Assessment of explanatory models of mental illness: effects of patient and interviewer characteristics

Causal beliefs about mental illness: A scoping review

Research on causal beliefs about mental illness-the beliefs people hold about what causes a particular mental illness, or mental illnesses in general-is split across a number of theories and disciplines. Although research on this subject has provided a number of insights and practical applications, the diversity of theories, terminology, and keywords makes it challenging for a new reader to gain a comprehensive understanding. We sought to address this by conducting a systematic scoping review of research on causal beliefs. This review included English-language articles from any year that mentioned causal beliefs for mental illness in their title or abstract. We identified articles in two stages. In the first stage, we used a narrow set of search terms referring specifically to causal beliefs (1227 records identified, 417 included). In the second stage, we used a comprehensive set of terms relevant to research on causal beliefs (10,418 records identified, 3838 included). We analyzed articles qualitatively, organizing them into one of five theories or categories: the common-sense model of self-regulation, explanatory models, mental health literacy, biogenetic causal beliefs, and other research on causal beliefs. We provide a comprehensive summary of these literatures in terms of their history, typical research questions and study design, findings, and practical applications. These theories differ in their theoretical orientation towards causal beliefs, research methods, findings, and applications. However, they broadly share a view of causal beliefs as multifaceted, culturally determined, and relevant for additional psychosocial variables such as mental illness stigma and help-seeking. We conclude by making recommendations for researchers, clinicians, public health messaging, and for individuals with mental illness.

Perspectives of Community Nurses on Treatment Engagement of Persons with Severe Mental Illnesses (PwSMI): A Qualitative Study from South India

Background

There is increasing evidence of the need for treatment engagement between Persons with Severe Mental Illnesses (PwSMIs) and Mental Health Professionals (MHPs). This therapeutic process involves collaborative work between patients and MHPs, which improves the condition. Community nurses are uniquely positioned to facilitate this process as they act as the focal point of interaction between patients and the health system.

Methods

This qualitative study explored the community nurses' experiences in treatment engagement with PwSMI through eight group interviews of 35 community nurses from District Mental Health Programs (DMHPs) across Karnataka (South India) from February 2020 to March 2020. The audio recordings of the interviews were transcribed and coded to arrive at themes and subthemes.

Results

The major themes identified were factors influencing treatment engagement, strategies to tackle treatment nonengagement, and challenges in dealing with nonengagement. The reasons for nonengagement were lack of insight and lack of knowledge of sociocultural, logistic, and treatment-related factors. The DMHP teams contacted patients through phone calls, home visits, and liaisons with health workers and intervened with them through education and depot injections. The major challenges were difficulty conducting home visits, distances, the unavailability of medications, and the need for adequate infrastructure and human resources.

Conclusion

Community nurses address a few factors of nonengagement, such as insight, sociocultural factors, and treatment-related factors. Addressing the systemic challenges and adequate training of nurses in intervening in the dropped-out PwSMIs would help to reduce the treatment gap.

Cultural issues: Perspectives and experiences of patients with dissociative seizures in Argentina

PURPOSE

To explore patients' subjective experience when receiving a diagnosis of Dissociative Seizures (DS) in Buenos Aires, Argentina, and their explanatory models about DS.

METHOD

A qualitative approach using semi-structured interviews was used to gain an in-depth and contextual understanding of the perspectives of 19 patients with DS. Data collection and analysis were followed by an inductive and interpretive approach informed by the principles of thematic analysis.

RESULTS

Four main themes emerged: 1) Reactions to the Diagnosis; 2) Ways of Naming the Disease; 3) Own Explanatory Models; 4) External Explanatory Models.

CONCLUSIONS

This information might help achieve an adequate knowledge of the local characteristics of patients with DS. Most patients could not express any emotions or considerations about being diagnosed with DS, and they related their seizures to a personal or social-emotional conflict and environmental stress; however, family members related patients' seizures to a biological cause. It is important to analyze cultural differences in patients with DS in order to develop appropriate interventions for this specific population.

Explanatory Models and their Relationship with Drug Attitude in Patients with Depression in South India

BACKGROUND

The patient's understanding of the illness may mediate beliefs towards its treatment. There is a paucity of studies examining the relationships between these variables in depression. This study was conducted to know the relationships between explanatory models and attitude to medication in depression.

