn't able to find very much on this subject -- but these sites may help you.
For an example, my IQ tests have varied by 20 points, depending upon when I took each test. My lowest score was in the evening when I was tired from taking care of my two toddlers during the day.
thanks a lot Ms. sue
I was getting really stressed.
Have a good night.
You're welcome, Rose. You have a good night, too. :-)
By the way, although I have a masters (years ago) in educational counseling, I hadn't heard of these terms. They don't seem to be very common.
Absolute continuity typically refers to the consistency of the average score on a given trait over time, while differential continuity refers to the stability of individual differences in scores.