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DIF signalling and cell fate [PDF]
Seminars in Cell and Developmental Biology, 1999 The DIFs are a family of secreted chlorinated molecules that control cell fate during development of Dictyostelium cells in culture and probably during normal development too. They induce stalk cell differentiation and suppress spore cell formation. The biosynthetic and inactivation pathways of DIF-1 (the major bioactivity) have been worked out.
Robert R Kay, Christopher Thompson
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The Effect of Propensity Scores on DIF Analysis: Inference on the Potential Cause of DIF
International Journal of Testing, 2014Differential item functioning (DIF) analysis is important in terms of test fairness. While DIF analyses have mainly been conducted with manifest grouping variables, such as gender or race/ethnicity, it has been recently claimed that not only the grouping variables but also contextual variables pertaining to examinees should be considered in DIF ...
HyeSun Lee, Kurt F. Geisinger
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A Multidimensionality-Based DIF Analysis Paradigm [PDF]
Applied Psychological Measurement, 1996 A multidimensionality-based differential item functioning (DIF) analysis paradigm is presented that unifies the substantive and statistical DIF analysis approaches by linking both to a theoretically sound and mathematically rigorous multidimensional ...
William Stout
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Broadband development and firm creation: Dif-in-dif estimates for Germany
AHFE International, 2022Although some of the outcomes of the digital transformation are reflected in the scientific literature, the connection between high-speed internet transmission rates and firm entries is still poorly studied. While some positive impact of basic broadband availability in Germany was found in our previous studies, in this paper we decided to examine the ...
Kirill Sarachuk, Magdalena Missler
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Not all DIF is shaped similarly
Psychometrika, 2021In response to the target article by Teresi et al. (2021), we explain why the article is useful and we also present a different approach. An alternative category of differential item functioning (DIF) is presented with a corresponding way of modeling DIF, based on random person and random item effects and explanatory covariates.
De Boeck, Paul, Cho, Sun-Joo
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Proceedings RIDE '96. Sixth International Workshop on Research Issues in Data Engineering, 2002
Most computerized data is not under the purview of traditional database management systems, but, rather, it is stored in files. Data Interchange Formats (DIFs) are the basis of an important class of such files, containing massive volumes of data, and serving a large user community.
Paul Benninghoff, David Maier 0001
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Most computerized data is not under the purview of traditional database management systems, but, rather, it is stored in files. Data Interchange Formats (DIFs) are the basis of an important class of such files, containing massive volumes of data, and serving a large user community.
Paul Benninghoff, David Maier 0001
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An Examination of Item Context Effects, DIF, and Gender DIF
Applied Measurement in Education, 2001This investigation examined whether the patterns of gender differential item functioning (DIF) present in parcels of items are influenced by changes in item position. Items were studied collectively to detect differential bundle functioning (DBF) on 2 forms of a test of mathematics for college freshmen. To investigate order effects, 2 forms of the test
Katherine E. Ryan, Shuwan Chiu
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Applied Psychological Measurement, 2010
Practitioners are increasingly becoming interested in Differential Item Functioning (DIF) forimproving the validity of test and scale interpretations. Among the statistical procedures availableto assess DIF in dichotomous and polytomous items, the Mantel-Haenszel chi-square (1959) andother standardization proceduresmay beparticularly attractive to ...
Andrés González +4 more
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Practitioners are increasingly becoming interested in Differential Item Functioning (DIF) forimproving the validity of test and scale interpretations. Among the statistical procedures availableto assess DIF in dichotomous and polytomous items, the Mantel-Haenszel chi-square (1959) andother standardization proceduresmay beparticularly attractive to ...
Andrés González +4 more
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DIF Algorithms for DCT and DST
ICASSP '85. IEEE International Conference on Acoustics, Speech, and Signal Processing, 2005Decimation-In-Frequency (DIF) algorithms for a family of discrete cosine and sine transforms (DCT) and (DST) are systematically developed, based on a radix-2 factorization of the transformation matrices. The results indicate these to be viable alternatives to existing algorithms for the calculation of these discrete transforms.
Patrick C. Yip, Kamisetty Ramamohan Rao
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The DIF-Free-Then-DIF Strategy for the Assessment of Differential Item Functioning
Educational and Psychological Measurement, 2012The DIF-free-then-DIF (DFTD) strategy consists of two steps: (a) select a set of items that are the most likely to be DIF-free and (b) assess the other items for DIF (differential item functioning) using the designated items as anchors. The rank-based method together with the computer software IRTLRDIF can select a set of DIF-free polytomous items very
Wen-Chung Wang +2 more
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