METHODS

494 patients with depression in remission were assessed with sociodemographic proforma, Drug Attitude Inventory, and Mental Distress Explanatory Model Questionnaire.

RESULTS

A favorable attitude toward medication was observed in 57.49% of participants. Mean scores on MDEMQ subscales Stress, Western Physiology, Non-Western Physiology, and Supernatural were 32.96, 21.87, 10.06, and 47.55, respectively. Statistically significant associations were found between attitude towards medication and the patient's marital status (more negative attitude with single status, χ2 = 11.72, df = 3, P = 0.008) and occupation (more negative attitude among unemployed patients, χ² = 4.17, df = 1, P = 0.041). The scores of explanatory models did not differ based on positive or negative drug attitude.

CONCLUSION

Though explanatory models are not linked to patient attitudes toward medication, patients who are single or unemployed have a negative attitude toward medications. Such negative attitude may impair compliance and worsen patient outcomes.

Screening Tools for Mental Disorders Among Female Refugees: a Systematic Review

Female refugees are particularly vulnerable to mental disorders but assessment may be complex and challenging. Various screening tools have been developed for this population, but little is known about their usefulness. The main aim is to examine the literature on the effectiveness of screening tools for mental health problems among female refugees. Systematic review of PubMed, PsycINFO and Embase to locate all published work. Comprehensive search terms were used and inclusion and exclusion criteria were formulated. The initial search yielded 877 articles, of which 757 were removed after titles and abstracts were reviewed. Then, 121 full-text versions of articles were examined and 96 excluded according to the criteria. A total of 25 articles were included in this systematic review in accordance with the PRIMSA guidelines. Twenty screening tools were evaluated. There is a lack of tools used to screen refugee women, and in particular those in emergency settings. Cultural factors may not be accounted for in the development of screening instruments. Further research in this field can help inform public health policies to address social, educational and occupational inclusion for refugee women in different contexts.

Explanatory Models for Mental Distress Among University Students in Ethiopia: A Qualitative Study

Background

Socio-culturally determined processes account for how individuals give meanings to health, illness, causal attributions, expectations from treatment, and related outcomes. There is limited evidence of explanatory models for mental distress among higher education institutions in Ethiopia. The objective of this study was to explore the explanatory models for mental distress among Wolaita Sodo University.

Methods

The current study used a phenomenological research approach, and we collected data from 21 students. The participants were purposively recruited based on eligibility criteria. Semi-structured interviews were conducted from December 2017 to January 2018 using the Short Explanatory Models Interview. The interviews were audio-recorded, transcribed into the Amharic language and translated into English. Data were analyzed using framework analysis with the assistance of open code software 4.02.

Results

Most students experienced symptoms of being anxious, fatigue, headaches and feelings of hopelessness. They labeled these symptoms like anxiety or stress. The most commonly reported causal explanations were psychosocial factors. Students perceived that their anxiety or stress was severe that mainly affected their mind, which in turn impacted their interactions with others, academic result, emotions and motivation to study. Almost all the students received care from informal sources, although they wanted to receive care from mental health professionals. They managed their mental distress using positive as well as negative coping strategies.

Conclusion

The policy implication of our findings is that mental health interventions in higher education institutions in Ethiopia should take into account the explanatory models of students’ psychological distress.

Patients' Explanatory Models about drug-resistant epilepsy in Argentina. A thematic analysis

OBJECTIVE

The aim of this study is to explore explanatory models (EM) about epilepsy in patients with drug-resistant epilepsy (DRE) in Buenos Aires, Argentina.

DESIGN

A qualitative approach gathered data through semi-structured interviews, oriented to gain an in-depth and contextual understanding of EM about epilepsy of patients with DRE. Data collection and analysis were followed by an inductive and interpretive approach informed by the principles of thematic analysis.

RESULTS

75 patients from two public hospitals participated. Emerging codes were grouped into three categories: Biomedical EM, Psychosocial EM, and Traditional EM. Also, factors that trigger or increase the frequency of seizures were reported.

CONCLUSIONS

Patients' EM regarding epilepsy are complex, as biological, psychological, and supernatural aspects intertwine. EM represent a method of understanding the way people explain, recognize, and act in relation to a medical condition. Since patients' beliefs regarding their illness are related to mental disorders, and quality of life, EM could shed light on the real impact of illness in the life of people, and, in turn, guide those intervention strategies to the patients' subjectivity, in order to improve the treatment compliance, reduce distress, and improve health-related quality of life, among other aspects.

