#statstab #333 {easyRasch} R package for Rasch analysis
Thoughts: Not my cup of tea. But useful package. Useful vignettes also.
#r #rasch #measurement #questionnaire #survey
https://pgmj.github.io/raschrvignette/RaschRvign.html#ordinal-sum-score-to-interval-score
A post by Julia Rohrer on 🟦 had me revisit one of my earlier studies in which we used Mixed #Rasch Models to identify response styles in a personality questionnaire and then investigate differential item functioning across gender* groups.
https://econtent.hogrefe.com/doi/10.1027/1614-0001/a000102
Overall, the DIF results were consistent and gender-DIF and response styles likely independently influenced item responses.
*Published 2013, i.e. we would probably approach that part with a bit more nuance today.
Mirjam Mesak, soprano, Emily d’Angelo, alto, Christopher Sokolowski, tenor, Christof Fischesser, bass, and the Berlin Radio Choir and Symphony Orchestra conducted by Vladimir Jurowski perform: Torsten RASCH: Pataphor, world premiere. BEETHOVEN:...
Mirjam Mesak, soprano, Emily d’Angelo, alto, Christopher Sokolowski, tenor, Christof Fischesser, bass, and the Berlin Radio Choir and Symphony Orchestra conducted by Vladimir Jurowski perform: Torsten RASCH: Pataphor, world premiere. BEETHOVEN:...
Mirjam Mesak, soprano, Emily d’Angelo, alto, Christopher Sokolowski, tenor, Christof Fischesser, bass, and the Berlin Radio Choir and Symphony Orchestra conducted by Vladimir Jurowski perform: Torsten RASCH: Pataphor, world premiere. BEETHOVEN:...
Moin ☕ Dieser Artikel aus dem Ruhrpott motiviert vielleicht ein bisschen. Zu einer Suche in #Bremen ganz oben: Seit 2 Jahren hier im Norden im Bau, der Radschnellweg #RASCH von Verden her.
I will be giving a pre-conference workshop on #Rasch analysis using R and Quarto, focused on the package I developed, RISEkbmRasch, at the 1st Scandinavian Applied #Measurement Conference on the 12th of June.
https://www.hkr.se/en/collaboration/samc2024/pre-conference/
New paper out on the Perceived Stress Scale! The PSS is a very commonly (mis)used measure, and our analysis clearly shows the need for changing how it is used.
https://doi.org/10.1186/s12888-023-05162-4
#openaccess #openscience #opendata #psychometrics #rasch #measurement #stress
First, only the negative items actually assess stress and work together as a unidimensional scale. This means a shorter scale, 7 items from the PSS-14 (6 items from PSS-10).
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Background Stress reflects physical and psychological reactions to imposing demands and is often measured using self-reports. A widely-used instrument is the Perceived Stress Scale (PSS), intended to capture more general aspects of stress. A Swedish translation of the PSS is available but has not previously been examined using modern test theory approaches. The aim of the current study is to apply Rasch analysis to further the understanding of the PSS’ measurement properties, and, in turn, improve its utility in different settings. Methods Data from 793 university students was used to investigate the dimensionality of different version of the PSS (14, 10, and 4 items) as well as potential response patterns among the participants. Results The current study demonstrates that the PSS-14 has two separate factors, divided between negatively worded items (perceived stress) and positively worded items (perceived [lack of] control), although with only the negative subscale exhibiting good reliability. Response patterns were analyzed using Differential Item Functioning, which did not find an influence of gender on any of the items, but for age regarding the positive subscale (items 6 and 9). The PSS-10 also demonstrated adequate reliability for the negative subscale, but the PSS-4 was not deemed suitable as a unidimensional scale. Conclusions Based on the results, none of the versions of the PSS should be used by sum-scoring all of the items. Only the negative items from the PSS-14 or PSS-10 can be used as unidimensional scales to measure general aspects of stress. As for different response patterns, gender may nevertheless be important to consider, as prior research has found differences on several items. Meanwhile, content validity is discussed, questioning the relevance of anger and being upset when measuring more general aspects of stress. Finally, a table to convert the PSS-7 (i.e., negative items) ordinal sum scores to interval level scores is provided.
@jrboehnke Yes, these are great. I make use of the catR::thetaEst() function in my #Rasch #rstats package.
I currently do a lot of work with public health (youth/school) surveys and really recognize the disconnect you mention. The norm seems to be dichotomization of single items and arbitrary "index" creation based on multiple items, scaled to 0-100.
I've documented (in Swedish, unfortunately) extensive psychometrics for a school survey (with R-code but no data): https://pgmj.github.io/sthlmsenk/
Dr Mircea Zloteanu 🌺🌞🍃
Jan R. Boehnke
World Concert Hall
Magnus Johansson
Patrick Schmidt
