Antoine Bechara, PhD
Purpose: Assists in the evaluation of decision making mediated by the prefrontal cortex.
Age: 18 through to 79 years
Time: 15-20 minutes to administer and score
The IGT originally developed to assist in detecting decision-making impairment in patients with prefrontal cortex damage, is a computerized assessment that is carried out in real time and resembles real-world contingencies. Specifically, the task allows examinees to select cards from four decks displayed on-screen. Examinees are instructed that the selection of each card will result in winning money but that, every so often, a card selection also will result in losing money. Examinees are told to attempt to accumulate as much money as possible.
Several optional settings can be customized by the examiner prior to administration, including:
- Intertrial interval
- Number of trials (i.e., card selections)
- Type of currency
- Starting amount of money
- Two export formats are available, enabling flexibility with data management.
- Import features enable the user to import data from previous versions of the IGT.
Evidence provided by a number of research studies suggests that the IGT is a valid measure. Specifically, the IGT has been used in studies examining decision-making capacity in a variety of populations, including:
- Focal brain lesions
- Intact older adults
- Substance addiction
- Pathological gambling
- Obsessive-compulsive disorder
- Anorexia nervosa
- Chronic pain
- Aggression disorders
- Affective disorders
- Huntington's disease
The IGT materials include the Professional Manual, a CD-ROM that includes the task itself, On-Screen Help, a laminated Administration Card, and a Quick Start Guide to help users with software installation and technical details.
Requirements: Windows® 2000/XP/Vista™; NTFS file system; CD-ROM drive for installation; Internet connection or telephone for software activation