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Revue Scientifique Et Technique... Jun 2021Reproducibility is the ability of an assay to provide consistent results (when testing the same samples) in different laboratories. The validation of a new diagnostic...
Reproducibility is the ability of an assay to provide consistent results (when testing the same samples) in different laboratories. The validation of a new diagnostic assay should include specific assessment of assay reproducibility to determine the degree to which results are unaffected by minor changes in experimental conditions. Ideally, assessment of reproducibility involves the testing of identical samples in multiple laboratories by multiple analysts using the same method, reagents and controls, albeit with different equipment. Such an assessment will provide estimates of the precision and accuracy of an assay across laboratories. In reality, although the reproducibility of an assay is often assessed by multiple laboratories testing identical samples, the reagents, controls and testing platforms used, while similar, are usually not the same. Thus, reproducibility testing permits the assessment of variability resulting from different testing platforms, reagent supplies and operators. The determination of minor versus major variations in test conditions that may be anticipated in multi-laboratory use is part of the assessment at this stage of validation. Once validated, there are ongoing monitoring requirements to assess the performance characteristics and ensure they are consistently maintained. The use of quality assurance programmes is required, as this offers continued monitoring of assay performance by measuring the precision and accuracy of results for well-characterised samples and controls. Tests recommended by the World Organisation for Animal Health as fit for purpose are widely used internationally and need to have satisfactory reproducibility.
Topics: Animals; Laboratories; Reproducibility of Results
PubMed: 34140735
DOI: 10.20506/rst.40.1.3213 -
Frontiers in Psychology 2020Focusing on lucid dreaming, this paper examined relationships between dissociated experiences related to rapid eye movement (REM) sleep (lucid dreaming, nightmares, and...
Focusing on lucid dreaming, this paper examined relationships between dissociated experiences related to rapid eye movement (REM) sleep (lucid dreaming, nightmares, and sleep paralysis), reality testing, and paranormal experiences/beliefs. The study comprised a UK-based online sample of 455 respondents (110 males, 345 females, = 34.46 years, = 15.70), who had all previously experienced lucid dreaming. Respondents completed established self-report measures assessing control within lucid dreaming, experience and frequency of nightmares, incidence of sleep paralysis, proneness to reality testing deficits (Inventory of Personality Organization subscale, IPO-RT), subjective experience of receptive psi and life after death (paranormal experience), and paranormal belief. Analysis comprised tests of correlational and predictive relationships between sleep-related outcomes, IPO-RT scores, and paranormal measures. Significant positive correlations between sleep and paranormal measures were weak. Paranormal measures related differentially to sleep indices. Paranormal experience correlated with lucid dreaming, nightmares, and sleep paralysis, whereas paranormal belief related only to nightmares and sleep paralysis. IPO-RT correlated positively with all paranormal and sleep-related measures. Within the IPO-RT, the Auditory and Visual Hallucinations sub-factor demonstrated the strongest positive associations with sleep measures. Structural equation modeling indicated that Auditory and Visual Hallucinations significantly positively predicted dissociated experiences related to REM sleep, while paranormal experience did not. However, paranormal experience was a significant predictor when analysis controlled for Auditory and Visual Hallucinations. The moderate positive association between these variables explained this effect. Findings indicated that self-generated, productive cognitive-processes (as encompassed by Auditory and Visual Hallucinations) played a significant role in conscious control and awareness of lucid dreaming, and related dissociative sleep states (sleep paralysis and nightmares).
PubMed: 32256437
DOI: 10.3389/fpsyg.2020.00471 -
Acta Neurochirurgica May 2021Surgical treatment of tumors, epileptic foci or of vascular origin, requires a detailed individual pre-surgical workup and intra-operative surveillance of brain... (Review)
Review
Surgical treatment of tumors, epileptic foci or of vascular origin, requires a detailed individual pre-surgical workup and intra-operative surveillance of brain functions to minimize the risk of post-surgical neurological deficits and decline of quality of life. Most attention is attributed to language, motor functions, and perception. However, higher cognitive functions such as social cognition, personality, and the sense of self may be affected by brain surgery. To date, the precise localization and the network patterns of brain regions involved in such functions are not yet fully understood, making the assessment of risks of related post-surgical deficits difficult. It is in the interest of neurosurgeons to understand with which neural systems related to selfhood and personality they are interfering during surgery. Recent neuroscience research using virtual reality and clinical observations suggest that the insular cortex, medial prefrontal cortex, and temporo-parietal junction are important components of a neural system dedicated to self-consciousness based on multisensory bodily processing, including exteroceptive and interoceptive cues (bodily self-consciousness (BSC)). Here, we argue that combined extra- and intra-operative approaches using targeted cognitive testing, functional imaging and EEG, virtual reality, combined with multisensory stimulations, may contribute to the assessment of the BSC and related cognitive aspects. Although the usefulness of particular biomarkers, such as cardiac and respiratory signals linked to virtual reality, and of heartbeat evoked potentials as a surrogate marker for intactness of multisensory integration for intra-operative monitoring has to be proved, systemic and automatized testing of BSC in neurosurgical patients will improve future surgical outcome.
