Capacity to Consent in Healthcare: A Systematic Review and Meta-Analysis Comparing Patients with Bipolar Disorders and Schizophrenia Spectrum Disorders.

Background: Mental capacity is a fundamental aspect that enables patients to fully participate in various healthcare procedures. To assist healthcare professionals (HCPs) in assessing patients' capacity, especially in the mental health field, several standardized tools have been developed. These tools include the MacArthur Competence Assessment Tool for Treatment (MacCAT-T), the MacArthur Competence Assessment Tool for Clinical Research (MacCAT-CR), and the Competence Assessment Tool for Psychiatric Advance Directives (CAT-PAD). The core dimensions explored by these tools include Understanding, Appreciation, Reasoning, and Expression of a choice. Objective: This meta-analysis aimed to investigate potential differences in decision-making capacity within the healthcare context among groups of patients with bipolar disorders (BD) and schizophrenia spectrum disorders (SSD). Methods: A systematic search was conducted on Medline/Pubmed, and Scopus. Additionally, Google Scholar was manually inspected, and a manual search of emerging reviews and reference lists of the retrieved papers was performed. Eligible studies were specifically cross-sectional, utilizing standardized assessment tools, and involving patients diagnosed with BD and SSD. Data from the studies were independently extracted and pooled using random-effect models. Hedges' g was used as a measure for outcomes. Results: Six studies were identified, with three studies using the MacCAT-CR, two studies the MacCAT-T, and one the CAT-PAD. The participants included 189 individuals with BD and 324 individuals with SSD. The meta-analysis revealed that patients with BD performed slightly better compared to patients with SSD, with the difference being statistically significant in the domain of Appreciation (ES = 0.23, 95% CI: 0.01 to 0.04, p = 0.037). There was no statistically significant difference between the two groups for Understanding (ES = 0.09, 95% CI:-0.10 to 0.27, p = 0.352), Reasoning (ES = 0.18, 95% CI: -0.12 to 0.47, p = 0.074), and Expression of a choice (ES = 0.23, 95% CI: -0.01 to 0.48, p = 0.60). In the sensitivity analysis, furthermore, when considering only studies involving patients in symptomatic remission, the difference for Appreciation also resulted in non-significant (ES = 0.21, 95% CI: -0.04 to 0.46, p = 0.102). Conclusions: These findings indicate that there are no significant differences between patients with BD and SSD during remission phases, while differences are minimal during acute phases. The usefulness of standardized assessment of capacity at any stage of the illness should be considered, both for diagnostic-therapeutic phases and for research and advance directives. Further studies are necessary to understand the reasons for the overlap in capacity between the two diagnostic categories compared in this study.

What it is like to be manic: a response to Director.

In a recent article, Director makes the case that many individuals with bipolar disorder have the capacity to consent to many decisions while acutely manic, even when those decisions are out of character and cause harm. Referring to recent qualitative evidence, I argue that Director overlooks a key mechanism of manic incapacity, an inflexible experience of the future that impairs one's ability to value. Without attention to the illness-specific experience of decision-making, capacity assessments risk false negatives in people with mania.

Ditching decision-making capacity.

Decision-making capacity (DMC) plays an important role in clinical practice-determining, on the basis of a patient's decisional abilities, whether they are entitled to make their own medical decisions or whether a surrogate must be secured to participate in decisions on their behalf. As a result, it is critical that we get things right-that our conceptual framework be well-suited to the task of helping practitioners systematically sort through the relevant ethical considerations in a way that reliably and transparently delivers correct verdicts about who should and should not have the authority to make their own medical decisions. Unfortunately, however, the standard approach to DMC does not get things right. It is of virtually no help in identifying and clarifying the relevant ethical considerations. And, embedded in the prevailing anti-paternalist paradigm, DMC assessments obfuscate and distort the underlying ethical justification for granting or withholding decisional authority. Here, we describe the core commitments of the standard approach to DMC and then highlight three problems with it. We then argue that these problems are significant enough that they call for more than merely tinkering and fine-tuning; variations of the standard approach cannot adequately address them. Instead, we should ditch DMC.

Competence for physician-assisted death of patients with mental disorders: theoretical and practical considerations.

