In this study, daily step counts were recorded for 4 consecutive days in 129 four- and five-year-old children. To compare daily Yamax Digiwalker step counts with minutes of engagement in moderate to vigorous physical activity (MVPA), concurrent accelerometer data were collected in a random subsample (n = 76). The average daily step count was 9,980 (+/- 2,605). Step counts and MVPA minutes were ...

The present study aims to compare the Kernel equating and local methods in observed score equating. Functions error estimates regarding difference between raw equated scores by Stocking-Lord Haebara true-score were examined Item Response Theory Observed Score Equating. Therefore, 5, 10, 15 external anchor items used, obtained from two forms based on 2PL model. R (version 3.5.3.) programming sof...

The purpose of this dissertation was to investigate how different Item Response Theory (IRT)-based calibration methods affect student achievement growth pattern recovery. Ninety-six vertical scales (4 × 2 × 2 × 2 ×3) were constructed using different combinations of IRT calibration methods (separate, pair-wise concurrent, semiconcurrent, and concurrent), lengths of common-item set (10 vs. 20 com...

As part of its nonprofit mission, ETS conducts and disseminates the results of research to advance quality and equity in education and assessment for the benefit of ETS's constituents and the field. To obtain a PDF or a print copy of a report, please visit: Abstract The nonequivalent groups with anchor test (NEAT) design involves missing data that are missing by design. Three popular equating m...

The purpose of this study was to evaluate the effectiveness of the hybrid Levine equipercentile (Hybrid LE) and modified frequency estimation (MFE) equating methods in improving accuracy of equating as compared to the percentile rank frequency estimation (FE), kernel frequency estimation (Kernel FE) and percentile rank chained equipercentile (CE) equating methods under the common-item nonequiva...

The performance of dichotomous and polytomous IRT models in equating testletbased tests was compared in this study. To clarify the conditions under which dichotomous and polytomous item response models produce differing results, the DIMTEST program was used for testing essential unidimensionality, and a bias-corrected index (Final Condcorr) was adapted in this study for measuring local item dep...

Andersson, B. 2014. Contributions to Kernel Equating. Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Social Sciences 106. 24 pp. Uppsala: Acta Universitatis Upsaliensis. ISBN 978-91-554-9089-8. The statistical practice of equating is needed when scores on different versions of the same standardized test are to be compared. This thesis constitutes four contributions...

This paper investigated the structural robustness of Life Satisfaction Scale (LSS) among Nigerian Pre-service Teachers. The study anchors on scale development research type non-experimental design. Participants were selected randomly, totaling 509. adopted instrument titled satisfaction with life content validity index 0.84 and ordinal alpha reliability (α=0.75) aided in gathering data for stud...

The R package equate (Albano, 2010) contains functions for non-IRT equating under random groups and nonequivalent groups designs. This package vignette introduces these designs and provides an overview of statistical equating with details about each of the supported equating methods. Examples demonstrate the basic functionality of the package.