OBJECTIVE To report the initial evaluation of the linguistic and psychometric validation of the Nepean Dyspepsia Index (NDI), as part of the ongoing research of quality of life among dyspeptic patients. METHODS The Arabic version of the NDI was administered to 158 subjects (54 with non-ulcer dyspeptic [NUD]), 50 with gastro-esophageal reflux disease (GERD) and 54 with no history of gastroente...

Objectives To (1) give an overview of commonly used game-specific skills tests in rugby and (2) evaluate available psychometric information of these tests. Methods The databases PubMed, MEDLINE CINAHL and Africa Wide information were systematically searched for articles published between January 1995 and March 2017. First, commonly used game-specific skills tests were identified. Second, the ...

BACKGROUND Comprehensive and psychometrically tested measures of availability and accessibility of food are needed in order to explore availability and accessibility as determinants and predictors of dietary behaviors. The main aim of this systematic review was to update the evidence regarding the psychometric properties of measures of food availability and accessibility among youth. A secondar...

When objects are viewed in different illuminants, their color does not change or changes little in spite of significant changes in the wavelength composition of the light reflected from them. In previous studies, we have addressed the physiology underlying this color constancy by recording from cells in areas V1, V2, and V4 of the anesthetized monkey. Truly color-coded cells, ones that respond ...

The psychometric function describes how an experimental variable, such as stimulus strength, influences the behaviour of an observer. Estimation of psychometric functions from experimental data plays a central role in fields such as psychophysics, experimental psychology and in the behavioural neurosciences. Experimental data may exhibit substantial overdispersion, which may result from non-sta...

OBJECTIVE The Fagerström Test for Nicotine Dependence (FTND) is a screening instrument for physical nicotine dependence and is extensively used in various countries. The objective of the present report was to review articles related to the psychometric properties of the FTND. METHODS A systematic search for articles published up through December of 2007 was carried out in various electronic d...

Internet Gaming Disorder [IGD] has recently received nomenclatural recognition from official medical bodies as a potential mental health disorder, despite evident variability and inconsistencies in its core conceptualization and psychometric assessment. In the present review, the authors argue how the adoption of inconsistent criteria and psychometric tools to assess IGD negatively influenced t...

A review is provided for the creation of the Psychometric Society in 1935, and the establishment of its journal, Psychometrika, in 1936. This document is part of the 80th anniversary celebration for Psychometrika's founding, held during the annual meeting of the Psychometric Society in July of 2016 in Asheville, NC.

Background and aim—An oral glutamine load in cirrhotic patients awaiting liver transplantation was shown to cause a rise in blood ammonia and psychometric abnormalities which were reversed by hepatic transplantation. L-Ornithine-Laspartate (LOLA) has been shown to reduce ammonia and improve psychometric function in patients with hepatic encephalopathy. The aim of the present study was to assess...

BACKGROUND Informal carers face many challenges in caring for patients with palliative care needs. Selecting suitable valid and reliable outcome measures to determine the impact of caring and carers' outcomes is a common problem. AIM To identify outcome measures used for informal carers looking after patients with palliative care needs, and to evaluate the measures' psychometric properties. ...