"When you say “stop moving articulations”, I assume that’s a full block? If so, just say “block”" Yes, the outcome of the compulsive response 'not moving articulators' is a block. However, I was trying to stress the 'compulsive' nature as this core behavior is what I'm trying to approach (not the block itself). ​ "Write a direct/simple definition of motivation, requirement, prediction and trust." A simple and direct definition is: perceived trigger (as a reason) to do a compulsive response. ​ Conclusion: In my experience, your advice to deal with my compulsive response: 'not moving articulators', is not effective. This could indicate that some compulsive responses are more hardwired for some PWS than for others.