Explanatory models and help-seeking for symptoms of PTSD and depression among Syrian refugees

OBJECTIVE

This study investigates how Syrian refugees explain and prefer to seek help for symptoms of post-traumatic stress disorder (PTSD) and depression.

METHODS

We conducted five semi-structured focus group interviews based on a vignette-technique with Syrian refugees (n = 21 men, n = 10 women). The vignettes describe a fictional person suffering from symptoms of PTSD or depression in line with DSM-5 and ICD-10 criteria.

RESULTS

Despite never mentioning PTSD, participants in the PTSD-interviews recognized the symptoms. They perceived them as a common reaction to extreme situations, mainly the war, the flight, and post-migratory stressors. Depression was labeled as either depression or feelings caused by social problems, and the participants were more hesitant to identify with these symptoms. Despite some differences, both the PTSD and depression vignettes were explained in terms of situational explanatory models and externally caused stress. The main finding is how participants described changing stressors resulting from migration and resettlement leading to a difference in how they would seek help in Syria and in Norway. Specifically, we found that preferred help-seeking and coping strategies are contextual.

CONCLUSIONS

These findings point to the need to consider transformations following forced migration when studying aspects of explanatory models, preferred help-seeking, and coping strategies in refugee groups.

Differential executive functioning in the topology of Spirit possession or dissociative disorders: an explorative cultural study

BACKGROUND

In Oman, anecdotal and impressionistic observation have helped parse and categorize various manifestations of spirit possession into two broad and distinct categories: intermittent dissociative phenomenon and transitory dissociative phenomenon. The primary aim of the present study was to compare the performance of participants on neuropsychological tests among different grades of possession. Other correlates were also sought.

METHODS

Assessment criteria for the two groups included measures examining executive functioning: controlled oral word association test Verbal Fluency, Wisconsin Card Sorting Test (Perseverative error and the number of categories achieved), Trail Making Test and the Tower of London Test (number of correctly solved problems). Sociodemographic variables and the history of trauma were also sought.

RESULT

Among 84 participants, one third of them presented the intermittent possession type and two thirds, the transitory possession type. Their mean age was 34.17 ± 11.82 and 56% of them were female. Nearly 35% of them endorsed a history of a traumatic experience. Both the multivariate models showed statistical significance (F (5, 78) = 5.57, p < 0.001, R² = 0.22), F (5, 78) = 11.38, p < 0.001, R² = 0.39) with an independent predictor of intermittent dissociative phenomenon (β = - 3.408, p < 0.001), (β = 63.88, p < 0.001) for Verbal Fluency and Trail Making Test, respectively. The history of the traumatic event was also statistically significant with the results of the Trail Making Test (β = - 26.01, p < 0.041. Furthermore, the subtype of Pathogenic Possession turned out to be an independent predictor across all models: Wisconsin Card Sorting Test perseverative error, Wisconsin card sorting test categories achieved and the number of problems solved in the Tower of London Test (OR = 3.70, 95% C.I. 2.97-4.61; p < 0.001), (OR = 0.57, 95% C.I.0.39-0.84; p = 0.004) and (OR = 0.80, 95% C.I. 0.65-0.99; p < 0.037) respectively.

CONCLUSIONS

This study suggests that typology of spirit possession found in Oman tends to differ on indices of executive function. Those with 'diagnosis' of intermittent possession showed impairment in many indices of executive functioning. Despite its wide prevalence, spirit possession has not been examined in terms of its neuropsychological functioning. We believe that this study will be instrumental in laying the groundwork for a more robust methodology.

Assessing explanatory models and health beliefs: An essential but overlooked competency for clinicians

Explanatory models of illness – the way people perceive, interpret and respond to it – are mediated not only by the illness itself, but also by cultural and social contexts. This article discusses recent evidence showing how the exploration of explanatory models can help to shape treatment and outcomes for some of the most common categories of mental illness, and presents case studies illustrating dilemmas clinicians face when their explanatory models differ from those of their patients. It concludes with recommendations on how a culturally sensitive clinical approach based on the exploration of explanatory models during assessment and treatment can be used as an effective way of dealing with the complexity of patients' and families' needs.

