Oleg N. Medvedev

Oleg N. Medvedev
The University of Waikato · School of Psychology

PhD

About

129
Publications
59,608
Reads
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1,172
Citations
Introduction
My research focuses on protective and risk factors associated with psychological health and healthy brain aging covering areas of mindfulness-based interventions, psychopathology, well-being and advanced statistical methodology such as Rasch analysis, network analysis and generalisability theory. Generally, I am interested in psychophysiological mechanisms that can be utilized as drug free treatments for psychological health conditions and for improvement of health and well-being.
Additional affiliations
July 2017 - present
University of Auckland
Position
  • Research Associate
June 2012 - June 2017
Auckland University of Technology
Position
  • Lecturer
Description
  • Advanced and Introductory Research Methods, Brain and Behaviour, Psychological Assessment, Biopsychology and Introduction to Psychology papers.
June 2011 - September 2017
Auckland University of Technology
Position
  • Researcher
Education
October 2014 - June 2017
Auckland University of Technology
Field of study
  • Psychology and Health

Publications

Publications (129)
Article
Full-text available
The Mindful Attention Awareness Scale (MAAS) is the most widely used mindfulness scale to date, with validity studies indicating acceptable reliability and convergent validity. However, recent evidence indicates that the ability of the MAAS items to precisely discriminate between mindfulness levels is compromised. To improve item functioning and pr...
Article
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Understanding the relationships between individual offenders’ crime locations and their prior activity locations is important to enable individual level predictions to support crime prevention and investigation strategies. This study examined a wider range of crimes and activity locations than included in previous studies, to determine whether offe...
Article
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Objectives People conceptualize their identities, in part, by their social roles. We defined the construct of “selfing” as excessive identification with a social role. This over-identification may influence feelings of psychological stress; research to understand this theorized association requires reliable and valid measurement of the selfing cons...
Article
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Objectives The Interpersonal Mindfulness Scale (IMS) was recently developed to assess the qualities of mindfulness relevant to interpersonal interactions. The objective of the current study was to create a valid and reliable short-form version from the existing 27-item IMS. Methods Rasch modeling methods were used to evaluate a 17-item version and...
Article
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Background Prioritizing the maintenance of healthy cognitive aging and personalizing preventive interventions to enhance their effectiveness is crucial as the global population ages. Systemic inflammation and depression in older people have been associated with decreased levels of cognition but results have been inconsistent. Aims To explore the i...
Article
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Objectives Evaluating comprehensive reliability of the Vietnamese Self-Compassion Scale (VSCS) and its ability to distinguish between trait (stable) vs state (dynamic) aspects of self-compassion using Generalisability Theory (G-Theory) is necessary. This investigation contributes to both reliability and validity of research that uses the VSCS to me...
Article
Pregnancy-related anxiety has been linked to many maternal and child-related negative outcomes. However, there is an absence of free, well-validated screeners for this condition. The Pregnancy-related Anxiety Scale–Screener (PrAS-Screener) was evaluated using robust Rasch methodology. This study also aimed to develop a shorter version to meet the n...
Preprint
Successful psychopathy is characterized by core traits of callousness and interpersonal manipulation associated with clinical definitions of psychopathy, whilst largely being successful or adaptive in daily life. Despite rising interest in the field, the construct is still not well understood, partially due to competing theoretical models and the l...
Article
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This study investigated the relationship between fear of COVID-19, previous exposure to COVID-19, perceived vulnerability to disease, sleep quality, and psychological distress among healthcare workers (HCWs) in Taif city in Saudi Arabia, which has a population of 702,000 people. A cross-sectional study design was adopted. HCWs (n = 202) completed a...
Article
Background The 10-item Edinburgh Postnatal Depression Scale (EPDS) is a widely used depression measure with acceptable psychometric properties, but it uses ordinal scaling that has limited precision for assessment of outcomes in clinical and research settings. This study aimed to apply Rasch methodology to examine and enhance psychometric propertie...
Article
As depression is common in older people and confers significant risk for dementia, its accurate assessment is essential. The 15-item Geriatric Depression Scale (GDS-15) is a widely used assessment tool for measuring depression in aged populations, and its psychometric properties have been recently improved using Rasch analysis. However, its tempora...
Article
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Standard laboratory memory tests must use new sets of words for every new trial to be valid and establishing reliably of such tests is an ongoing challenge due to limitations of commonly used methods. Generalizability Theory is the robust method to examine the overall reliability that permits simultaneous examination of multiple error sources and t...
Article
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Objectives Investigating protective and risk factors associated with depressive and anxious symptoms in youth is important. The current cross-sectional study aimed to explore the unique contributions of modifiable protective and risk factors associated with depressive and anxious tendencies and to identify the most important variables of this sympt...
