Modelling Norm Scores with the cNORM Package in R

Gary, Sebastian; Lenhard, Wolfgang; Lenhard, Alexandra

doi:10.3390/psych3030033

Cited by 12 publications

(9 citation statements)

References 18 publications

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“…Lastly, as a supplemental analysis, according to previous studies procedures (Dakanalis et al, 2013), a "general sample" of patients with cancer was created by merging the sample of Study 1 and the sample of Study 2 (N total = 1153). Thus, according to the procedure described by Gary et al (2021), normative scores (T-scores) of the PDI-R were computed as well as the distribution percentiles of its total score Gary et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

Screening for Distress in Oncological Patients: The Revised Version of the Psychological Distress Inventory (PDI-R)

et al. 2022

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BackgroundPsychological research in oncological settings is steadily increasing and the construct of psychological distress has rapidly gained popularity—leading to the development of questionnaires aimed at its measurement. The Psychological Distress Inventory (PDI) is one of the most used instruments, but its psychometric properties were not yet deeply evaluated. The present studies aimed at investigating the psychometric properties of the PDI (Study 1) and providing a revised version of the tool (Study 2).MethodsOncological outpatients were enrolled at the Department of Medical Oncology of the Presidio Ospedaliero of Saronno, ASST Valle Olona, Italy. For the first study (N = 251), an Exploratory Graph Analysis was used to explore the item structure of the PDI. In the second study (N = 902), the psychometric properties of the revised PDI (PDI-R) were deeply assessed.ResultsStudy 1 showed that the PDI has a not clear structure and it should be reconsidered. On the opposite, Study 2 showed that the revised version (PDI-R) has a solid factorial structure, it is invariant across gender and age, and it has good psychometric properties.ConclusionResults suggest that the PDI-R is a reliable measure of psychological distress in different samples of oncological patients, with stronger psychometric properties than the original version. Its use in the clinical and research field is therefore recommended to improve the quality of both assessment and treatment of psychological distress in patients with oncological problems.

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Section: Discussionmentioning

confidence: 99%

Screening for Distress in Oncological Patients: The Revised Version of the Psychological Distress Inventory (PDI-R)

et al. 2022

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“…In order to create population norms, we used the polynomial regression to capture three dimensional relationships between norm score, explanatory variable (i.e. age) and expected raw score of the OASIS [51]. Descriptive and inferential statistics procedures were done in R [Version 4.1.3; [52]] using the following libraries: lavaan [53], papaja [54] psych [55], usf [56],…”

Section: Discussionmentioning

confidence: 99%

A Czech version of the Overall Anxiety Severity and Impairment Scale (OASIS): Standardization and psychometric properties

Mikoska¹,

Novák²,

Pilárik³

et al. 2022

Preprint

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Background - The Overall Anxiety Severity and Impairment Scale (OASIS) is a transdiagnostic measure that assesses severity and impairment associated with anxiety disorders. However, its psychometric properties were primarily examined in English-speaking or western countries. Therefore, this study aims to examine its psychometric parameters in the Czech Republic.Methods - A large representative sample (n=1769), a clinical sample (n=60) and a retest sample (n=20) were used. In addition to the OASIS, conventional measures of anxiety, depression, personality traits, self-esteem, life satisfaction, and other scales were also administered. Moreover, we examined the latent structure, reliability, validity, and the cut-off score for the Reliable Change Index (RCI) and the Clinically Significant Change Index (CSI).Results - Higher anxiety was found in females, religious non-church members, and students. The Confirmatory Factor Analysis supported the adequate fit of the unidimensional solution: x2(4)=3.20; p<0.525; CFI=1.000; TLI=1.000;RMSEA=0, SRMR=0. The measurement equivalence examination indicated that the OASIS measures anxiety invariantly between males and females. The validity of the OASIS was supported by positive associations with neuroticism, depression, perceived stress, guilt, shame, and the established anxiety measures. The internal consistency was excellent (Cronbach’s alpha=0.96, McDonald’s omega=0.96). The test-retest reliability was acceptable (r=0.66). The cut-off for the CSI is 6 and the RCI is 5.32.Limitations - The main limitation is the use of self-report questionnaires for validity testing and lower test-retest reliability.Conclusions - The OASIS represents a reliable and valid instrument for assessing anxiety. Due to its shortness, excellent psychometric properties and percentile norms, it is especially useful for short and accurate screening of anxiety and mapping therapeutic changes in clinical practice.

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“…In Gary et al [27], it is explained how to model norm scores with the R package cNORM. The cNORM package is designed to determine norm scores when the latent ability to be measured varies with age or other explanatory variables.…”

Section: Large-scale Assessment Methodologymentioning

confidence: 99%

“…The cNORM package is designed to determine norm scores when the latent ability to be measured varies with age or other explanatory variables. Gary et al [27] briefly introduce the statistical modeling behind the implementation and apply their proposed method using a real dataset from a reading comprehension test.…”

Section: Large-scale Assessment Methodologymentioning

confidence: 99%

Editorial of the Psych Special Issue “Computational Aspects, Statistical Algorithms and Software in Psychometrics”

Robitzsch

2022

Psych

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Modelling Norm Scores with the cNORM Package in R

Cited by 12 publications

References 18 publications

Screening for Distress in Oncological Patients: The Revised Version of the Psychological Distress Inventory (PDI-R)

Screening for Distress in Oncological Patients: The Revised Version of the Psychological Distress Inventory (PDI-R)

A Czech version of the Overall Anxiety Severity and Impairment Scale (OASIS): Standardization and psychometric properties

Editorial of the Psych Special Issue “Computational Aspects, Statistical Algorithms and Software in Psychometrics”

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