Table 1.

Summary of behavioral approach test contexts for each fear domain

Domain	Context A	Context B
Fear of enclosed spaces	Lying supine within a tightly enclosed wooden chamber	Lying supine within a mock fMRI scanner
Fear of contamination	Touching a mixture of dirt, dead insects, and hair, with both hands	Touching a toilet with potting soil smeared on the inside, with both hands
Fear of public speaking	Speaking on a topic selected for treatment, 3 people observing, not videotaped	Speaking on a new topic (not practiced during exposure), via skype to a team of 3 speech evaluators, and videotaped
Anxiety sensitivity	Inhaling 35% CO2/65% O2 gas mixture for 10 s	1 min voluntary respiratory challenge

Note: Context A stimulus was also encountered during exposure therapy.