Learning Objectives

• Appreciate the use of explanatory models in clinical practice

• Understand the relevance of explanatory models in relation to specific diagnostic categories of mental illness

• Recognise that dilemmas may arise if the explanatory models of the clinician and the patient differ, and be able to manage this tension

How aging individuals with schizophrenia experience the self-etiology of their illness: a reflective lifeworld research approach

OBJECTIVE

In recent years, there are an increasing number of individuals with schizophrenia who are aging within the general society. Self-etiology of the illness refers to its causal attributions by this population as part of the life review process. The aim of this paper is to develop knowledge from the perspective of older people with schizophrenia regarding the self-etiology of their illness. Focusing on the self-etiology of this particular population is useful, to enhance the understanding of their lived experience in the context of their lifeworld.

METHOD

The study was carried out using the reflective lifeworld phenomenological approach. In-depth semi-structured interviews were conducted with 18 aging individuals with schizophrenia followed by analysis for meaning.

RESULTS

Five major constituents of the phenomenon under study - the experience of self-etiology among aging people with schizophrenia - emerged from the findings: 'It leaves you to your fate' - schizophrenia as a decree of fate; 'I have sinned against God' - schizophrenia as a punishment from God; 'They put something in my coffee' - schizophrenia as a result of witchcraft; 'Her genes are in me' - schizophrenia as genetic; and 'She left me and that's how I got sick' - schizophrenia as a result of personal trauma.

CONCLUSIONS

The findings show that self-etiology in old age tends to be stable, externally attributed and culturally oriented, and serves as a central component in the life review process. This is relevant for professionals developing intervention methods for aging people with schizophrenia.

Explanations of illness experiences among community mental health patients: an argument for the use of an ethnographic interview method in routine clinical care

Cultural variations in perceptions of mental distress are important issues for healthcare. They can affect communication between patients and professionals and may be a root cause for misdiagnosis, patient disengagement, and disparities in access, outcomes and overall experiences of treatment by patients. Taking into account patients' explanatory models (EMs) of mental distress is fundamental to patient-centred care, and improved outcomes. This paper reports on the outcomes from the Cultural Consultation Service, commissioned in an inner-city London borough. We used a narrative-based ethnographic method of assessment, in which community mental health patients referred for a cultural consultation were interviewed using Barts Explanatory Model Inventory and Checklist (BEMI) to assess the EMs of their mental distress. Patients mainly attributed the causes and consequences of their mental distress to emotional and psychological factors, which were inextricably linked to existing social concerns and interpersonal issues. Desired solutions mainly focused on treatment, social, and systemic interventions. We found that using BEMI could contribute to a comprehensive assessment in routine care and can be used by professionals within a short timeframe and with minimal training. Ethnographic assessment method captures patients' EMs and illness experiences, opening the way for patient-centred interventions and potentially better outcomes and experiences.

Psychological characteristics of religious delusions

PURPOSE

Religious delusions are common and are considered to be particularly difficult to treat. In this study we investigated what psychological processes may underlie the reported treatment resistance. In particular, we focused on the perceptual, cognitive, affective and behavioural mechanisms held to maintain delusions in cognitive models of psychosis, as these form the key treatment targets in cognitive behavioural therapy. We compared religious delusions to delusions with other content.

METHODS

Comprehensive measures of symptoms and psychological processes were completed by 383 adult participants with delusions and a schizophrenia spectrum diagnosis, drawn from two large studies of cognitive behavioural therapy for psychosis.

RESULTS

Binary logistic regression showed that religious delusions were associated with higher levels of grandiosity (OR 7.5; 95 % CI 3.9-14.1), passivity experiences, having internal evidence for their delusion (anomalous experiences or mood states), and being willing to consider alternatives to their delusion (95 % CI for ORs 1.1-8.6). Levels of negative symptoms were lower. No differences were found in delusional conviction, insight or attitudes towards treatment.

CONCLUSIONS

Levels of positive symptoms, particularly anomalous experiences and grandiosity, were high, and may contribute to symptom persistence. However, contrary to previous reports, we found no evidence that people with religious delusions would be less likely to engage in any form of help. Higher levels of flexibility may make them particularly amenable to cognitive behavioural approaches, but particular care should be taken to preserve self-esteem and valued aspects of beliefs and experiences.

