Robert Michael Bagby (born 1953) is a Canadian psychologist, senior clinician scientist and director of clinical research at the Centre for Addiction and Mental Health (CAMH). He is a full professor in the Department of Psychiatry, University of Toronto. [1] He became a full professor of psychology at the University of Toronto Scarborough campus in July 2011.
Early research interests revolved around psychology and the law having been educated as a forensic psychologist. He also brought awareness to the personality construct alexithymia by developing the Toronto Alexithymia Scale (TAS-20) to measure its qualities. [2] [3] [4] [5] With the revision of the MMPI-2, Bagby was significantly involved in validating test scores, with a specific focus on being able to identify individuals feigning and/or malingering mental illness. [6] [7] [8] More recently, he has investigated the possibility that Five factor model personality facets could be used to identify many psychiatric conditions with a focus on dimensional versus a categorical approaches that the DSM-IV takes and the newer DSM-5 is said to emphasize. [9] [10] [11] [12]
Psychological testing refers to the administration of psychological tests. Psychological tests are administered or scored by trained evaluators. A person's responses are evaluated according to carefully prescribed guidelines. Scores are thought to reflect individual or group differences in the construct the test purports to measure. The science behind psychological testing is psychometrics.
In psychology, trait theory is an approach to the study of human personality. Trait theorists are primarily interested in the measurement of traits, which can be defined as habitual patterns of behavior, thought, and emotion. According to this perspective, traits are aspects of personality that are relatively stable over time, differ across individuals, are relatively consistent over situations, and influence behaviour. Traits are in contrast to states, which are more transitory dispositions.
The Minnesota Multiphasic Personality Inventory (MMPI) is a standardized psychometric test of adult personality and psychopathology. A version for adolescents also exists, the MMPI-A, and was first published in 1992. Psychologists and other mental health professionals use various versions of the MMPI to help develop treatment plans, assist with differential diagnosis, help answer legal questions, screen job candidates during the personnel selection process, or as part of a therapeutic assessment procedure.
Alexithymia, also called emotional blindness, is a neuropsychological phenomenon characterized by significant challenges in recognizing, expressing, feeling, sourcing, and describing one's emotions. It is associated with difficulties in attachment and interpersonal relations. There is no scientific consensus on its classification as a personality trait, medical symptom, or mental disorder.
In trait theory, the Big Five personality traits are a group of five characteristics used to study personality:
A spectrum disorder is a disorder that includes a range of linked conditions, sometimes also extending to include singular symptoms and traits. The different elements of a spectrum either have a similar appearance or are thought to be caused by the same underlying mechanism. In either case, a spectrum approach is taken because there appears to be "not a unitary disorder but rather a syndrome composed of subgroups". The spectrum may represent a range of severity, comprising relatively "severe" mental disorders through to relatively "mild and nonclinical deficits".
Somatosensory amplification (SSA) is a tendency to perceive normal somatic and visceral sensations as being relatively intense, disturbing and noxious. It is a common feature of hypochondriasis and is commonly found with fibromyalgia, major depressive disorder, anxiety disorders, autism spectrum disorder, and alexithymia. One common clinical measure of SSA is the Somatosensory Amplification Scale (SSAS).
Amplification is a judged tendency of a person to amplify physical symptoms based on negative psychological factors such as anxiety or depression. A distinct interpretation of amplification could be sensory processing disorder involving differences in the way a person reacts to sensory input, a symptom associated autism spectrum disorder. An indicidual’s psychological state has been documented to affect the course of upper respiratory tract infection, post-infectious irritable bowel syndrome, and musculoskeletal pain. Amplification is not recognized by the American Psychiatric Association.
The Beck Anxiety Inventory (BAI) is a formative assessment and rating scale of anxiety. This self-report inventory, or 21-item questionnaire uses a scale ; the BAI is an ordinal scale; more specifically, a Likert scale that measures the scale quality of magnitude of anxiety.
Functional disorders are a group of recognisable medical conditions which are due to changes to the functioning of the systems of the body rather than due to a disease affecting the structure of the body.
