Missing values at the end of a test typically are the result of test takers running out of time and can as such be understood by studying test takers’ working speed. As testing moves to computer-based assessment, response times become available allowing to simulatenously model speed and ability. Integrating research on response time modeling with research on modeling missing responses, we propose using response times to model missing values due to time limits. We identify similarities between approaches used to account for not-reached items (Rose et al. in ETS Res Rep Ser 2010:i–53, 2010) and the speed-accuracy (SA) model for joint modeling of effective speed and effective ability as proposed by van der Linden (Psychometrika 72(3):287–308, 2007). In a simulation, we show (a) that the SA model can recover parameters in the presence of missing values due to time limits and (b) that the response time model, using item-level timing information rather than a count of not-reached items, results in person parameter estimates that differ from missing data IRT models applied to not-reached items. We propose using the SA model to model the missing data process and to use both, ability and speed, to describe the performance of test takers. We illustrate the application of the model in an empirical analysis.
This article traces the development of vocational psychology in the Republic of Singapore from 1985 to 1997. It reviews both published and unpublished research studies on vocational psychology, including studies of career development, interests, sex-stereotyping in career choice, work values, and job satisfaction. Based on empirical data, the article examines the influences of home and school on the career development of adolescents and reviews experimental studies on various career guidance practices. The article concludes with suggestions for the future development of vocational psychology in Singapore. 相似文献
When thinking about the future of the genetic counseling field, one place to start is with prospective genetic counseling graduate school applicants. Although resources and mentorship opportunities exist for genetic counselors entering the field, the process of deciding on a career, applying to graduate programs, and being admitted can be daunting. As members of the profession, we should take responsibility for ensuring that individuals have the information and resources necessary to make an educated decision about whether genetic counseling is the correct path for them and to take the initial steps along this path. In this article, we present our Genetic Counseling Boot Camp as a model for other genetic counselors to use in developing their own local programs. This type of program can benefit prospective genetic counselors as they begin their professional journeys and can also provide value for the organizers and presenters who are already seasoned in the field. 相似文献
A research model incorporating hospital restructuring stressors, job satisfaction, psychosomatic symptoms and active and escapist coping was tested in a large sample of nursing staff. Almost 1,400 staff nurses participated by completing anonymous questionnaires. Concepts in the model were assessed using multiple-item scales having satisfactory psychometric properties. A LISREL analysis was undertaken in which relationships among all variables in the model were considered simultaneously. Use of active coping was negatively related to the use of escapist coping; use of escapist coping was positively related to future threats to security and psychosomatic symptoms and negatively related to self-reported job satisfaction; use of active coping was related to perceptions of less extensive hospital restructuring, greater job satisfaction, and fewer psychosomatic symptoms. 相似文献
We compared 118 egalitarian women (subscribers to the Dutch feminist magazine Opzij ) with 118 traditional women (subscribers to the widely read Dutch women's magazine Margriet ). On average, egalitarian women had a more equal division of household labor at home than did traditional women but experienced more discontent about the division of labor in their relationship. Egalitarian women with an unequal division of labor experienced more discontent than did traditional women with an unequal division of labor. Relative to traditional women, egalitarian women more often compared their own contribution to housework with their partner's contribution (relational comparison) and with other women's division of labor (referential comparison). Compared to traditional women, egalitarian women gave higher prevalence estimates of both the percentage of Dutch women doing virtually all housework and the percentage of women unhappy with the division of labor. 相似文献
This study examines some antecedents and consequences of social identification in military units. Data were collected from 2 samples in each unit: staff members and soldiers. It was found that identification with the unit was related to 3 categories of leader behavior: an emphasis on collective identity, an emphasis on shared values, and inclusive behaviors. Some of the effects of leader behaviors on members' social identification were mediated by their effects on unit culture. Some of the effects of leader behaviors on the social identification of more distant subordinates (soldiers) were mediated by their effects on the social identification of closer subordinates (staff members). Differential effects of leader behaviors on the 2 levels of subordinates were also discovered. 相似文献