We evaluated the reproducibility and validity of an FFQ used in a Chinese community-based nutrition and health survey. A total of ninety-nine males and 104 females aged 31-80 years completed four three consecutive 24-h dietary recalls (24-HDR, served as a reference method, one three consecutive 24-HDR for each season) and two FFQ (FFQ1 and FFQ2) over a 1-year interval. The reproducibility of th...

Objective: the RE-AIM framework has been widely used to evaluate internal and external validity of interventions aimed to promote physical activity, helping to provide comprehensive evaluation of the reach, efficacy, adoption, implementation and maintenance of research and programming. Despite this progress, the RE-AIM framework has not been used widely in Latin America. The purpose of this man...

OBJECTIVE The aim of this study was to examine the concurrent validity of a newly developed computerized memory diagnostic system (MDS) with the Korean version of the Consortium to Establish a Registry for Alzheimer's Disease Assessment Packet (CERAD-K). METHODS Subtests of the MDS and CERAD-K, including the auditory-verbal, visuo-spatial, and working memory tests, were administered to 43 adu...

BACKGROUND Two of the current methodological barriers to implementation science efforts are the lack of agreement regarding constructs hypothesized to affect implementation success and identifiable measures of these constructs. In order to address these gaps, the main goals of this paper were to identify a multi-level framework that captures the predominant factors that impact implementation ou...

BACKGROUND This study investigated the impact of addressing item writing flaws, testing at low cognitive level and non-functioning distractors (< 5 % selection frequency) in multiple-choice assessment in preclinical medical education. METHOD Multiple-choice questions with too high or too low difficulty (difficulty index < 0.4 or > 0.8) and insufficient discriminatory ability (point-biserial c...

The purposes of the study were to define the construct of novelty in the context of tourism, to conceptualize its role in the destination choice process, and to develop an instrument to measure novelty. The novelty construct was comprised of four interrelated but distinctive dimensions: thrill, change from routine, boredom alleviation, and surprise. A 21 item instrument was developed to measure...

With the recent boom in impact evaluations around the world, policymakers in many sectors now have at their disposal an overwhelming amount of evidence about “what works” or at least what worked in a particular context. Yet as impact evaluations have multiplied, it has become apparent that “the same” policy can have very different effects in different populations (Vivalt 2016). Similarly, polic...

BACKGROUND Commercially available activity monitors, such as the Fitbit, may encourage physical activity. However, the accuracy of the Fitbit in older adults remains unknown. This study aimed to determine (1) the criterion validity of Fitbit step counts compared to visual count and ActiGraph accelerometer step counts and (2) the accuracy of ActiGraph step counts compared to visual count in comm...

To date, fMRI research has been concerned primarily with evincing generic principles of brain function through averaging data from multiple subjects. Given rapid developments in both hardware and analysis tools, the field is now poised to study fMRI-derived measures in individual subjects, and to relate these to psychological traits or genetic variations. We discuss issues of validity, reliabil...