Hospital Anxiety and Depression Scale (HADS) was originally developed by Zigmond and Snaith (1983) and is commonly used by doctors to determine the levels of anxiety and depression that a person is experiencing. The HADS is a 14-item scale, with seven items relating to anxiety and seven relating to depression. Zigmond and Snaith created this outcome measure specifically to avoid reliance on aspects of these conditions that are also common somatic symptoms of illness, for example fatigue and insomnia or hypersomnia. This, it was hoped, would create a tool for the detection of anxiety and depression in people with physical health problems.
Somatic symptom disorder, also known as somatoform disorder or somatization disorder, is defined by one or more chronic physical symptoms that coincide with excessive and maladaptive thoughts, emotions, and behaviors connected to those symptoms. The symptoms are not deliberately produced or feigned, and they may or may not coexist with a known medical ailment.
Jon Elhai is Distinguished Professor of clinical psychology at the University of Toledo. Elhai is known for being an expert in the assessment and diagnosis of Posttraumatic stress disorder (PTSD), forensic psychological assessment of PTSD, and detection of fabricated/malingered PTSD; as well as in internet addictions.
Because of the substantial benefits available to individuals with a confirmed PTSD diagnosis, which causes occupational impairment, the distinct possibility of false diagnoses exist, some of which are due to malingering of PTSD. Post-traumatic stress disorder (PTSD) is a mental disorder that may develop after an individual experiences a traumatic event. Malingering of PTSD consists of one feigning the disorder. In the United States, the Social Security Administration and the Department of Veterans Affairs each offer disability compensation programs that provide benefits for qualified individuals with mental disorders, including PTSD. These benefits can be substantial, making them attractive for those seeking financial gain. Concerns about individuals exploiting benefits can lead to restricted access to these resources, inadvertently making it more difficult for those with PTSD who genuinely need assistance to receive it. Malingering can lead to a decline in research and subsequent treatment for PTSD as it interferes with true studies. False data skews findings, making it more difficult to develop effective treatments. Insurance fraud may also come about through malingering, burdening the economy, healthcare systems, and taxpayers.
The Psychopathic Personality Inventory (PPI-Revised) is a personality test for traits associated with psychopathy in adults. The PPI was developed by Scott Lilienfeld and Brian Andrews to assess these traits in non-criminal populations, though it is still used in clinical populations as well. In contrast to other psychopathy measures, such as the Hare Psychopathy Checklist (PCL), the PPI is a self-report scale, rather than an interview-based assessment. It is intended to comprehensively index psychopathic personality traits without assuming particular links to anti-social or criminal behaviors. It also includes measures to detect impression management or careless responding.
The Toronto Alexithymia Scale is a measure of deficiency in understanding, processing, or describing emotions. It was developed in 1986 and later revised, removing some of the items. The current version has twenty statements rated on a five-point Likert scale.
In medicine, insomnia is measured using the Athens insomnia scale. It was introduced in the year 2000 by a group of researchers from Athens, Greece to assess the insomnia symptoms in patients with sleep disorders.
The Somatic Symptom Scale - 8 (SSS-8) is a brief self-report questionnaire used to assess somatic symptom burden. It measures the perceived burden of common somatic symptoms. These symptoms were originally chosen to reflect common symptoms in primary care but they are relevant for a large number of diseases and mental disorders. The SSS-8 is a brief version of the popular Patient Health Questionnaire - 15 (PHQ-15).
The Structured Inventory of Malingered Symptomatology (SIMS) is a 75-item true-false questionnaire intended to measure malingering; that is, intentionally exaggerating or feigning psychiatric symptoms, cognitive impairment, or neurological disorders.
The Hierarchical Taxonomy Of Psychopathology (HiTOP) consortium was formed in 2015 as a grassroots effort to articulate a classification of mental health problems based on recent scientific findings on how the components of mental disorders fit together. The consortium is developing the HiTOP model, a classification system, or taxonomy, of mental disorders, or psychopathology, aiming to prioritize scientific results over convention and clinical opinion. The motives for proposing this classification were to aid clinical practice and mental health research. The consortium was organized by Drs. Roman Kotov, Robert Krueger, and David Watson. At inception it included 40 psychologists and psychiatrists, who had a record of scientific contributions to classification of psychopathology The HiTOP model aims to address limitations of traditional classification systems for mental illness, such as the DSM-5 and ICD-10, by organizing psychopathology according to evidence from research on observable patterns of mental health problems.