Home > The dynamics of addiction: craving versus self-control.

Grasman, Johan and Grasman, Raoul P P P and van der Maas, Han L J [PLOS One] . (2016) The dynamics of addiction: craving versus self-control. Public Library of Science. PLoS ONE, 11 (6)

URL: http://journals.plos.org/plosone/article?id=10.137...

This study deals with addictive acts that exhibit a stable pattern not intervening with the normal routine of daily life. Nevertheless, in the long term such behaviour may result in health damage. Alcohol consumption is an example of such addictive habit. The aim is to describe the process of addiction as a dynamical system in the way this is done in the natural and technological sciences. The dynamics of the addictive behaviour is described by a mathematical model consisting of two coupled difference equations. They determine the change in time of two state variables, craving and self-control. The model equations contain terms that represent external forces such as societal rules, peer influences and cues. The latter are formulated as events that are Poisson distributed in time. With the model it is shown how a person can get addicted when changing lifestyle.

Although craving is the dominant variable in the process of addiction, the moment of getting dependent is clearly marked by a switch in a variable that fits the definition of addiction vulnerability in the literature. Furthermore, the way chance affects a therapeutic addiction intervention is analysed by carrying out a Monte Carlo simulation. Essential in the dynamical model is a nonlinear component which determines the configuration of the two stable states of the system: being dependent or not dependent. Under identical external conditions both may be stable (hysteresis). With the dynamical systems approach possible switches between the two states are explored (repeated relapses).


Item Type:Evidence resource
Drug Type:Alcohol or other drugs in general
Intervention Type:AOD disorder
Source:PLOS One
Date:2016
Page Range:e0158323
Publisher:Public Library of Science
Volume:11
Number:6
EndNote:View
Subjects:F Concepts in psychology > Skills > Coping skills
F Concepts in psychology > Motivation
F Concepts in psychology > Attitude and behaviour
F Concepts in psychology > Non chemical addiction
J Health care, prevention and rehabilitation > Risk and protective factors > Risk factors

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