Combating Craving With Contingency Management: Neuroplasticity and Methamphetamine Abuse in South Africa
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 28
- 试验地点
- 2
- 主要终点
- Responses to Contingency Management
研究概览
简要总结
This study will link findings from neuroscience with clinical outcomes using contingency management (CM) to identify changes in brain structure and function that emerge during purely behavioral therapy for methamphetamine (MA) use.
详细描述
This study will correlate MA-abstinence outcomes from an 8-week program of voucher-based incentives using an escalating schedule for 30 treatment-seeking, MA-dependent individuals with scores on tasks of working memory and assessments of neuropsychological and demographic status. At the beginning and end of the CM program, participants will participate in MRI scans while performing a working memory task and will complete a battery of select neurocognitive and psychological assays to address two specific aims: (1) to determine whether changes in neural function within frontostriatal circuitry from baseline to end of the 8-week CM program are associated with parallel changes in measures of cognitive control and impulsivity and with MA abstinence outcomes and (2) to determine whether structural changes in frontostriatal circuitry over the 8-week CM intervention correspond with neurocognitive, psychological and MA abstinence measures.
研究设计
- 研究类型
- Interventional
- 分配方式
- Na
- 干预模型
- Single Group
- 主要目的
- Treatment
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 45 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •provide voluntary informed consent
- •meet DSM-5 criteria for MA or amphetamine use disorder
- •provide at least one urine sample positive for MA/amphetamine metabolites during screening (i.e. prior to the commencement of the study).
- •aged 18-45
- •right-handed
- •English-speaking
排除标准
- •currently receiving treatment for stimulant addiction or needing more intensive treatment than outpatient care
- •meet DSM-5 criteria for substance use disorder other than nicotine
- •unable to attend 4+ visits during the 2-week screening period or to complete measures
- •Physical or mental illness that would require intervention that would alter imaging or that would interfere with safe study participation
- •pregnant, claustrophobic, or have metal prostheses, cardiac pacemakers, or metal clips that are incompatible with the scanner
- •HIV positive status
- •unable to comprehend written or spoken English
- •currently taking psychiatric medication
研究组 & 干预措施
Contingency Management
In exchange for consecutive urine samples documenting methamphetamine abstinence, participants receive increasingly valuable reinforcers.
干预措施: Contingency Management (Behavioral)
结局指标
主要结局
Responses to Contingency Management
时间窗: 8 weeks
urine samples documenting methamphetamine abstinence
fMRI Measures
时间窗: Change b/w baseline and 8 Weeks
measures of resting state connectivity
次要结局
- Continuous Performance Task(Change b/w baseline and 8 Weeks)
- Stroop(Change b/w baseline and 8 Weeks)
- Stop Signal Task(Change b/w baseline and 8 Weeks)
- Balloon Analog Risk Task(Change b/w baseline and 8 Weeks)
研究者
Steve Shoptaw
Professor
University of California, Los Angeles