Culture and psychiatric evaluation: operationalizing cultural formulation for DSM-5

The Outline for Cultural Formulation (OCF) introduced with DSM-IV provided a framework for clinicians to organize cultural information relevant to diagnostic assessment and treatment planning. However, use of the OCF has been inconsistent, raising questions about the need for guidance on implementation, training, and application in diverse settings. To address this need, DSM-5 introduced a cultural formulation interview (CFI) that operationalizes the process of data collection for the OCF. The CFI includes patient and informant versions and 12 supplementary modules addressing specific domains of the OCF. This article summarizes the literature reviews and analyses of experience with the OCF conducted by the DSM-5 Cross-Cultural Issues Subgroup (DCCIS) that informed the development of the CFI. We review the history and contents of the DSM-IV OCF, its use in training programs, and previous attempts to render it operational through questionnaires, protocols, and semi-structured interview formats. Results of research based on the OCF are discussed. For each domain of the OCF, we summarize findings from the DCCIS that led to content revision and operationalization in the CFI. The conclusion discusses training and implementation issues essential to service delivery.

Main topics in transcultural psychiatric research in the Netherlands during the past decade

The population of the Netherlands has become increasingly diverse in terms of ethnicity and religion, and anti-immigrant attitudes have become more apparent. At the same time, interest in issues linked to transcultural psychiatry has grown steadily. The purpose of this article is to describe the most important results in Dutch transcultural psychiatric research in the last decade and to discuss their relationship with relevant social and political developments in the Netherlands. All relevant PhD theses (N = 27) between 2000 and 2011 were selected. Screening of Dutch journals in the field of transcultural psychiatry and medical anthropology and a PubMed query yielded additional publications. Forensic and addiction psychiatry were excluded from this review. The results of the review indicate three main topics: (a) the prevalence of psychiatric disorders and their relation to migration issues as social defeat and ethnic density, showing considerable intra- and interethnic differences in predictors and prevalence rates, (b) the social position of refugees and asylum seekers, and its effect on mental health, showing especially high risk among asylum seekers, and (c) the patterns of health-seeking behaviour and use of mental health services, showing a differentiated picture among various migrant groups. Anthropological research brought additional knowledge on all the above topics. The overall conclusion is that transcultural psychiatric research in the Netherlands has made a giant leap since the turn of the century. The results are of international importance and invite redefinition of the relationship between migration and mental health, and reconsideration of its underlying mechanisms in multiethnic societies.

A lay carer's story about epilepsy in an urban South African context: they call it an illness of falling or an illness of fitting because a person shakes and eventually falls

In South Africa, epilepsy is poorly understood and managed. The different cultural understandings and terms used to explain the condition across the diverse population groups exacerbate this problem. In this article, we describe the findings from a single story about epilepsy which we elicited through a semistructured interview guide in the respondents' natural setting. We used Kleinman and Benson's mini-ethnographic questions to explore the lay carer's explanatory models about epilepsy. Our respondent had different descriptors for epilepsy which include 'an illness of falling', 'an illness of fitting', and 'a thing'. His explanatory models concerning epilepsy were predominantly sociocultural, psychological, economical, and political in nature and were supported by personal examples from his past and present experiences. Key to this man's story is the reality of a strong cultural base of understanding epilepsy, with the added reality of an urbanized world in which people feel alienated from one another and do not necessarily share the same cultural beliefs and practices. Instead of viewing understandings of epilepsy as either 'traditional' or 'western', community-based health promotion interventions must therefore recognize both cultural issues and urban realities and should also incorporate approaches that foster a common ground for patients and carers with very diverse views. The findings of this one interview cannot be generalized but have implications for managing epilepsy in an urban African context.

Race of Interviewer Effect on Disclosures of Suicidal Low-Income African American Women

Few studies have investigated the impact of interviewer race on the results gleaned through psychological assessment. African American and European American clinical evaluators conducted face-to-face interviews with 161 low-income African American women seeking services at an inner-city hospital following a suicide attempt. Participants were administered measures related to various current life stressors, including the Survey for Recent Life Events, which assesses various forms of daily hassles, and the Index of Spouse Abuse, which taps both physical and nonphysical intimate partner violence (IPV). Multivariate analyses of variance revealed a significant difference on the participants’ reports of daily hassles and IPV to African Americanand European American evaluators. With regard to overall life stress, African American women reported higher levels of total life stress, time pressure stress, social acceptability stress, and social victimization to African American than in European American–led interviews. They also endorsed higher levels of both physical and nonphysical IPV to interviewers of the same race as themselves as compared with interviewers from a different racial background. There were no group differences in terms of work stress, sociocultural differences, and finances. The findings underscore the saliency of interviewer race as a source of nonrandom measurement error capable of influencing statistical results. Implications of ignoring race of interviewer effects in analysis are explored and suggestions are offered in terms of culturally responsive assessment processes.