Physician-assisted death (PAD) of patients whose suffering does not stem from terminal conditions has become more prevalent during the last few decades. This paper is focused on decision-making competence for PAD, specifically in situations in which PAD is related solely to psychiatric illness. First, a theoretical analysis presents the premises for the argument that competence for physician-assisted death for psychiatric patients (PADPP) should be determined based on a higher threshold in comparison to the required competence for conventional medical interventions. Second, the higher threshold for decision-making competence for PADPP is illustrated. Third, several real PADPP cases are critically discussed, as an illustration to decision-making competence evaluations that would not have met the higher standard. Finally, a short summary of practical suggestions regarding the assessment of decision-making competence for PADPP is presented. Psychiatrists are called to address the ethical, legal, societal and clinical challenges related to PADPP and should be prepared for its probable expansion.

[Cognition in medical residents with and without anxiety in a specialist training hospital]. / Cognición en médicos residentes con y sin ansiedad en un hospital formador de especialistas.

Background: The resident doctor plays an important role in people's health care. Objective: To compare the cognition of medical residents with/without anxiety in a specialist training hospital. Material and methods: Comparative, prospective, cross-sectional study. Medical residents of any grade and specialty were included, who signed informed consent. Those with a diagnosis of cognitive impairment were excluded, and who did not complete the tests were eliminated. AMAS-A test was applied to assess anxiety and NEUROPSI: Attention and memory test for cognitive characteristics. Mann-Whitney's U and Spearman's rho were used, p≤0.05 was considered significant. Results: 155 residents were evaluated, 55.5% men, mean age 32.4 years. Internal Medicine was the predominant specialty (25.2%). AMAS-A identified 94.19% residents with anxiety. NEUROPSI reported Attention and memory domain (38.7%) in normal classification, Memory (34.2%) in high normal, and Attention and executive functions (32.3%) in severe alteration as predominant assessments. Only Memory showed a significant difference between residents with and without anxiety (p=0.015). Attention and executive functions-Physiological anxiety (r=-0.21, p=0.009) and Attention and memory-Social concern (r=-0.268, p=0.001) correlations were significant. Conclusions: The percentage of anxiety and cognitive alterations in residents physicians is high. Anxiety decisively affects memory capacity in these medical doctors.

Introducción: el médico residente desempeña un papel importante en la atención a la salud de los pacientes. Objetivo: comparar la cognición de médicos residentes con y sin ansiedad en un hospital formador de especialistas. Material y métodos: estudio comparativo, prospectivo, transversal, en médicos residentes de cualquier grado y especialidad, que firmaron consentimiento informado. Se excluyeron aquellos con diagnóstico de alteración cognitiva y se eliminaron los que no completaron las pruebas realizadas. Se aplicaron AMAS-A para evaluar ansiedad y NEUROPSI: Atención y memoria para características cognitivas. Se utilizaron U de Mann-Whitney, y rho de Spearman. Se consideró significativa una p ≤ 0.05. Resultados: se evaluaron 155 residentes, 55.5% hombres, edad media 32.4 años. Medicina Interna fue la especialidad predominante (25.2%). Se identificó ansiedad en el 94.19% de los residentes. Predominaron los dominios Atención y memoria en clasificación normal (38.7%), Memoria en normal-alto (34.2%) y Atención y funciones ejecutivas en alteración severa (32.3%). Memoria mostró diferencia significativa entre residentes con y sin ansiedad (p = 0.015). Las correlaciones de Atención y funciones ejecutivas-Ansiedad fisiológica (r = -0.21, p = 0.009) y Atención y memoria-Preocupación social (r = -0.268, p = 0.001) resultaron significativas. Conclusiones: el porcentaje de ansiedad y alteraciones cognitivas en residentes es alto. La ansiedad afecta decisivamente la capacidad de memoria en estos médicos.

Response to commentaries: 'autonomy-based criticisms of the patient preference predictor'.

The authors respond to four JME commentaries on their Feature Article, 'Autonomy-based criticisms of the patient preference predictor'.

Teenager and the transplant: how the case of William Verden highlights action is needed to optimise equitable access to organs for patients with impaired decision-making.

