Typos on p. 242, 246, & 249

In the 1st column of p. 242, 8th line, S^D is incorrect. It should be S^Δ instead.

In the 2nd column of p. 246, very last line, S^D should be S^Δ.

A couple of words are missing from the end of the definition of The theory of generalized imitation on p. 249. The last two words of that sentence should be imitative reinforcers.

Typo on p. 143

There appears to be a typo on p. 143, 2nd column, starting on the 3rd line. The phrase, "subject or" should be scratched out where it appears twice in that sentence. This sentence should say "...because it emphasizes that you're comparing the performance of one group of subjects during an experimental condition with the performance of one group of subjects during a control condition."

Diagrams out of place

There are problems with some of the diagrams in Ch. 6. On p. 111 there's a "Dysfunctional Reinforcement Contingency" diagram. Instead of appearing on p. 111, it should be on p. 112, at the bottom of the 1st column or top of the 2nd.

On p. 113, the "Performance Management Punishment" diagram should be moved down so that it appears in the section called "Self-Injuring."

The two diagrams in the 2nd column of p. 113 - "Performance Management Extinction" & "Recovery from Punishment" - should not be there at all. Cross them out.