Analysis of malingered psychological symptoms in a clinical sample for early detection in initial interviews

Malingering consists of the production of false physical or psychological symptoms motivated by external incentives that are normally reproduced in pathologies that are not related to organic origin or there are no laboratory tests for their diagnosis, as is the case of mixed anxiety–depressive disorder and fibromyalgia syndrome. The objective of this research consisted of comparing the profile of simulative patients with fibromyalgia and mixed anxiety–depressive disorder to obtain a profile and facilitate its detection in initial interviews. The research was carried out with 78 patients (42 patients with fibromyalgia and 36 patients with mixed anxiety–depressive disorder) who were administered the professional's structured clinical judgment, the Beck Depression Inventory, the State-Trait Anxiety Questionnaire, and the Structured Symptom Simulation Inventory. The main obtained results show that the simulation classification proposed by the questionnaire is in the range of 66.67–80% with regard to coinciding with the judgment of experts, and people with suspicion of simulation of both groups of patients present similar characteristics. The simulators thus present incongruous responses in relation to the questionnaires, and high levels of trait anxiety, state, and depression predict the simulation of symptoms.