Todd C Helmus

Learn More
This study targeted poly-drug (cocaine plus heroin) abstinence among buprenorphine-maintained participants with a 12-week voucher-based reinforcement therapy (VBRT) phase versus a yoked control condition. Baseline levels of cocaine and heroin use were significant predictors of treatment outcome, regardless of treatment assignment. Overall, there were no(More)
Diazepam (DZ) reinforcement was tested under anxiogenic (public speaking) and neutral (computer task) conditions. Individuals with social anxiety disorder (n = 11) and healthy controls (n = 11) participated in two 5-session phases. Each phase used a standard choice procedure (2 sample, 3 choice sessions) comparing 10-mg DZ and placebo. During the public(More)
Over the last decade, U.S. military forces have been engaged in extended conflicts that are characterized by increased operational tempo, most notably in Iraq and Afghanistan. While most military personnel cope well across the deployment cycle, many will experience difficulties handling stress at some point; will face psychological health challenges, such(More)
This study examined the relationship between novelty seeking between treatment retention and among heroin dependent cocaine users. Participants were treated with buprenorphine maintenance and contingency management. The Tridimensional Personality Questionnaire's (TPQ) Novelty Seeking scale was administered to 68 participants prior to buprenorphine(More)
Two studies were conducted to investigate the effectiveness of contingency management techniques in promoting punctual counseling attendance among methadone maintenance patients. In Study 1, 50 participants were recruited from an inner-city methadone maintenance program. Study 1 used an A-B-A design with baseline, intervention, and return-to-baseline(More)
Contingency management procedures have proven effective in the treatment of drug-dependent patients. These procedures, however, often require frequent urine testing, which is too costly for community treatment programs. To make urine-testing procedures more cost effective, the feasibility of reinforcing accurate predictions of urine drug screen (UDS)(More)
This study evaluated the effectiveness of a community-based contingency management (CM) protocol reinforcing punctual dual-diagnosis group counseling attendance and negative breath alcohol levels. Participants were 20 dual-diagnosis patients. The A-B-A within-subjects reversal design included a 4-week baseline phase (BL), a 12-week CM intervention, and a(More)
This study examined the relationship between cocaine withdrawal and lifetime history of depression (major depression, dysthymia). Participants with a history of regular cocaine use (n = 146) were administered the Structured Clinical Interview for the DSM-IV (SCID) and were asked to recall whether they experienced any of the six DSM-IV cocaine withdrawal(More)
Driver fatigue is a significant contributor to motor vehicle accidents and fatalities, although the exact share of those events attributable to fatigue is still uncertain. In 2013, accidents involving heavy trucks killed more than 3,944 people in the United States, with over 80 percent of those killed not in the truck. Numerous factors contribute to driver(More)
This product is part of the RAND National Defense Research Institute working paper series. RAND working papers are intended to share researchers’ latest findings and to solicit informal peer review. They have been approved for circulation by the RAND National Defense Research Institute but have not been formally edited or peer reviewed. Unless otherwise(More)
  • 1