Hypnotic suggestion and placebo for the treatment of chronic headache in a university volunteer sample. Spanos, Nicholas P. Liddy, Sharon J. Scott, Heather Garrard, Catherine Sine, Joy Tirabasso, Angela Hayward, Amber Abstract Following a 3-wk baseline, 136 university student volunteers who reported chronic headache were administered either 1 or 4 sessions of imagery-based hypnotic treatment, Read More