Malingering is the dishonest and intentional production of symptoms. It can cause considerable difficulty as assessment runs counter to normal practice, and it may expose clinicians to testing medicolegal situations. In this first part of a two-article review, we explore types of psychiatric malingering and their occurrence across a range of common and challenging scenarios, discussing presentations that may help delineate true from feigned illness. A framework is provided for undertaking an assessment where malingering is suspected, including recommendations on clinician approach, the use of collateral information, and self-evaluation of biases. The uses, and limitations, of psychometric tests are discussed, including ‘general’, malingering-specific and ‘symptom validity’ scales.

Bipolar disorder is a common mental disorder that can be challenging to diagnose. This brief article outlines how bipolar disorder is diagnosed and how it can be distinguished from other disorders with similar phenotypes.

We review thought disorder in psychopathology, including how one can assess it clinically, useful psychometric measures and its clinical importance. In the final section we discuss how recent studies in neuropsychology and neuroimaging have helped understand the mechanisms of abnormal speech and languages in psychotic illnesses.

A number of studies have noted an association between being the victim of bullying and psychotic symptoms. We offer an overview of the topic, focusing especially on a developmental perspective. We highlight the results of the latest studies on psychosis across the continuum and its relationship with bullying. Then we summarise the three main explanatory models investigated: developmental, biological and cognitive. We recommend that bullying in psychosis requires careful study of the developmental trajectories involved, and that research should now focus on how personal, social and biological factors interact.

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.

Highly active antiretroviral therapy (HAART) has led to a reduction in HIV-related morbidity and mortality, and the life expectancy of HIV-positive individuals has improved significantly. It is therefore becoming more likely that clinicians will encounter patients with psychiatric manifestations of the disease. This review summarises the evidence on prevalence, manifestations and treatment of psychiatric conditions in HIV-positive adults. The most prevalent psychiatric illness in this population is depression (35.6%), followed by substance misuse, anxiety, psychosis, adjustment disorder and bipolar affective disorder. Neurocognitive impairment is also common, ranging in severity from asymptomatic (the most frequent) to dementia (the least frequent). Effective treatment of both HIV and psychiatric manifestations is essential to maximising life expectancy and quality of life.

This article outlines the rationale for dedicated specialist services for high-risk young people about whom there may be family or professional concerns in relation to mental disorder. It provides an overview of the development and remit of such services and emphasises the need for them to form part of overall service provision for children and young people.

Carer stress is well documented, especially in those caring for individuals with dementia. A recommendation of all national dementia strategies is to provide excellent support and information to informal carers of people with dementia. NICE guidance suggests that a range of tailored interventions, including psychological input, psychoeducation and training courses, should be offered to reduce caregiver burden and stress, although good-quality outcome-based evidence is lacking. On the basis of a narrative review of the literature, we describe individual and multicomponent carer support packages and discuss their evidence base, reflecting on outcomes for carers. Multicomponent interventions have the best evidence for effectiveness.

Although the older adult population makes up only a small percentage of mentally disordered offenders, there is a clear need for forensic mental health services for older people. However, these services to date have developed ad hoc and with no coordination. In this article we discuss the evolution, current provision, future direction and therapeutic implications of such services. Although the epidemiology, criminology and clinical characteristics of older people are sufficiently different from those of younger people to warrant such service specificity, we suggest that the provision of care should be geared to services based on older people's multiple and complex needs, rather than on arbitrary age cut-offs.

In this second part of a two-article review on malingering we consider the challenges of presenting clinical and psychometric findings. Numerous clinical and demographic factors are statistically associated with malingering but applying them to an individual case risks challenges to the expert psychiatric witness's evidence. Although psychometric data can usefully help strengthen or challenge a diagnosis, expert witnesses must recognise and report the limitations of these tests. We recommend that psychiatric expert witnesses do not try to look for or to link any external incentives with clinical findings, and indeed we suggest that they should, other than exceptionally, avoid using the term ‘malingering’. It is the job of the court, not the expert witness, to ascertain an individual's credibility and motives. We suggest a framework for presenting expert psychiatric evidence in this area.

This article examines the concept of moral responsibility in psychopathy. In doing so it shows how philosophical ideas can be used to help approach a complex issue in psychiatry. Building on a fictitious case, we explore two arguments: the exempting view, which proposes that psychopaths lack any ability to function as moral agents; and the mitigating view, which concedes that there are impairments in moral understanding in psychopathy, but takes these to be insufficient to be completely exempting, instead concluding that such individuals are at least partially morally responsible. Typically, clinicians (and the courts) are more comfortable with a mitigating view, whereas philosophers tend to extol an exempting view. Through discussion of the case, we illustrate the value that philosophy brings to clinical psychiatry and the ways in which psychiatry can enrich philosophical debate.