In February 2022, the Court of Protection was faced with the question of whether a kidney transplant was in the best interests of William Verden. The case highlighted the legal, ethical and clinical complexities of treating potential kidney transplant patients with impaired decision-making. Above all, it exposed the potential risk of discrimination on the basis of disability when treatment decisions in relation to potential kidney recipients with impaired capacity are being made. In this paper, we draw on the Verden case to (1) examine the role of the Court of Protection in cases relating to patients with impaired decision-making capacity who require a transplant, (2) to highlight the lack of empirical data on patients who have faced inequitable access to transplant and (3) highlight the shortcomings of the existing legal and regulatory framework in England and Wales guiding clinical decision making for patients in William's position. We consequently argue that there is a clear need for action to ensure equitable access to transplant for those in William's position. Furthermore, we suggest that there is a responsibility incumbent on policy makers and clinicians alike to develop a meaningful, and meaningfully operational, framework centred on preventing discrimination against potential organ recipients based on their decision-making capacity.

Older adults sex offender: Five case series in a Brazilian population.

Sexual assault perpetrated by older adults is still an underreported crime and is not fully understood. To describe a series of cases of sexual assault by Brazilian older adults and discuss the associated factors based on the literature. This is a cross-sectional descriptive analysis of five cases of older adults accused of sexual assault in the Forensic Psychiatry sector of the Medical Legal Institute (Coroner's Office) in the City of Belo Horizonte'. This review focuses on five cases involving male defendants with a mean age of 59.75 years; two with previous psychiatric treatment, and one with a previous criminal record. Their victims were prepubescent children, four of them female. Psychiatric conditions related to forensic diagnosis included dementia, schizophrenia, alcohol-related substance use disorder, paraphilia, and one without a psychiatric diagnosis. The final forensic report on all five cases found that two of the older adults diagnosed with a mental disorder in two were considered to have a mental illness that completely impaired the cognitive and volitional domains; two other adults were diagnosed with mental health disturbance that partially impaired these domains; and the last adult was diagnosed and found without mental health impairment. While the incidence of sexual crimes committed by older adults is low, the absolute number of cases has expected to rise due to population aging. Assessing the factors related to this type of crime is therefore an initial step to understanding and formulating preventive strategies.

Waiting for guardianship in a public hospital geriatric inpatient unit: a mixed methods observational case series.

BACKGROUND: Patients in acute hospital settings waiting for guardianship and financial management (FM) hearings experience extended length of stay (LOS), with known consequences for frail elderly. This, together with universal agreement that substitute decision-making is a last resort measure, an imperative exists to examine guardianship and FM applications made from within hospital for geriatric inpatients. AIMS: This study aims to examine processes around Guardianship applications in a public hospital Geriatric inpatient setting including times to, reasons for and outcomes of referral; and to explore the content of the medical records in relation to criteria for application. METHOD: This was a mixed methods observational case series using descriptive data supplemented by qualitative case-note analysis of inpatients referred for guardianship (with/without FM) from 2018 to 2020 in a New South Wales Geriatric Medicine inpatient unit. Medical records were examined for evidence of operationalised criteria for guardianship, aligned with disability, capacity and need/risk common to most Australian jurisdictions. RESULTS: Of 45 patients with guardianship applications, 98% were granted guardians and 33 of 37 (89%) FM applications. Multiple risks underpinned applications, most commonly frequent falls (49%) and medication mismanagement (49%). Although only 29% were in receipt of services preadmission, 98% were discharged to residential care. Average hospital LOS was 70 days (interquartile range, 35), contributed to by delays between admission and decision to apply for guardianship/FM (median, 28 inpatient days) and uncertainties around or lack of documented capacity assessments. CONCLUSION: This study identifies potential points along pathways towards guardianship in hospital settings, which might be targeted to streamline if not divert some of these applications. Points of intervention include at initiation of applications, with consideration of alternatives to substitute decision-making by addressing patient needs and using supported decision-making, while improving clinician understanding of capacity assessment and guardianship.

Capacidad e internamiento involuntario de pacientes con anorexia nerviosa: un estudio cualitativo sobre percepciones y actuación de psiquiatras y psicólogos clínicos / Competence and Involuntary Commitment of Patients with Anorexia Nervosa: A Qualitative study on the Perceptions and Performance of Psychiatrists and Clinical Psychologists

