A comprehensive item bank of internal validity issues of relevance to in vitro toxicology studies [PDF]
Context In vitro toxicology studies are increasingly being included as evidence in systematic reviews and chemical risk assessments. INVITES-IN, a tool for assessing the internal validity of in vitro studies, is currently under development.
Gunn E. Vist +22 more
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Current Status of Animal-Assisted Interventions in Scientific Literature: A Critical Comment on Their Internal Validity [PDF]
Many meta-analyses and systematic reviews have tried to assess the efficacy of animal-assisted interventions (AAIs), reaching inconsistent conclusions.
Javier López-Cepero
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An Internal Validity Index Based on Density-Involved Distance
It is crucial to evaluate the quality of clustering results in cluster analysis. Although many cluster validity indices (CVIs) have been proposed in the literature, they have some limitations when dealing with non-spherical datasets.
Lianyu Hu, Caiming Zhong
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Psychometric properties of an instrument 2: structural validity, internal consistency, and cross-cultural validity/measurement invariance [PDF]
Structural validity, internal consistency, and cross-cultural validity/measurement invariance are psychometric properties of the internal structure of an instrument.
Eun-Hyun Lee
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Factors related to retention in a longitudinal study of infants at familial risk for autism
Background Reporting retention data is critical to determining the soundness of a study's conclusions (internal validity) and broader generalizability (external validity).
Sally Ozonoff +4 more
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Sedentary behavior, particularly sitting, is ubiquitous in many contemporary societies. This is a major societal concern considering the evidence for a strong association between sitting behavior and cardiovascular disease morbidity and mortality ...
Lee Stoner +11 more
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Investigating the Factor Structure of iSkills™
This paper investigates the issue of internal validity in the context of complex assessments and constructs, focusing on Information and Communication Technology (ICT) literacy as measured by the iSkills assessment. Utilizing exploratory and confirmatory
Irvin R. Katz +2 more
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University Students’ Hangover May Affect Cognitive Research
University students are the most employed category of participants in cognitive research. However, researchers cannot fully control what their participants do the night before the experiments (e.g., consumption of alcohol) and, unless the experiment ...
Mauro Murgia +6 more
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On the Feasibility of Extending Social Experiments to Wider Applications
Background: When deciding how to allocate limited funds for social programs, policymakers and program managers increasingly ask for evidence of effectiveness based on studies that rely on solid methodology, providing credible scientific evidence.
Stephen H. Bell, Laura R. Peck
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Why a Trade-Off? The Relationship between the External and Internal Validity of Experiments
Much of the methodological discussion around experiments in economics and other social sciences is framed in terms of the notions of internal and external validity. The standard view is that internal validity and external validity stand in a relationship
Maria Jimenez-Buedo, Luis Miguel Miller
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