The investigators propose that brief training in regulation of craving may increase the efficacy of smoking cessation, but that training in cognitive vs. mindfulness-based strategies may operate via different psychological and neural mechanisms.
The investigators propose to test the efficacy of such training by randomizing 126 cigarette smokers to the following conditions: 1) brief training in cognitive regulation of craving 2) mindfulness-based training, and 3) control or no training. Training will be delivered in 6x1 hour computerized sessions over four weeks. Control subjects simply fill out assessments during their visits. Participants who were randomized into the cognitive or mindfulness training complete Regulation of Craving (ROC) training sessions of approximately 60-90 minutes. If randomized into the cognitive regulation training, subjects will be trained to use a cognitive strategy that instructs them to think of all the negative outcomes associated with continued cigarette smoking. If randomized into the MBT-based regulation training, subjects will be trained to use a mindfulness strategy that instructs them to notice and accept their feelings of craving without judgment or intent to act upon them. After all training sessions are completed, there is a 4 week and 12 week follow-up. The investigators will evaluate the effects of training on craving and regulation of craving measured by self-report and functional magnetic resonance imaging during the Regulation of Craving(ROC) task administered pre- and post- treatment, as well as smoking.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
92
Regulation strategy practice: Participants will be trained to use a CBT-based cognitive regulation strategy. They will be asked to think of their individualized negative consequences for and thing of them when they see the instruction "LATER" during the task. Participants will practice using this strategy for multiple cigarette stimuli. High-Risk Situation Practice: Participants will identify 10 situations in which they usually smoke, or are likely to smoke in the next 48 hours. For each situation, they will be asked to practice using the strategy and to plan to use this strategy to regulate craving in daily life.
Each training session in this condition will be identical to the CBT-based training session described, with the exception of the strategy being trained. Specifically, participants will be trained in using the MBT-based strategy ("notice craving and accept the feeling without judgment or reaction"). To do so, they will be asked to generate their own non- reactive responses to craving (e.g., "I can just sit here and notice this. I can ask myself, 'can I be ok with this feeling?'") Participants will then be instructed to think of those accepting and non-reactive responses when they see the instruction "ACCEPT" during the task. All other components will be identical.
Clinical & Affective Neuroscience Lab
New Haven, Connecticut, United States
Change in Self-report Craving level
ROC task performance, as change from pre- to post- training in (1) craving (operationalized as self-reported craving on craving trials). (2) strategy-specific regulation (operationalized as scores on regulation trials using the trained strategy: LATER/control trials for CBT-based training, ACCEPT/mindfulness trials for MBT-based training). (3) strategy-non-specific regulation (scores on regulation - using the non-trained strategy: LATER trials for MBT-based training, ACCEPT trials for CBT-based training).
Time frame: Baseline to 4 weeks
% change in craving and control related neural activity measured via functional magnetic resonance imaging (fMRI).
The neural activity component will be calculated as change from pre-to post- training during fMRI ROC task, including (1) craving- related activity (operationalized as neural reactivity in "craving regions" including Ventral Striatum, ventral medial Pre-Frontal Cortex); (2) neural substrates of control during regulation of craving (operationalized as neural activity in "control regions" including dorsal lateral and ventral lateral prefrontal cortex).
Time frame: Baseline to 4 weeks
Change in Smoking
Measurement of reduction in cigarette smoking, measured by self report/cotinine/Carbon dioxide(CO2), and FTND smoking severity
Time frame: baseline to 4 weeks
Change in Cognitive Control & Affective Reactivity Behavioral Assessments
Detection of generalized effects of the training on affective reactivity and cognitive control, including: (1) Distress Tolerance, (2) CANTAB neuropsychological assessments, and (3) Drug Risk Response Task (DRRT) to measure regulation skills acquisition.
Time frame: baseline to 4 weeks
Change in general neural activity measured via fMRI
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Determination if the effects of training generalize to other measures of cognitive control/distress tolerance, using fMRI task neural activity.
Time frame: Baseline to 4 weeks