Article
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This study developed and tested a new geographic profiling method for automating suspect prioritisation in crime investigations. The Geographic Profiling Suspect Mapping And Ranking Technique (GP‐SMART) maps suspects' activity locations available in police records—such as home addresses, family members' home addresses, prior offence locations, loca...
Article
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Objectives The commentary offers a critical examination of the suggestion that religious or spiritual identity moderates the impact of mindfulness-based practices. Method The critical examination of Hunt et al. (Mindfulness, 12(11), 2743–2753, 2021) by surveying problems in research methodology and interpretation of the results. Results Several m...
Article
Purpose of review: Artificial intelligence and its division machine learning are emerging technologies that are increasingly applied in medicine. Artificial intelligence facilitates automatization of analytical modelling and contributes to prediction, diagnostics and treatment of diseases. This article presents an overview of the application of ar...
Article
Objective This study aimed to investigate psychometric properties and enhance precision of the 16-item Informant Questionnaire on Cognitive Decline in the Elderly (IQCODE-16) up to interval-level scale using Rasch methodology. Design Partial Credit Rasch model was applied to the IQCODE-16 scores using longitudinal data spanning 10 years of biennia...
Article
The personality construct known as 'Successful Psychopathy' has attracted the interests of researchers and clinicians alike. The concept suggests an individual who demonstrates the core traits associated with psychopathy but is able to adapt and function within society to prototypical or superior standards. There has yet to be a sound theoretical m...
Article
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The WHOQOL-BREF is a widely used 26-item self-report measure of Quality of Life (QOL), but there is lack of research investigating to what extent it measures dynamic (state) and stable (trait) aspects of QOL. Generalizability Theory is the most suitable method to examine the state-trait distinction and to evaluate the overall reliability and genera...
Article
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Objectives Quantitative research on the psychological effects of lockdown conditions during the COVID-19 pandemic is needed to inform mental health interventions which aim to alleviate potential adverse effects. The goal of this study was to investigate psychological distress during the lockdown in New Zealand.Methods We implemented a longitudinal...
Article
Background A major issue in evaluating the cognitive status of ageing populations is a clear distinction between enduring and dynamic aspects of global cognition necessary for evaluating risks of dementia and effectiveness of preventive interventions. Materials and methods Generalizability Theory was applied to investigate dynamic and enduring asp...
Article
Background Longitudinal neuroimaging provides spatiotemporal brain data (STBD) measurement that can be utilised to understand dynamic changes in brain structure and/or function underpinning cognitive activities. Making sense of such highly interactive information is challenging, given that the features manifest intricate temporal, causal relations...
Article
Accurate distinction between state and trait anxiety is necessary for assessment and monitoring of individual anxiety levels over time and developing effective interventions to reduce anxiety. Generalizability theory (G-theory) is a suitable method to distinguish between state and trait and to evaluate reliability of test scores and sources of meas...
Article
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Objectives The burgeoning field of individual level crime location choice research has required increasingly large datasets to model complex relationships between the attributes of potential crime locations and offenders’ choices. This study tests methods of sampling aiming to overcome computational challenges involved in the use of such large data...
Article
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Objectives Self-injurious behavior (SIB) refers to any repeated self-directed, non-suicidal, behavior that may cause or has the potential to cause physical harm to the person’s body. Behavioral interventions provide the standard evidence-based treatments for SIB by people with autism spectrum disorder (ASD) and intellectual disabilities (ID). Trans...
Article
Investigating how students approach learning is important for designing effective teaching programmes and to ensure better retention and application of information learned. The Revised Two-Factor Study Process Questionnaire (R-SPQ-2F) is a widely used instrument for assessing approaches to students’ learning, but its ability to distinguish between...
Article
Objectives: Pressures in daily life limit one's ability to be authentic and research shows that inauthenticity can be detrimental to mental health. Mindfulness is known to have a protective effect on mental health through an accepting and nonjudgmental stance. This study aimed to establish whether mindfulness buffers the relationship between inaut...
Article
Purpose The coronavirus disease 2019 (COVID-19) pandemic has forced organisations to change the way they work to maintain viability, even though change is not always successfully implemented. Multiple scholars have identified employees' readiness for change as an important factor of successful organisational change, but research focussed on psychol...
Article
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Objectives This study aimed to apply the generalizability theory (G-theory) to investigate dynamic and enduring patterns of subjective cognitive complaints (SCC), and reliability of two widely used SCC assessment tools. Design G-theory was applied to assessment scales using longitudinal measurement design with five assessments spanning 10 years of...