Direct and indirect assessment of explanatory models of illness

Patients' self-reports of explanatory models (EMs) are sensitive to distortions, particularly as a result of social desirability, uncertainty towards one's own beliefs, and ethnic disparities with the interviewer. In contrast, reaction-time-based indirect measures are thought to be less sensitive to such factors. This article reports on two studies that applied direct (interview) and indirect (reaction-time-based association task) measures of EMs. Study 1 found evidence for the convergent validity of the direct and indirect measures, indicating that the two measures were essentially related. Furthermore, social desirability and uncertainty towards one's beliefs affected the association between the measures on two categories of EMs. Study 2 showed that, unlike the self-reports of EMs, indirect measures were less sensitive to the ethnicity of the interviewer. The nature of the indirect measure, and the construct that it measures, are discussed.

The role of health systems factors in facilitating access to psychotropic medicines: a cross-sectional analysis of the WHO-AIMS in 63 low- and middle-income countries

BACKGROUND

Neuropsychiatric conditions comprise 14% of the global burden of disease and 30% of all noncommunicable disease. Despite the existence of cost-effective interventions, including administration of psychotropic medicines, the number of persons who remain untreated is as high as 85% in low- and middle-income countries (LAMICs). While access to psychotropic medicines varies substantially across countries, no studies to date have empirically investigated potential health systems factors underlying this issue.

METHODS AND FINDINGS

This study uses a cross-sectional sample of 63 LAMICs and country regions to identify key health systems components associated with access to psychotropic medicines. Data from countries that completed the World Health Organization Assessment Instrument for Mental Health Systems (WHO-AIMS) were included in multiple regression analyses to investigate the role of five major mental health systems domains in shaping medicine availability and affordability. These domains are: mental health legislation, human rights implementations, mental health care financing, human resources, and the role of advocacy groups. Availability of psychotropic medicines was associated with features of all five mental health systems domains. Most notably, within the domain of mental health legislation, a comprehensive national mental health plan was associated with 15% greater availability; and in terms of advocacy groups, the participation of family-based organizations in the development of mental health legislation was associated with 17% greater availability. Only three measures were related with affordability of medicines to consumers: level of human resources, percentage of countries' health budget dedicated to mental health, and availability of mental health care in prisons. Controlling for country development, as measured by the Human Development Index, health systems features were associated with medicine availability but not affordability.

CONCLUSIONS

Results suggest that strengthening particular facets of mental health systems might improve availability of psychotropic medicines and that overall country development is associated with affordability.

Supernatural beliefs, aetiological models and help seeking behaviour in patients with schizophrenia

BACKGROUND

Few studies have evaluated the supernatural beliefs of patients with schizophrenia. This study aimed to study the personal beliefs, aetiological models and help seeking behaviour of patients with schizophrenia using a self-rated questionnaire.

MATERIALS AND METHODS

Seventy three patients returned the completed supernatural Attitude questionnaire.

RESULTS

62% of patients admitted that people in their community believed in sorcery and other magico-religious phenomena. One fourth to half of patients believed in ghosts/evil spirit (26%), spirit intrusion (28.8%) and sorcery (46.6%). Two-third patients believed that mental illness can occur either due to sorcery, ghosts/evil spirit, spirit intrusion, divine wrath, planetary/astrological influences, dissatisfied or evil spirits and bad deeds of the past. 40% of the subjects attributed mental disorders to more than one of these beliefs. About half of the patients (46.6%) believed that only performance of prayers was sufficient to improve their mental status. Few patients (9.6%) believed that magico-religious rituals were sufficient to improve their mental illness but about one-fourth (24.7%) admitted that during recent episode either they or their caregivers performed magico-religious rituals.

CONCLUSION

Supernatural beliefs are common in patients with schizophrenia and many of them attribute the symptoms of mental disorders to these beliefs.