Crowley has help some people on this forum; other not so much. Use the Search function (Crowley + yip) for more details.
Here are some other threads that might be helpful. Jim T is still an active contributor here. I hope you get some relief.
http://community.hsbaseballweb...14#29875661668703214
http://community.hsbaseballweb.../topic/yips-are-gone
http://community.hsbaseballweb...roach-towards-a-cure
https://community.hsbaseballweb.com/topic/the-yips