Higher Risk Taking and Impaired Probability Judgment in Behavioral Addiction

Author:

Asaoka Yui1,Won Moojun2,Morita Tomonari2,Ishikawa Emi2,Goto Yukiori1

Affiliation:

1. Primate Research Institute, Kyoto University, Inuyama, Aichi, Japan

2. Kyowa Hospital, Obu, Aichi, Japan

Abstract

Abstract Background Accumulating evidence suggests that deficits in decision-making and judgment may be involved in several psychiatric disorders, including addiction. Behavioral addiction is a conceptually new psychiatric condition, raising a debate of what criteria define behavioral addiction, and several impulse control disorders are equivalently considered as types of behavioral addiction. In this preliminary study with a relatively small sample size, we investigated how decision-making and judgment were compromised in behavioral addiction to further characterize this psychiatric condition. Method Healthy control subjects (n = 31) and patients with kleptomania and paraphilia as behavioral addictions (n = 16) were recruited. A battery of questionnaires for assessments of cognitive biases and economic decision-making were conducted, as was a psychological test for the assessment of the jumping-to-conclusions bias, using functional near-infrared spectroscopy recordings of prefrontal cortical (PFC) activity. Results Although behavioral addicts exhibited stronger cognitive biases than controls in the questionnaire, the difference was primarily due to lower intelligence in the patients. Behavioral addicts also exhibited higher risk taking and worse performance in economic decision-making, indicating compromised probability judgment, along with diminished PFC activity in the right hemisphere. Conclusion Our study suggests that behavioral addiction may involve impairments of probability judgment associated with attenuated PFC activity, which consequently leads to higher risk taking in decision-making.

Funder

Kyoto University Foundation

Kyoto University Research Development Program

Institute of Seizon and Life Sciences

Japan Society for the Promotion of Science

Challenging Exploratory Research

Publisher

Oxford University Press (OUP)

Subject

Pharmacology (medical),Psychiatry and Mental health,Pharmacology

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