RESUMEN Introducción: La anorexia nerviosa plantea un importante problema bioético, ya que los pacientes, a menudo, rechazan el tratamiento a pesar del peligro que ello supone para su salud, y no está claro que su decisión sea autónoma. El objetivo de este trabajo es investigar las percepciones/actuación de psiquiatras y psicólogos clínicos ante la capacidad y el internamiento involuntario de pacientes con anorexia nerviosa. Métodos: Se entrevistó a 7 psiquiatras, 4 psicólogas clínicas y 1 psicóloga residente de tercer año. Se utilizó un enfoque de investigación cualitativa basado en la teoría fundamentada. Resultados: El análisis de datos mostró que estos profesionales articulan la atención del paciente en torno a una categoría principal, a saber, el internamiento como último recurso y la búsqueda de la voluntariedad, lo que implica un cambio en la dinámica asistencial habitual. En torno a esa categoría central, se erigen algunos conceptos importantes; estrés de rol, coerción informal, peso, familia y cronicidad. Conclusiones: La dificultad de conciliar demandas profesionales puede suponer un menoscabo en la calidad de la asistencia y en la propia satisfacción laboral, lo que pone en evidencia la necesidad de reflexionar e investigar sobre los fundamentos de las atribuciones asumidas.

ABSTRACT Introduction: Anorexia nervosa poses an important bioethical quandary, since patients often refuse treatment despite the danger that this poses to their health, and it is not clear that their decision is autonomous. The aim of this study was to investigate the perceptions/performance of psychiatrists and clinical psychologists regarding the capacity and involuntary hospitalisation of patients with anorexia nervosa. Methods: Seven psychiatrists, four clinical psychologists, and one third-year resident psychologist were interviewed. A qualitative research approach based on grounded theory was used. Results: The data analysis showed that these professionals articulate patient care around one main category - hospitalisation as a last resort and the search for voluntariness, which implies a change in the usual healthcare dynamics. Around this central category, some important concepts emerge: role stress, informal coercion, weight, family and chronicity. Conclusions: The difficulty of reconciling professional demands can undermine the quality of care and job satisfaction itself, which highlights the need for reflection and research into the foundations of the responsibilities assumed.

Competence and Involuntary Commitment of Patients with Anorexia Nervosa: A Qualitative study on the Perceptions and Performance of Psychiatrists and Clinical Psychologists.

INTRODUCTION: Anorexia nervosa poses an important bioethical dilemma, since patients often refuse treatment despite the danger that this poses to their health, and it is not clear that their decision is autonomous. The aim of this study was to investigate the perceptions/performance of psychiatrists and clinical psychologists regarding the capacity and involuntary hospitalisation of patients with anorexia nervosa. METHODS: Seven psychiatrists, four clinical psychologists, and one third-year resident psychologist were interviewed. A qualitative research approach based on grounded theory was used. RESULTS: The data analysis showed that these professionals articulate patient care around one main category - hospitalisation as a last resort and the search for voluntariness, which implies a change in the usual healthcare dynamics. Around this central category, some important concepts emerge: role stress, informal coercion, weight, family and chronicity. CONCLUSIONS: It is concluded that the difficulty of reconciling professional demands can undermine the quality of care and job satisfaction itself, which highlights the need for reflection and research into the foundations of the responsibilities assumed.

Mental health professionals' attitudes towards mental competency and involuntary commitment in anorexia nervosa: Construction, validation and results of the ACINOVAN questionnaire.

INTRODUCTION: Anorexia nervosa is a serious disorder that causes high rates of morbidity and mortality. Involuntary treatments are only legally admissible if the patient is not competent. However, assessing their capacity can be really complex. This implies that the final decision can be influenced by the individual attitudes of the physician. OBJECTIVE: To create and empirically validate a questionnaire in Spanish that makes it possible to measure the attitude towards capacity and involuntary commitment and compare between categorical groups. METHODS: The sample consisted of 338 mental health professionals. The items were validated by groups of experts. An exploratory factor analysis and group comparisons were carried out. RESULTS: Favourable evidence was obtained of a 13-item model consisting of three factors: pro-intervention, lack of competence and chronicity. Professionals tend to believe in the lack of capacity and the need for involuntary interventions, as well as differential suitability due to chronicity. Support prior to involuntary interventions was significantly related to the pro-intervention and absence of capacity factors, and training in bioethics to chronicity. CONCLUSIONS: The resulting instrument is valid and reliable. Its use can be useful to professionals, patients and society.