Article
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Objectives Mindfulness, positive affect, and compassion may protect against psychological distress but there is lack of understanding about the ways in which these factors are linked to mental health. Network analysis is a statistical method used to investigate complex associations among constructs in a single network and is particularly suitable f...
Article
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Objective: The 28-item Academic Motivation Scale (AMS) is a widely used measure of students’ motivation to learn but it has the common limitations of an ordinal scale such as low precision and unsuitability for parametric statistics. The current study aimed to evaluate the psychometric properties of the AMS using Rasch methodology and enhance the p...
Article
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The Positive and Negative Affect Schedule (PANAS; Watson, Clark, & Tellegan, Journal of Personality and Social Psychology, 54(6), 1063–1070, 1988) is a widely used affect measure but it has the limitations of an ordinal scale such as low precision and unsuitability for use with parametric statistics. Rasch analysis is an appropriate methodology use...
Article
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Objectives The Interpersonal Mindfulness Scale (IMS) is a recently developed measure to assess mindfulness in the context of interpersonal interactions. The IMS showed promising psychometric properties and is considered to be a trait measure, but its temporal reliability and ability to distinguish trait from state have not been rigorously examined...
Article
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Objectives Mindfulness has been shown to have beneficial effects with regard to improving well-being and lowering levels of distress. The Five Facet Mindfulness Questionnaire (FFMQ) has identified facets reflecting distinct mindfulness capacities, but it is not known yet to what extent they contribute individually to important outcomes such as well...
Article
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Objectives The 26-item Self-Compassion Scale (SCS) and its short 12-item version (SCS-SF) were reported to have acceptable psychometric properties, and both scales are widely used to assess self-compassion in individuals. However, recent investigations were inconsistent regarding factor structure of the SCS, and psychometric properties of the scale...
Article
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Objectives Mindfulness-Based Positive Behavior Support (MBPBS) has been shown to be effective in reducing stress and burnout in parents and professional caregivers of children and adolescents with intellectual and developmental disabilities (IDD) and autism spectrum disorder (ASD). The aim of this study was to assess the comparative effects of the...
Article
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The 18-item Transgression-Related Interpersonal Motivations Inventory (TRIM-18) is a three-dimensional measure of contextual forgiveness widely used in contexts of psychopathology. The present study aimed to examine the psychometric properties of the TRIM-18 in Italian adolescents. In study 1 and 2 we examined the internal validity of the scale usi...
Article
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It is well established that offenders' routine activity locations (nodes) shape their crime locations, but research examining the geography of offenders' routine activity spaces has to date largely been limited to a few core nodes such as homes and prior offense locations, and to small study areas. This paper explores the utility of police data to...
Article
Context: As psychosocial factors have been recognised as significant predictors of the recovery trajectory from chronic back pain, the 34-item Back Pain Attitudes Questionnaire (Back-PAQ) was developed based on themes obtained from patient interviews, but previous psychometric analyses with a general population sample revealed uncertainty around th...
Article
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This paper extends Crime Pattern Theory, proposing a theoretical framework which aims to explain how offenders' previous routine activity locations influence their future offence locations. The framework draws on studies of individual level crime location choice and location choice in non-criminal contexts, to identify attributes of prior activitie...
Article
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Abstract Objectives Mindfulness, positive self-related attitudes and secure attachment have been shown to protect against psychopathol- ogy during adolescence, but it is unknown how these factors are related to each other and which are most strongly linked to psychopathology symptoms. Methods A cross-sectional research design was used with a large...
Article
Objectives: Caring for individuals with intellectual disabilities (ID) or autism spectrum disorder (ASD) can be gratifying as well as stressful. Professional staff employed as caregivers often report compromised mental and physical wellbeing due to the stressful nature of working with clients who exhibit aggressive and destructive behaviors. Prolon...
Article
Objectives Self-compassion has become increasingly recognized for its benefits to human health and well-being, but continued work is required to achieve its accurate assessment in the context of research and psychological treatment. The Self-Compassion Scale (SCS) is widely referred to as a trait measure, although the scale’s ability to differentia...
Article
While the effectiveness of mindfulness-based interventions (MBIs) with respect to distress has been widely researched, unemployed individuals, who often suffer from high levels of distress, have largely been neglected in MBI research. The present study aimed to investigate the effects of a low-dose MBI on distress in a sample of young unemployed ad...
Article
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Persistent post-concussion syndrome (PCS) symptoms are known to last years after traumatic brain injury (TBI), and similar symptoms are increasingly being documented among those who have not experienced a TBI. There remains however, a dearth of empirical evidence on the structural composition of symptoms beyond the post-acute symptom phase after TB...
