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Psych, Volume 2, Issue 3 (September 2020) – 3 articles

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Open AccessArticle
Robust Haebara Linking for Many Groups: Performance in the Case of Uniform DIF
Psych 2020, 2(3), 155-173; https://doi.org/10.3390/psych2030014 - 28 Jul 2020
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Abstract
The comparison of group means in item response models constitutes an important issue in empirical research. The present article discusses a slight extension of the robust Haebara linking approach of He and Cui [Appl. Psychol. Meas., 44, 296–310, 2020] by [...] Read more.
The comparison of group means in item response models constitutes an important issue in empirical research. The present article discusses a slight extension of the robust Haebara linking approach of He and Cui [Appl. Psychol. Meas., 44, 296–310, 2020] by proposing a flexible class of robust Haebara linking functions for comparisons of many groups. These robust linking functions are robust against violations of invariance. In this article, we investigate the performance of robust Haebara linking in the presence of uniform DIF effects. In an analytical derivation, it is shown that the robust Haebara linking approach provides unbiased estimates of group means in the limiting case p=0. In a simulation study, it is demonstrated that the proposed variant of the Haebara linking approach outperforms existing implementations of Haebara linking to some extent. In an empirical application using PISA data, it is illustrated that country means can be sensitive to the choice of linking functions. Full article
(This article belongs to the Section Psychometrics and Educational Measurement)
Open AccessEditorial
Psych: An International, Open Access, Peer Reviewed Journal on Fields Ranging from Experimental Psychology to Clinical Psychiatry
Psych 2020, 2(3), 153-154; https://doi.org/10.3390/psych2030013 - 03 Jul 2020
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Abstract
It is with great honour and pleasure that I introduce, on behalf of the four Section Editors-in-Chief, the 53 members of the editorial board and the publisher MDPI, this journal [...] Full article
Open AccessArticle
Correction and Validation of Time-Critical Behavioral Measurements over the Internet in the Stage Twin Cohort with More Than 7000 Participants
Psych 2020, 2(3), 128-152; https://doi.org/10.3390/psych2030012 - 01 Jul 2020
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Abstract
Behavioral data are increasingly collected over the Internet. This is particularly useful when participants’ own computers can be used as they are, without any modification that relies on their technical skills. However, the temporal accuracy in these settings is generally poor, unknown, and [...] Read more.
Behavioral data are increasingly collected over the Internet. This is particularly useful when participants’ own computers can be used as they are, without any modification that relies on their technical skills. However, the temporal accuracy in these settings is generally poor, unknown, and varies substantially across different hard- and software components. This makes it dubious to administer time-critical behavioral tests such as implicit association, reaction time, or various forms of temporal judgment/perception and production. Here, we describe the online collection and subsequent data quality control and adjustment of reaction time and time interval production data from 7127 twins sourced from the Swedish Twin Registry. The purposes are to (1) validate the data that are already and will continue to be reported in forthcoming publications (due to their utility, such as the large sample size and the twin design) and to (2) provide examples of how one might engage in post-hoc analyses of such data, and (3) explore how one might control for systematic influences from specific components in the functional chain. These possible influences include the type and version of the operating system, browser, and multimedia plug-in type Full article
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