Actitudes de los profesionales de la salud mental ante la capacidad y el internamiento no voluntario en anorexia nerviosa: construcción, validación y resultados del cuestionario ACINOVAN / Mental Health Professionals' Attitudes Towards Mental Competency and Involuntary Commitment in Anorexia Nervosa: Construction, Validation and Results of the Acinovan Questionnaire

RESUMEN Introducción: La anorexia nerviosa es un trastorno grave que causa tasas elevadas de morbilidad y mortalidad. La aplicación de una intervención no voluntaria solo es legalmente admisible si el paciente no es competente. Sin embargo, la evaluación de su capacidad puede ser extremadamente compleja. Ello conlleva que la decisión final pueda verse influida por las actitudes individuales del facultativo. Objetivo: Crear y validar empíricamente un cuestionario en español que permita medir la actitud hacia la capacidad y el internamiento no voluntario y comparar entre grupos categóricos. Métodos: Formaron la muestra 338 profesionales de salud mental. Los ítems fueron validados por grupos de expertos. Se realizaron un análisis factorial exploratorio y comparaciones grupales. Resultados: Se obtuvo un modelo de 13 ítems formado por 3 factores: prointervención, ausencia de capacidad y cronicidad. Los profesionales tienden a creer en la ausencia de capacidad y la necesidad de la intervención no voluntaria, así como en la idoneidad diferencial en virtud de la cronicidad. El respaldo previo a intervenciones involuntarias se relacionó significativamente con los factores prointervención y ausencia de capacidad y la formación en bioética, con la cronicidad. Conclusiones: El instrumento resultante es válido y fiable. Puede ser útil a profesionales, pacientes y sociedad.

ABSTRACT Introduction: Anorexia nervosa is a serious disorder that causes high rates of morbidity and mortality. Involuntary treatments are only legally admissible if the patient is not competent. However, assessing their capacity can be really complex. This implies that the final decision might be influenced by the individual attitudes of the physician. Objective: To create and empirically validate a questionnaire in Spanish that makes it possible to measure the attitude towards capacity and involuntary commitment and compare between categorical groups. Methods: The sample consisted of 338 mental health professionals. The items were validated by groups of experts. An exploratory factor analysis and group comparisons were carried out. Results: Favourable evidence was obtained of a 13-item model consisting of three factors: pro-intervention, lack of capacity and chronicity. Professionals tend to believe in the lack of capacity and the need for involuntary interventions, as well as differential suitability due to chronicity. Having ever supported involuntary interventions was significantly related to the pro-intervention and lack of capacity factors, and training in bioethics to chronicity. Conclusions: The resulting instrument is valid and reliable. Its use can be useful to professionals, patients and society.

Should Assessments of Decision-Making Capacity Be Risk-Sensitive? A Systematic Review.

Background: The concept of decision-making capacity (DMC) or competence remains controversial, despite widespread use. Risk-sensitive DMC assessment (RS-DMC)-the idea that the higher the risk involved in a decision, the greater the decisional abilities required for DMC-has been particularly controversial. We conducted a systematic, descriptive review of the arguments for and against RS-DMC to clarify the debate. Methods: We searched PubMed/MEDLINE (National Library of Medicine), PsycInfo (American Psychological Association) and Philpapers, updating our search to February 15th, 2022. We targeted peer-reviewed publications in English that argue for or against RS-DMC. Two reviewers independently screened the publications and extracted data from each eligible manuscript. Results: Of 41 eligible publications, 22 supported a risk-sensitive threshold in DMC assessment. Most arguments for RS-DMC rely on its intuitive appeal and practical merits. The arguments against RS-DMC primarily express concerns about paternalism and the seeming asymmetry between consent and refusal; critics of RS-DMC support epistemic, rather than substantive (i.e., variable threshold), risk-sensitivity; counterarguments responding to criticisms of RS-DMC address charges of paternalism and exhibit a notable variety of responses to the issue of asymmetry. Authors used a variety of frameworks regarding the definition of DMC, its elements, and its relation to decisional authority, and these frameworks were significantly associated with positions on RS-DMC. A limitation of our review is that the coding relies on judgment and interpretation. Conclusion: The review suggests that some of the debate about RS-DMC stems from differences in underlying frameworks. Most defenses of RS-DMC rely on its intuitive appeal, while most criticisms reflect concerns about paternalism or the asymmetry between consent and refusal. Defenses of RS-DMC respond to the asymmetry problem in a variety of ways. Further research is needed on the implications of underlying frameworks, the asymmetry problem, and the distinction between epistemic and substantive models of RS-DMC.

Risk-relativity is still a nonsense.