The discovery of conditions resulting from the expansion of unstable trinucleotide repeats, with their neuropsychiatric presentations crossing the boundaries of different specialties, provides ample opportunity for research and liaison work between medical and psychiatric subspecialties. Clinicians’ awareness of the presentations and genetic basis of these conditions improves management strategies and the quality of life of patients and their carers.

Hyperprolactinaemia is a common endocrine disorder that can be associated with significant morbidity. Antipsychotic medications are frequently linked to hyperprolactinaemia. This disorder usually presents as menstrual problems in women and sexual problems in men, which affect the patients' quality of life and adherence to antipsychotic treatment. In the past, treatment for hyperprolactinaemia was recommended only for symptomatic patients. However, it has become clear that persistent asymptomatic hyperprolactinaemia can be associated with long-term physical morbidities such as osteoporosis and possibly breast cancer. Hence, it is imperative that hyperprolactinaemia is managed even if asymptomatic when initially detected. This article discusses the various management options, such as reducing the dose of antipsychotic medication, switching to a prolactin-sparing antipsychotic and adding aripiprazole to the treatment regimen.

Functional near-infrared spectroscopy (fNIRS) has been used in healthcare and medical research for the past two decades. In particular, the use of fNIRS in academic and clinical psychiatry has increased rapidly owing to its advantages over other neuroimaging modalities. fNIRS is a tool that can potentially supplement clinical interviews and mental state examinations to establish a psychiatric diagnosis and monitor treatment progress. This article provides a review of the theoretical background of fNIRS, key principles of its applications in psychiatry and its limitations, and shares a vision of its future applicability in psychiatric research and clinical practice.

Statutory wills are made under the Mental Capacity Act 2005 (MCA) for persons who lack testamentary capacity. Mental health practitioners are likely to be familiar with many of the provisions of the MCA and the test for testamentary capacity. However, they may not have encountered statutory wills. This article explains the procedure for applying for a statutory will, including the role of medical practitioners. Salient legal cases are summarised to highlight the difficulties in applying a best interests framework for decision-making in the context of statutory wills. Finally, this article considers how the United Nations Convention on the Rights of Persons with Disabilities (CRPD) might affect not only on statutory wills, but also the wider provisions of the MCA.

Parity of esteem means valuing mental health as much as physical health in order to close inequalities in mortality, morbidity or delivery of care. There is clear evidence that patients with mental illness receive inferior medical, surgical and preventive care. This further exacerbated by low help-seeking, high stigma, medication side-effects and relatively low resources in mental healthcare. As a result, patients with severe mental illness die 10–20 years prematurely and have a high rate of cardiometabolic complications and other physical illnesses. Many physical healthcare guidelines and policy recommendations address parity of esteem, but their implementation to date has been poor. All clinicians should be aware that inequalities in care are adversely influencing mental health outcomes, and managers, healthcare organisations and politicians should provide resources and education to address this gap.

We argue that current debates about attention-deficit hyperactivity disorder (ADHD) can be considered afresh using an evolutionary lens. We show how the symptoms of ADHD can often be considered adaptive to their specific environment. We suggest that, from an evolutionary point of view, ADHD symptoms might be understood to result from an ‘evolutionary mismatch’, in which current environmental demands do not fit with what evolution has prepared us to cope with. For example, in our ancestral environment of evolutionary adaptedness (EEA), children were not expected to sit still and concentrate on academic tasks for many hours a day. Understanding ADHD in terms of such a ‘mismatch’ raises significant issues regarding the management of childhood ADHD, including ethical ones. An approach based on the concept of mismatch could provide an alternative to current debates on whether ADHD results from nature or nurture and whether it is under- or over-diagnosed. It would allow clinicians and policy makers to take both the child and the environment into account and consider what might be desirable and feasible, both in society and for specific children, to lessen the mismatch.

This overview considers causes of disordered eating, including eating disorders, in older people. Eating disorders are becoming more common in older adults and research has shown a related mortality of 21%. The wide range of medical and pharmacological causes of weight loss in older people means that eating disorders may go undetected, occurring insidiously and surreptitiously.

Health Education England's 2014 report Broadening the Foundation Programme has led to a rapid increase in the number of psychiatry placements for foundation doctors. This will have implications for existing psychiatrists in that they will start to teach, train and supervise foundation doctors. This article outlines how to develop high-quality foundation posts and how to support doctors in meeting the foundation curriculum competencies, which include experience of working in multidisciplinary teams and developing communication skills. The knowledge and skills gained in psychiatry placements will be valuable to all doctors, no matter what their future career intentions.