combined, for the 82 students the pre-test score was 4.96 and the post-test
score was 5.89 for a gain of 1.03 years.

Where I get puzzled is when the report states, Quote:" For adult learners in
Year 1 these results translate to an average of one grade-level gain for
every 10 hours of reading instruction. For Year 2 students it is an average
of one grade-level gain for every 12.5 hours of reading instruction." End
Quote  If, as stated in the report,   pre-and post-tests were separated by
20 hours of reading instruction how was gain in 10 hours or 12.5 hours of
instruction determined?  And how does the phrase "for every" enter in if
only one set of pre- and post-test scores were obtained for each student,
presumably after 20 hours of reading instruction?

Help please!!
Tom Sticht