In this short response to Gray's article Capacity and Decision Making we double down on our argument that risk-relativity is a nonsense. Risk relativity is the claim that we should set a higher standard of competence for a person to make a risky choice than to make a safe choice. Gray's response largely involves calling attention to the complexities, ramifications and multiple value implications of decision-making, but we do not deny any of this. Using the notion of quality of care mentioned by Gray, we construct an argument that might be used to support risk relativity. But it is no more persuasive than the arguments put forward by risk-relativists.

Risk-related standards of competence are a nonsense.

If a person is competent to consent to a treatment, is that person necessarily competent to refuse the very same treatment? Risk relativists answer no to this question. If the refusal of a treatment is risky, we may demand a higher level of decision-making capacity to choose this option. The position is known as asymmetry. Risk relativity rests on the possibility of setting variable levels of competence by reference to variable levels of risk. In an excellent 2016 article in Journal of Medical Ethics (JME), Rob Lawlor defends asymmetry of this kind by defending risk relativity, using and developing arguments and approaches found in earlier work such as that of Wilks. He offers what we call the two-scale approach: a scale of risk is to be used to set a standard of competence on a scale of decision-making difficulty. However, can this be done in any rational way? We argue it cannot, and in this sense, and to this extent, risk relativity is a nonsense.

Evaluation of the MCAST, a multidisciplinary toolkit to improve mental capacity assessment.

PURPOSE: To evaluate the usability and acceptability of the Mental Capacity Assessment Support Toolkit (MCAST) in healthcare settings and whether its use was associated with increased legal compliance and assessor confidence. MATERIALS AND METHODS: A mixed methods convergence triangulation model was used. Multidisciplinary professionals used the MCAST during mental capacity assessments for UK hospital patients with diagnoses of stroke or acute or chronic cognitive impairment. Changes in legal compliance were investigated by comparing scores on case note audits before and after implementation of the MCAST. Changes in assessor confidence and professionals' perceptions of the MCAST's usability and acceptability were explored using surveys. Patients' and family members' views on acceptability were determined using semi-structured interviews. Data were integrated using triangulation. RESULTS: Twenty-one professionals, 17 patients and two family members participated. Use of the MCAST was associated with significant increases in legal compliance and assessor confidence. Most professionals found the MCAST easy to use and beneficial to their practice and patients. Patients and family members found the MCAST materials acceptable. CONCLUSIONS: The MCAST is the first toolkit to support the needs of individuals with communication disabilities during mental capacity assessments. It enables assessors to deliver high quality, legally compliant and confident practice.IMPLICATIONS FOR REHABILITATIONMental capacity assessment practice needs to be improved to maximise patient autonomy, safety and well-being.The MCAST is a paper-based toolkit designed to facilitate and improve mental capacity practice in England and Wales.This study suggests the MCAST would be easy and acceptable to use in healthcare settings and could lead to improvements in assessment quality and assessor confidence.

The Validity and Reliability of the Turkish Version of MacArthur Competence Assessment Tool for Treatment Decision: Correlates of Competence in Schizophrenia Patients.

INTRODUCTION: Informed consent is an indispensable condition of the clinical practice for the provision of health care. The main objective of this study is to translate the MacArthur competence assessment tool for treatment (MacCAT-T) into Turkish and evaluate the validity and reliability of the Turkish version in schizophrenia patients and healthy control subjects. METHODS: In this cross-sectional study, 30 hospitalized schizophrenia patients and 25 healthy subjects were assessed with MacCAT-T, Mental Competence Evaluation Form for Assessment of Competency (MCEF), Positive and Negative Syndrome Scale, Beck Depression Inventory, Mini Mental State Examination, Wechsler Adult Intelligence Scale (WAIS) - Similarities subtest and the Schedule for Assessing the Three Components of Insight. Psychometric properties of MacCAT-T were examined by intra-class correlation coefficients and Cronbach's alpha values. RESULTS: Intra-class correlations ranged between 0.83 and 0.99 for four subscales of the tool. Cronbach alpha value of MacCAT-T was found 0.89. Severity of psychopathology and indices of insight were found to be negatively correlated with the subscales of the tool. WAIS-Similarities subtest scores were found to be positively correlated with understanding and reasoning subscales of MacCAT-T. CONCLUSION: The Turkish version of MacCAT-T is a valid and reliable instrument for Turkish patients. The severity of psychopathology, insight and executive functions were shown to be significantly related to the decision making capacity in patients with schizophrenia.