Topics: Body Image; Brain Mapping; Cognition; Evoked Potentials; Heart Rate; Humans; Neurosurgical Procedures; Self Concept
PubMed: 33686522
DOI: 10.1007/s00701-021-04778-3 -
Cancer Cytopathology Mar 2018
Topics: High-Throughput Nucleotide Sequencing; Humans; Lung Neoplasms; Nucleotides; RNA; Thyroid Neoplasms
PubMed: 29364571
DOI: 10.1002/cncy.21962 -
Focus (American Psychiatric Publishing) Jul 2018Virtual reality (VR) technology offers new opportunities for the development of innovative clinical research, assessment, and intervention tools. VR-based testing,... (Review)
Review
Virtual reality (VR) technology offers new opportunities for the development of innovative clinical research, assessment, and intervention tools. VR-based testing, training, teaching, and treatment approaches that would be difficult, if not impossible, to deliver with traditional methods are now being developed that take advantage of the assets that are available with VR technology. As research evidence continues to indicate clinical efficacy, VR applications are being increasingly regarded as providing innovative options for targeting the cognitive, psychological, motor, and functional impairments that result from various clinical health conditions. VR allows for the precise presentation and control of stimuli in dynamic, multisensory, 3D computer-generated simulations as well as providing advanced methods for capturing and quantifying behavioral responses. These characteristics support the rationale for the use of VR applications in clinical assessment, intervention, and training. This article begins with a brief review of the history of and rationale for the use of VR with clinical populations. It then details one use case for the clinical application of VR-the exposure-therapy treatment of anxiety disorders and posttraumatic stress disorder. Although significant work is cited in other areas of clinical VR (e.g., pain management, cognitive and physical assessment and rehabilitation, eating disorders, social skills, and clinical training), a full overview of such a broad literature is beyond the scope of this article. Thus, the authors have opted to provide more in-depth analysis of one specific clinical area that clearly illustrates how VR has been successfully applied and is supported by an encouraging and evolving scientific literature.
PubMed: 31975921
DOI: 10.1176/appi.focus.20180011 -
Journal of Vision Jan 2023Extended reality (XR) devices, including virtual reality (VR), augmented reality (AR), and mixed reality (MR) devices, are immersive technologies that can swap or merge...
Extended reality (XR) devices, including virtual reality (VR), augmented reality (AR), and mixed reality (MR) devices, are immersive technologies that can swap or merge the natural environment with virtual content (e.g., videogames, movies, or other content). Although these devices are widely used for playing videogames and other applications, they have one distinct feature that makes them potentially very useful for the measurement and treatment of binocular vision anomalies-they can deliver different content to the two eyes simultaneously. Indeed, horizontally shifting the images in the two eyes (thereby creating binocular disparity) can provide the user with a compelling percept of depth through stereopsis. Because these devices are stereoscopic, they can also be used as high-tech synoptophores, in which the images to the two eyes differ in contrast, luminance, size, position, and content for measuring and treating binocular anomalies. The inclusion of eye tracking in VR adds an additional dimension to its utility in measuring and treating binocular vision anomalies, as well as other conditions. This paper describes the essential requirements for testing and treating binocular anomalies and reviews current studies in which XR devices have been used to measure and treat binocular vision anomalies.
Topics: Humans; Vision, Binocular; Depth Perception; Vision, Ocular; Vision Disparity; Virtual Reality
PubMed: 36662501
DOI: 10.1167/jov.23.1.14 -
Dementia and Geriatric Cognitive... 2018Cognitive therapy is a well-established intervention for treating elderly suffering from dementia. In particular, reality orientation and skills training seem to be... (Comparative Study)
Comparative Study Review
BACKGROUND
Cognitive therapy is a well-established intervention for treating elderly suffering from dementia. In particular, reality orientation and skills training seem to be effective interventions for reversing cognitive impairment among elderly, although findings are inconclusive. Therefore, a systematic update of the existing evidence of cognitive therapy for people suffering from dementia is needed.
