CAT for Personality Items Zeitschrift für Psychologie

Abstract. A computerized adaptive testing (CAT) procedure was simulated with ordinal polytomous personality data collected using a conventional paper-and-pencil testing format. An adapted Dutch version of the dominance scale of Gough and Heilbrun's Adjective Check List (ACL) was used. This version contained Likert response scales with five categories. Item parameters were estimated using Samejima's graded response model from the responses of 1,925 subjects. The CAT procedure was simulated using the responses of 1,517 other subjects. The value of the required standard error in the stopping rule of the CAT was manipulated. The relationship between CAT latent trait estimates and estimates based on all dominance items was studied. Additionally, the pattern of relationships between the CAT latent trait estimates and the other ACL scales was compared to that between latent trait estimates based on the entire item pool and the other ACL scales. The CAT procedure resulted in latent trait estimates qualitatively equivalent to latent trait estimates based on all items, while a substantial reduction of the number of used items could be realized (at the stopping rule of 0.4 about 33% of the 36 items was used)

Data from ‘Cohort Differences in Big Five Personality Factors Over a Period of 25 Years’

This data set comprises of scores of 8,954 psychology freshmen from the University of Amsterdam (1982-2007) on the ‘Vijf PersoonlijkheidsFactoren Test’ or 5PFT developed by Elshout and Akkerman, which is an instrument to measure the Big Five personality factors Extraversion, Agreeableness, Conscientiousness, Neuroticism, and Openness to Experience. Data were collected during the yearly freshmen-testing program from 1982-2007 and include scores at the level of 70 items that can be used in studies of psychometrics and the nature of personality

Cohort Differences in Big Five Personality Factors Over a Period of 25 Years

This dataset comprises scores of 8,954 first-year psychology students from the University of Amsterdam (1982-2007) on the ‘Vijf PersoonlijkheidsFactoren Test’ or 5PFT (Elshout & Akkerman, 1975), which is an instrument to measure the Big Five personality factors Extraversion, Agreeableness, Conscientiousness, Neuroticism, and Openness to Experience. Selection of participants as described in Smits et al. on page 1126 and in their Table 1. This dataset formed the basis of the article "Cohort Differences in Big Five Personality Factors Over a Period of 25 Years" (See the link to the DOI in the Relationfield) authored by Iris A. M. Smits, Conor V. Dolan, Harrie C.M. Vorst, Jelte M. Wicherts, & Marieke E. Timmerman. A data paper about this data is available at: Smits, Iris A. M., Dolan, C. V., Vorst, H. C. M., Wicherts, J M., Timmerman, M. E. Data from ‘Cohort Differences in Big Five Personality Factors Over a Period of 25 Years’. Journal of Open Psychology Data 1(1). (See the link to the DOI in the Relationfield) This data is released under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited