An Introduction to Relational Frame Theory is beautifully designed and 100% user friendly and makes learning about RFT and contextualism a real pleasure for students. I’ve been using it to teach and assess my Psychology of Learning classes for the last number of years. It’s always a hit with students and I consistently find that they show much more appreciation for and understanding of RFT and contextualism after they’ve done it! It’s a fantastic resource and I’m jealous that I didn’t come up with it first.