Results 11 to 20 of about 446,030 (245)

Factors related to retention in a longitudinal study of infants at familial risk for autism

JCPP Advances, 2023
Background Reporting retention data is critical to determining the soundness of a study's conclusions (internal validity) and broader generalizability (external validity).
Sally Ozonoff, Monique M. Hill, Alesha Hill, Kevin Ashley, Gregory S. Young   +4 more
doaj   +1 more source

On the Feasibility of Extending Social Experiments to Wider Applications

Journal of MultiDisciplinary Evaluation, 2016
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
doaj   +1 more source

Why a Trade-Off? The Relationship between the External and Internal Validity of Experiments

Theoria, 2010
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
doaj   +1 more source

University Students’ Hangover May Affect Cognitive Research

Frontiers in Psychology, 2020
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, Serena Mingolo, Valter Prpic, Fabrizio Sors, Ilaria Santoro, Eleonora Bilotta, Tiziano Agostini   +6 more
doaj   +1 more source

Not all Perfectionists Are as They Are Assessed: An Investigation of the Psychometric Properties of the Perfectionism Inventory in the Teaching Profession

Frontiers in Psychology, 2021
Perfectionism has been studied for almost 30 years. In the present study, we investigated the internal validity of The Perfectionism Inventory (PI—Hill et al., 2004) in an occupation that encourages perfectionistic tendencies in own behavior or in ...
Elena Mirela Samfira, Laurenţiu P. Maricuţoiu, Laurenţiu P. Maricuţoiu   +2 more
doaj   +1 more source

Validity of a self-administered food frequency questionnaire (FFQ) and its generalizability to the estimation of dietary folate intake in Japan

Nutrition Journal, 2005
Background In an epidemiological study, it is essential to test the validity of the food frequency questionnaire (FFQ) for its ability to estimate dietary intake.
Iso Hiroyasu, Yamamoto Seiichiro, Ishihara Junko, Inoue Manami, Tsugane Shoichiro   +4 more
doaj   +1 more source

Internal, external, and ecological validity in research design, conduct, and evaluation

Indian Journal of Psychological Medicine, 2018
Reliability and validity describe desirable psychometric characteristics of research instruments. The concept of validity is also applied to research studies and their findings.
Chittaranjan Andrade
doaj   +1 more source

Say where you sample: Increasing site selection transparency in urban ecology

Ecosphere, 2023
Urban ecological studies have the potential to expand our understanding of socioecological systems beyond that of an individual city or region. Cross‐comparative empirical work and synthesis are imperative to develop a general urban ecological theory ...
Karen Dyson, Emad Dawwas, Renata Poulton Kamakura, Marina Alberti, Tracy L. Fuentes   +4 more
doaj   +1 more source

To Mix or Not To Mix? A Meta-Method Approach to Rethinking Evaluation Practices for Improved Effectiveness and Efficiency of Psychological Therapies Illustrated With the Application of Perceptual Control Theory

Frontiers in Psychology, 2019
Progress in the development of more effective and efficient psychological therapies could be accelerated with innovative and nuanced approaches to research methodology. Therapy development has been dominated by a mono-methodology attitude with randomized
Timothy A. Carey, Vyv Huddy, Robert Griffiths, Robert Griffiths   +3 more
doaj   +1 more source

Reply to: “Research on agroforestry systems and biodiversity conservation: what can we conclude so far and what should we improve?” by Boinot et al. 2022

BMC Ecology and Evolution, 2022
In our article ‘European agroforestry has no unequivocal effect on biodiversity: a time-cumulative meta-analysis’ (BMC Ecology and Evolution, 2021) we synthesize the effect of agroforestry on biodiversity. Boinot et al.
Anne-Christine Mupepele, Carsten F. Dormann   +1 more
doaj   +1 more source