Final answer:
Dependent personality disorder is linked to a higher risk of substance abuse due to tendencies towards compulsive drug use despite adverse consequences. Personality characteristics such as depression and anxiety may also contribute to substance abuse.
Step-by-step explanation:
When considering which psychological or personality factor is likely to predispose an individual to medication abuse, dependent personality disorder is one of the conditions associated with a higher risk of substance use disorders. According to the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5), individuals with this disorder may have a compulsive pattern of drug use despite negative consequences and the presence of both physical and psychological dependence. Moreover, addiction and dependence have been statistically linked to certain personality characteristics including depression, anxiety, and neuroticism, which are factors that may also contribute to substance abuse.