422; Rassool, 2009, p.7). Interaction of various factors including genes, hormones, past trauma as well as individualized patterns of drug exposure can determine susceptibility to sensitization leading to transition (Robinson & Berridge, 2003, p.38). Several models/theories have been coined to explain the use/misuse of alcohol and drugs by individuals. According to the moral model, a sinful person with weak morals chooses to become addicted against the established religious and social norms and it is their own willpower to change that can lead to recovery.
Probable biological causes are ignored (Rassool, 2009, p.35). Thus, the model implies that non-addictive responses are possible in people with strong moral character. Biological theories postulate that mechanisms present at birth and unique to an individual can generate drug use behaviour. Some individuals inherit genetic make-up that predisposes them to alcoholism and drug abuse as noted by the genetic theory (Rassool, 2009, p.36) while those that lack these genetic factors will have non-addictive responses.
Genetic loading can cause significantly higher prevalence of substance use problems in certain individuals, or groups in a population (Theories of Addiction, Chapter 3 p. 60). Disease theory maintains that addiction is brought on by a physiological or behavioural deficit or both rendering a person unable to tolerate the drug. If left untreated the disease can be progressive, incurable and fatal but the theory is insufficient in relating socio-cultural and psychological factors in compulsive substance use behaviour (Rassool, 2009, p.35). Psychological theories include ‘Freud’s’ psychoanalytical theory which relates substance use with conflicts such as unconscious death wishes, repressed sexuality within the ego leading to adaptive substance use (Rassool, 2009, p.37). People with inadequate personality issues such as low self-esteem are also more susceptible to drug use problems as explained by personality theory where personal traits and characteristics contribute to development and continuation of dependence (Rassool, 2009, p.39). Drugs are used as means to escape realities of life exemplified in peer rejection issues, parental neglect, physical and social stigmata, high achievement expectation, school failure, ego deficiencies, low coping abilities and mechanisms, and self-defeating (Theories of Addiction, p. 65). The theory implies that those with adequate personality will have non-addictive responses even if they used alcohol and drugs.
Behavioural theories view the use of psychoactive substances as acquired through classical and operant conditioning. In ‘Pavlovian’s’ classical conditioning dependence is acquired in associating particular drug use with specific factors such as a past drug-taking environment although, individual differences and social factors are not accounted for (Rassool, 2009, p.37-38). In Skinners operant conditioning, learning occurs when behaviour is followed by reinforcement in which positive reinforcement fixates behaviour on pleasurable sensations while negative reinforcement is to overcome the painful symptoms of withdrawal (Rassool, 2009, p.38). An alternative argument entails the opponent process which explains how people can continue to take psychoactive substances such as heroine to addiction even if they found it unpleasant to begin with, or can still take narcotics and feel the pleasurable effect but do not become compulsive users (Cantopher, 1999, p. 28-30). Social learning theory/cognitive social learning considers both past and present cognitive processes in understanding the effects of drug and alcohol use.
Adaptive/maladaptive behaviour is acquired and maintained by positive and negative reinforcement in group settings where the individual observes a role-model and gets the urge to conform (Rassool, 2009, p. 38). Drinking or drug use is done to cope with feelings of anxiety as explained by tension-reduction theory.
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