AIM
To review existing scientific evidence regarding the efficacy of cognitive therapies for elderly suffering from dementia.
METHODS
Studies were retrieved from several bibliographic databases (January 2009 to December 2017) with prespecified selection criteria, data extraction, and methodological quality assessment.
RESULTS
In total, 10 reality orientation, 25 skills training, and 12 mixed trials were identified as meeting the inclusion criteria and were systematically reviewed. Results from reality orientation trials showed minor effects for cognitive assessments, while skills training trials and mixed trials showed contradicting effects on cognition. Effects on other outcomes (e.g., daily functioning, depression, language) were limited or not found.
CONCLUSIONS
Skills training trials and mixed trials seem to affect cognitive impairment in a positive way, although the results are inconclusive. Comparison between studies was difficult due to differences in form of intervention. Because findings are inconclusive, more structuralized and comparable randomized controlled trials are needed.
Topics: Adaptation, Psychological; Aged; Alzheimer Disease; Cognition; Cognition Disorders; Cognitive Behavioral Therapy; Depressive Disorder; Female; Humans; Language; Male; Randomized Controlled Trials as Topic; Reality Testing; Treatment Outcome
PubMed: 30092585
DOI: 10.1159/000490851 -
Archives of Medical Science : AMS Apr 2018Neurosurgery is a medical specialty that relies heavily on imaging. The use of computed tomography and magnetic resonance images during preoperative planning and...
Neurosurgery is a medical specialty that relies heavily on imaging. The use of computed tomography and magnetic resonance images during preoperative planning and intraoperative surgical navigation is vital to the success of the surgery and positive patient outcome. Augmented reality application in neurosurgery has the potential to revolutionize and change the way neurosurgeons plan and perform surgical procedures in the future. Augmented reality technology is currently commercially available for neurosurgery for simulation and training. However, the use of augmented reality in the clinical setting is still in its infancy. Researchers are now testing augmented reality system prototypes to determine and address the barriers and limitations of the technology before it can be widely accepted and used in the clinical setting.
PubMed: 29765445
DOI: 10.5114/aoms.2016.58690 -
Ugeskrift For Laeger Feb 2022Digital health technology is promising for improving mental healthcare by enabling continuous monitoring of behaviour by smartphones and wearables, new paradigms for... (Review)
Review
Digital health technology is promising for improving mental healthcare by enabling continuous monitoring of behaviour by smartphones and wearables, new paradigms for testing in virtual reality, and analysis of big data through machine learning for prediction models. This might advance prevention efforts, and contribute to diagnostics and treatment; however, high quality studies of clinical effects and applicability are needed before implementation. In this review, we summarize the current status of the field relevant for a Danish mental healthcare setting, and comment on challenges.
Topics: Humans; Machine Learning; Psychiatry; Smartphone; Virtual Reality
PubMed: 35244022
DOI: No ID Found -
Nutrients Sep 2020The use of Extended Reality (XR) (i.e. Virtual and Augmented Reality) for nutrition education and behavior change has not been comprehensively reviewed. This paper... (Review)
Review
The use of Extended Reality (XR) (i.e. Virtual and Augmented Reality) for nutrition education and behavior change has not been comprehensively reviewed. This paper presents findings from a scoping review of current published research. Articles ( = 92) were extracted from PubMed and Scopus using a structured search strategy and selection approach. Pertinent study information was extracted using a standardized data collection form. Each article was independently reviewed and coded by two members of the research team, who then met to resolve any coding discrepancies. There is an increasing trend in publication in this area, mostly regarding Virtual Reality. Most studies used developmental testing in a lab setting, employed descriptive or observational methods, and focused on momentary behavior change like food selection rather than education. The growth and diversity of XR studies suggest the potential of this approach. There is a need and opportunity for more XR technology focused on children and other foundational theoretical determinants of behavior change to be addressed within nutrition education. Our findings suggest that XR technology is a burgeoning approach in the field of nutrition, but important gaps remain, including inadequate methodological rigor, community application, and assessment of the impact on dietary behaviors.
Topics: Behavior Therapy; Diet; Food Preferences; Health Behavior; Health Education; Humans; Nutritional Sciences; Virtual Reality
PubMed: 32971972
DOI: 10.3390/nu12092899