339 obese individuals reporting stress symptoms were recruited and randomized to either ( 1 ) a minimal contact web-guided Cognitive Behavioral Therapy-based ( CBT ) intervention including an approach of health assessment and coaching methods , ( 2 ) a mobile-guided intervention comprising of mindfulness , acceptance and value-based exercises , ( 3 ) a face-to-face group intervention using mindfulness , acceptance and value-based approach , or ( 4 ) a control group .