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Evaluating Test-Retest Reliability and Measurement Error of the Lumbar Flexion Relaxation Ratio within and between Days
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Samuel J. Howarth; Erinn McCreath Frangakis; Steven Hirsch; Diana De Carvalho – Measurement in Physical Education and Exercise Science, 2024
The flexion relaxation ratio (FRR) of the lumbar extensor muscles is often assessed in experimental and clinical studies. This study evaluated within- and between-session test--retest reliability and measurement error for different FRR formulations. Participants completed two identical data collection sessions 1-week apart. Spine flexion and…
Descriptors: Exercise Physiology, Human Body, Pretests Posttests, Error of Measurement
Confirming Increased Statistical Errors in Testing Correlations from Small Sample Sizes
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Duane Knudson – Measurement in Physical Education and Exercise Science, 2025
Small sample sizes contribute to several problems in research and knowledge advancement. This conceptual replication study confirmed and extended the inflation of type II errors and confidence intervals in correlation analyses of small sample sizes common in kinesiology/exercise science. Current population data (N = 18, 230, & 464) on four…
Descriptors: Kinesiology, Exercise, Biomechanics, Movement Education
Critical Review of the Literature and Current Tendencies of the Common Method Variance in Sport Management Research
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Kaltsonoudi, Kalliope; Tsigilis, Nikolaos; Karteroliotis, Konstantinos – Measurement in Physical Education and Exercise Science, 2022
Common method variance refers to the amount of uncontrolled systematic error leading to biased estimates of scale reliability and validity and to spurious covariance shared among variables due to common method and/or common source employed in survey-based researches. As the extended use of self-report questionnaires is inevitable, numerous studies…
Descriptors: Athletics, Research, Research Methodology, Error of Measurement
Evaluation of Body Fat Prediction Equations from a Portable A-Mode Ultrasound Compared to Air Displacement Plethysmography
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Lowry, R. Stephan; Wagner, Dale R.; Bigler, Megan – Measurement in Physical Education and Exercise Science, 2021
BodyMetrix BX2000 A-mode ultrasound software offers nine options for estimating body fat percentage (%BF) from fat thickness measurements. These formulas were evaluated against %BF estimated from air displacement plethysmography in a sample of 42 men. Compared to the Bod Pod, three of the nine equations -- Jackson and Pollock 3 site (JP3), Jackson…
Descriptors: Body Composition, Measurement Equipment, Measurement Techniques, Error of Measurement
Psychometric Properties of the French and German Versions of the Physical Self-Concept Questionnaire for Elementary School Children-Revised (PSCQ-C-R)
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Maïano, Christophe; Thibault, Isabelle; Dreiskämper, Dennis; Henning, Lena; Tietjens, Maike; Aimé, Annie – Measurement in Physical Education and Exercise Science, 2023
The present study sought to examine the psychometric properties of the French and German versions of the Physical Self-Concept Questionnaire for Elementary School Children-Revised (PSCQ-C-R). A sample of 519 children participated in this study. Of those, 197 were French-Canadian and 322 were German. Results support the factor validity and…
Descriptors: Elementary School Students, Self Concept, Human Body, Questionnaires