The 7th Edition is precisely what I find wrong with textbook publishing today. If you're a graduate student (or any student for that matter), you have probably noticed that new editions for textbooks are being released increasingly more frequently, rendering texts far less valuable for resale than they would ordinarily be. I went to the book store and found ABA for Teachers with both the 6th and 7th editions on the shelf. I was cynical about how much the book would have changed in roughly a year's time from one edition to the next, and sure enough, they are practically identical.
It is almost humorous to note that the forewards of the two editions were not even modified. The paragraph on 'Updates' to the editions is the same, noting substantial changes to one chapter and the decision to retain a particular example about a mouse. I referred to the chapter in question, and it was the same in both books. By all appearances, the changes to the 7th edition (to my eyes) are all cosmetic and do not involve content. The 7th edition is almost one hundred pages shorter than the the previous edition, due it appears to the format being changed to more of a workbook-type, taller text. Also, the headings and sidenotes now have colored fonts in many instances. If having a taller, thinner text and colored fonts is worth the extra money to you, go ahead and shell out the extra money. Otherwise, don't let the book publishers get the last laugh and stick with the 6th edition which is in substance the same book.
