The Iowa gambling task is a psychological task thought to simulate real-life decision-making.It was introduced by Bechara, Damasio, Tranel and Anderson (1994), then researchers at the University of Iowa. It has been brought to popular attention by Antonio Damasio, proponent of the Somatic Marker Hypothesis and author of Descartes' Error. The task is sometimes known as Bechara's Gambling Task, and is widely used in research of cognition and emotion.

1. Iowa Gambling Experiment
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3. Iowa Gambling Experiment Meaning
4. Iowa Gambling Experiment

In Experiment 1, 4 age groups (6-9, 10-12, 13-15 and 18-25 years olds) performed 2 versions of a computerized variant of the original Iowa gambling task under 3 different feedback conditions (no feedback, global feedback, and option-specific feedback) and completed the Raven Standard Progressive Matrices as an index of inductive reasoning ability.

The original Iowa Gambling Task studies decision making using a cards. The participant needs to choose one out of four card decks (named A,B,C, and D). The participant can win or loose money with each card. The task was designed by Bechera and colleagues, 1994. Lakeside Casino. The only riverboat casino in Iowa that sits in a lake, Lakeside Casino offers slot machines and table games. American Wagering operates the William Hill sportsbook. Address: 777 Casino Drive, Osceola, IA 50213. Telephone: 877-477-5253. The Iowa Gambling Task (Figure I) was developed to assess and quantify the decision-making defects of neurological patients by simulating real-life decision in conditions of reward and punishment and of uncertainty, and to investigate the SMH further.

Participants are presented with 4 virtual decks of cards on a computer screen. They are told that each time they choose a card they will win some game money. Every so often, however, when they choose a card they will win money, but will also lose some money too. The goal of the game is to win as much money as possible. Every card drawn will earn the participant a reward ($100 for Decks A and B; $50 for Decks C and D). Occasionally, a card will also have a penalty (A and B have an total penalty of $1250 for every ten cards; C and D have a total penalty of $250 for every ten cards). Thus, A and B are 'bad decks', and C and D are 'good decks', because Decks A or B will lead to losses over the long run, and Decks C or D will lead to gains. Deck A differs from B and Deck C differs from D in the number of trials over which the losses are distributed: A and C have five smaller loss cards for every ten cards; B and D have one larger loss card for every ten cards.

Most healthy participants sample cards from each deck, and after about 40 or 50 selections are fairly good at sticking to the good decks. Patients with orbitofrontal cortex (OFC) dysfunction, however, continue to perseverate with the bad decks, sometimes even though they know that they are losing money overall. Concurrent measurement of galvanic skin response shows that healthy participants show a 'stress' reaction to hovering over the bad decks after only 10 trials, long before conscious sensation that the decks are bad. By contrast, patients with OFC dysfunction never develop this physiological reaction to impending punishment. Bechara and his colleagues explain this in terms of the somatic marker hypothesis. The Iowa gambling task is currently being used by a number of research groups using fMRI to investigate which brain regions are activated by the task in healthy volunteers as well as clinical groups with conditions such as schizophrenia and obsessive compulsive disorder.

Iowa Gambling Experiment

References[edit edit source]

Bechara A, Damasio AR, Damasio H, Anderson SW (1994). Insensitivity to future consequences following damage to human prefrontal cortex. Cognition, 50: 7-15.

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External links[edit edit source]

Iowa Gambling Experiment Game

A free implementation of the Iowa Gambling task is available as part of the PEBL Project[1]

Iowa Gambling Experiment Meaning

Iowa Gambling Experiment