Article
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Background: A major problem in quantifying symptoms of schizophrenia is establishing a reliable distinction between enduring and dynamic aspects of psychopathology. This is critical for accurate diagnosis, monitoring and evaluating treatment effects in both clinical practice and trials. Materials and methods: We applied Generalisability Theory,...
Article
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Objectives While there have been studies exploring the relationships between parental representations of their child’s illness, parental emotional distress and coping, there is lack of research on parents of children with intellectual disability (ID). The present study explores relationships between parental illness representations of their child’s...
Article
Full-text available
Objectives The 27-item Interpersonal Mindfulness Scale (IMS) was recently developed to assess mindfulness as it occurs during interpersonal interactions but its psychometric properties have not been evaluated for compliance with fundamental principle measurement using Rasch analysis.MethodsA Partial Credit Rasch model was applied to investigate the...
Article
Full-text available
Objectives Accurate evaluation of mindfulness-based training requires understanding of the differences between state and trait changes, and the Generalizability Theory (G-Theory) is the most appropriate method to differentiate these aspects in a measure. The Five Facet Mindfulness Questionnaire (FFMQ) is widely used measure of dispositional mindful...
Article
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Caregivers of individuals with intellectual and developmental disabilities are often stressed due to the demands of the job, including the nature and severity of challenging behaviors of the clients, work conditions, degree of management support for the staff, and the demands of implementing some interventions under adverse conditions. Mindfulness-...
Article
Full-text available
Purpose The WHOQOL tools are widely used, multi-faceted, patient-rated, quality of life (QoL) measures, developed by the World Health Organization. The WHOQOL questionnaires are used to assess generic quality of life issues affected by all health problems. This study developed a module to use with the WHOQOL tools to improve their sensitivity to He...
Article
The Academic Motivation Scale (AMS) is a commonly used 28‐item measure of motivation orientation. However, the scale has not been examined using methods to distinguish between state and trait aspects of motivation. We applied Generalizability Theory to appraise the psychometric properties of the AMS and to differentiate items measuring state or tra...
Article
Full-text available
Objectives The present study investigated whether and how an 8-week mindfulness-based program for teachers influences teacher wellbeing and person-centered teaching practices that emphasize the quality of student-teacher relationships. Methods In the present mixed-methods design study, we analyzed three data sets from a larger study. Sixty teacher...
Article
Background Depression is a common problem in older adults. The 15-item Geriatric Depression Scale (GDS-15) is a widely used psychometric tool for measuring depression in the elderly, but its psychometric properties have not been yet rigorously investigated. The aim was to evaluate psychometric properties of the GDS-15 and improve precision of the...
Article
Full-text available
Objective: To determine whether the UK Functional Assessment Measure (UK FIM+FAM) fits the Rasch model in patients with complex disability following traumatic brain injury. Design: Psychometric evaluation including preliminary exploratory and confirmatory factor analyses followed by Rasch analysis. Participants: A multicentre UK national cohor...
Article
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Objectives Compromised educator well-being creates educational, social, and economic problems, which are not resolved by knowledge of risk factors alone. The present study explored the protective role of dispositional mindfulness and self-compassion within the context of educator stress. Methods A total of 231 educators from 21 Australian schools...
Article
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Alzheimer’s disease is a progressive neurodegenerative condition that affects cognition, mental and physical health, and functionality of older people. As the disease progresses from the mild to moderate stage, there is a concomitant increase in several behavioral variables, chiefly agitation, anger, and aggression. Currently, there are no evidence...
Article
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Objectives The present study investigates the effectiveness of an 8-week mindfulness-based intervention designed to improve educator wellbeing and implemented concurrently in multiple school sites. Methods Using a cluster (school) randomized controlled design, 185 educators working in 20 Australian schools were randomized to an intervention group...
Article
Objective: To use Rasch analysis to validate the WHOQoL-BREF and existing short versions in individuals with traumatic brain injury (TBI) and orthopaedic injuries, with comparisons to general population groups. Design: The Partial Credit Rasch model was applied to evaluate the WHOQoL-BREF as well as shortened versions using a cross-sectional study...
Presentation
Full-text available
To date, there is no reliable psychometric method to distinguish clearly between the important psychological measures of state and trait. Abstract: Generalisability Theory can be successfully applied to distinguish between state and trait components in a measure, and it is recommended as the most appropriate psychometric method to validate state an...
Presentation
Abstract: Ordinal and binary measures have limited precision, and using them with parametric statistical techniques violates the basic assumptions of these tests. Rasch analysis employs a probabilistic logistic model and is particularly suited for enhancing precision of ordinal and binary scales. Rasch analysis has shown numerous advantages over ot...