Please assess the completion status of the following clinical trial:

Trial Title: Imaging the Neurobiology of a Behavioral Treatment for Cocaine Dependence

Study Design Characteristics:
- Allocation: NON_RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: NONE
- Phase: None
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* Males or females between 21 and 45 years old~* Fulfill DSMIV criteria for cocaine abuse or dependence~* Able to give informed consent and comply with study procedures~* Medically Healthy~Exclusion Criteria:~* Major DSM-IV Axis I disorder other than cocaine abuse or dependence. Subjects with a history of other psychostimulant abuse/dependence or compulsive gambling will be excluded.~* Current use of opiates, sedative-hypnotic, and/or cannabis more than twice a week (use less than twice a week is acceptable).~* Current use of psychotropic medication such as antipsychotics or antidepressants.~* Presence or positive history of severe medical or neurological illness (including epilepsy), or any cardiovascular disease, low hemoglobin (Hb \< 14 gm/dL in males, Hb \< 12 gm/dL in females), or SGOT or SGPT \> 2-3 times normal. Chronic active hepatitis B or C will also be an exclusion criteria.~* Resting SBP \>150, DBP \> 90~* Pregnancy or lactation, lack of effective birth control during 15 days before the scans\*~* Evidence /report of any heart abnormality during intake medical history, EKG or physical exam.~* Metal implants or paramagnetic objects contained within the body which may interfere with the MRI scan, as determined in consultation with a neuroradiologist and according to the guidelines set forth in the following reference book commonly used by neuroradiologists: Guide to MR procedures and metallic objects Shellock, PhD, Lippincott Williams and Wilkins, NY 2001.~* Lifetime exposure to radiation in the workplace, or history of participation in nuclear medicine procedures, including research protocols \*\*~* Positive Allen Test indicating lack of collateral blood flow to hand~* History of sensitivity to methylphenidate

- Gender: ALL
- Minimum Age: 21 Years
- Maximum Age: 45 Years
- Healthy Volunteers: t

Study Arms:
- Contingency Management w/ CRA (Type: ACTIVE_COMPARATOR): Cocaine users: Contingency management w/ Community Reinforcement Approach
- Healthy Control (Type: NO_INTERVENTION): A group of healthy matched comparison subjects with no DSM-IV axis I Disorder was included; they were matched for cigarette smoking, gender, and ethnicity.

Based on this trial design, predict the completion outcome and termination type (if applicable).