Higgins ST Comments on contingency management and conditional cash transfers. Health Econ. 2010 Oct;19(10):1255-8. doi: 10.1002/hec.1543.
Higgins, S T., Heil, S. H., & Sigmon, S. C. (2010). Voucher-based contingency management in the treatment of substance use disorders. In G. J. Madden (Ed.), APA Handbook of Behavior Analysis. Washington, DC: American Psychological Association.
Higgins, S T. & Silverman, K. (2008). Introduction. In S.T. Higgins, K. Silverman, & S.H. Heil (Eds.), Contingency management in substance abuse treatment (pp. 1-15). New York, NY: The Guilford Press.
Higgins, S T. & Silverman, K., (2008). Contingency Management. In M. Galanter and H.D. Kleber (Eds.) Textbook of substance abuse treatment (4th ed.). (pp. 387-399). The American Psychiatric Press..
Higgins, S T. and Rogers, R.E. (2009). Contingency management and community reinforcement approach. In Peter M. Miller (Ed.). Evidence-based addiction treatment (pp. 249-267). Burlington: Academic Press, Elsevier Inc.
Higgins, S T., Heil, S.H., Rogers, R.E., & Chivers, L. (2008). Cocaine. In S.T. Higgins, K. Silverman, & S.H. Heil (Eds.), Contingency management in substance abuse treatment (pp. 19-410. New York, NY: The Guilford Press.
Higgins, S T., Sigmon, S.C., Heil, S.H. (2008). Drug abuse and dependence. In D.H. Barlow (Ed.), Clinical handbook of psychological disorders (4th ed.). (pp. 547-577). New York: Guilford Publications, Inc.
Silverman K, Roll JM, Higgins ST Introduction to the special issue on the behavior analysis and treatment of drug addiction. J Appl Behav Anal. 2008 Winter;41(4):471-80.
Interventional studies are often prospective and are specifically tailored to evaluate direct impacts of treatment or preventive measures on disease.
Observational studies are often retrospective and are used to assess potential causation in exposure-outcome relationships and therefore influence preventive methods.
Expanded access is a means by which manufacturers make investigational new drugs available, under certain circumstances, to treat a patient(s) with a serious disease or condition who cannot participate in a controlled clinical trial.
Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.
Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.
