Optimal Designs for the Rasch Model

In this paper, optimal designs will be derived for estimating the ability parameters of the Rasch model when difficulty parameters are known. It is well established that a design is locally D-optimal if the ability and difficulty coincide. But locally optimal designs require that the ability parameters to be estimated are known. To attenuate this very restrictive assumption, prior knowledge on the ability parameter may be incorporated within a Bayesian approach. Several symmetric weight distributions, e.g., uniform, normal and logistic distributions, will be considered. Furthermore, maximin efficient designs are developed where the minimal efficiency is maximized over a specified range of ability parameters.     

Coping variables as predictors of perioperative emotional states and adjustment

Abstract

Surgery, regardless of its kind and severity, can be regarded as a major stress situation for any patient. High preoperative emotional arousal may negatively influence adaptation during surgery and, consequently, rate of postoperative recovery. In a series of previous studies, our research group analyzed the influence of dispositional and actual coping on subjective and objective stress indicators before, during, and after surgery. The present study investigates the influence of the dispositional coping variables vigilance and cognitive avoidance on actual surgery-related coping, state anxiety, and indicators of intra- and postoperative adjustment. The sample consisted of 42 male and 42 female patients undergoing elective maxillofacial surgery under general anaesthesia. Dispositional coping was measured on the dimensions vigilance and cognitive avoidance with the Mainz Coping Inventory. Actual surgery-related coping was assessed by means of a newly constructed inventory containing items to measure the four dimensions avoidance, vigilance, positive restructuring, and seeking social support.

Self-reported state anxiety was differentiated according to the cognitive, affective, and somatic components. The patients' adaptation was assessed by measuring doses of the narcotic agents used for induction of anaesthesia, the intraoperative status, and the amount of postoperative (analgesic and psychotropic) medication. Significant effects of coping mode, gender, and time of measurement were observed on the cognitive, affective and somatic component of state anxiety, the indicators of intraoperative adaptation and on postoperative medication. Also, patients' actual coping behavior could partly be predicted by dispositional coping. Results indicate that actual coping behavior and gender should be taken into account when trying to predict adaptation and developing psychological preparatory intervention programs.     

Flexibilidad y demandas de capacidad de la atención

RESUMEN

El artículo presenta una teoría multimodal de la atención. Se supone que la atención es flexible, pudiendo hacer un análisis perceptual de la información de distinta profundidad. La información objetivo es seleccionada al nivel del análisis sensorial por los modos tempranos de la atención pero no lo es por los modos tardíos hasta después del análisis semántico. Mientras el sistema de análisis perceptual cambia de los modos tempranos a los tardíos, se recoge más información de las vías no-objetivo, pero requiere más capacidad para atender a la vía objetivo. El estudio comprueba con cinco experimentos los dos supuestos principales, a saber: que la atención requiere capacidad y que la cantidad de capacidad requerida se incrementa de los modos tempranos a los tardíos. En la discusión general los autores afirman que los datos apoyan estos dos supuestos de la teoría multimodal.     

Sex‐specific Differential Prediction of Academic Achievement by German Ability Tests

Tests of cognitive ability play a major role in the selection of students. Still, data regarding the fairness of standardized tests in Germany is scarce. We use three samples (N = 2,616; 58% women) from German universities to investigate the sex‐specific differential prediction of college performance based on intelligence tests. The predictive bias we find is small and in line with US‐American research. The direction of the effect depends on the cognitive ability domain investigated: Numeric test scores are prone to disadvantage women whereas verbal test scores are more likely to discriminate against men. Including high school grade point average in the prediction model can help to offset differential prediction that underestimates women's academic achievement.     

Introduction

This article reports a comprehensive meta-analysis of the criterion-oriented validity of the Big Five personality dimensions assessed with forced-choice (FC) inventories. Six criteria (i.e., performance ratings, training proficiency, productivity, grade-point average, global occupational performance, and global academic performance) and three types of FC scores (i.e., normative, quasi-ipsative, and ipsative) served for grouping the validity coefficients. Globally, the results showed that the Big Five assessed with FC measures have similar or slightly higher validity than the Big Five assessed with single-stimulus (SS) personality inventories. Quasi-ipsative measures of conscientiousness (K = 44, N = 8794, ρ = .40) are found to be better predictors of job performance than normative and ipsative measures. FC inventories also showed similar reliability coefficients to SS inventories. Implications of the findings for theory and practice in academic and personnel decisions are discussed, and future research is suggested.     

How to get really smart: Modeling retest and training effects in ability testing using computer-generated figural matrix items

The interpretation of retest scores is problematic because they are potentially affected by measurement and predictive bias, which impact construct validity, and because their size differs as a function of various factors. This paper investigates the construct stability of scores on a figural matrices test and models retest effects at the level of the individual test taker as a function of covariates (simple retest vs. training, use of identical vs. parallel retest forms, and general mental ability). A total of N = 189 subjects took two tests of matrix items that were automatically generated according to a strict construction rationale. Between test administrations, participants in the intervention groups received training, while controls did not. The Rasch model fit the data at both time points, but there was a lack of item difficulty parameter invariance across time. Training increased test performance beyond simple retesting, but there was no large difference between the identical and parallel retest forms at the individual level. Individuals varied greatly in how they profited from retest experience, training, and the use of identical vs. parallel retest forms. The results suggest that even with carefully designed tasks, it is problematic to directly compare scores from initial tests and retests. Test administrators should emphasize learning potential instead of state level assessment, and inter-individual differences with regard to test experience should be taken into account when interpreting test results.     

Unconscious phantasy as a structural principle and organizer of mental life: The evolution of a concept from Freud to Klein and some of her successors

Starting with Freud's discovery of unconscious phantasy as a means of accessing his patients’ internal world, the author discusses the evolution of the concept in the work of Melanie Klein and some of her successors. Whereas Freud sees phantasy as a wish fulfilling imagination, dominated by primary process functioning and kept apart from reality testing, Klein understands phantasies as a structural function and organizer of mental life. From their very beginnings they involve object relations and gradually evolve from primitive body‐near experiences to images and symbolic representations. With her concept of projective identification in particular, Klein anticipates the communicative function of unconscious phantasies. They are at the basis of processes of symbolization, but may also be put into the service of complex defensive operations. The author traces the further evolution of the concept from the contributions of S. Isaacs, the theories of thinking proposed by W.R. Bion and R. Money‐Kyrle, Hanna Segal's ideas on symbolization and reparation all the way to the latest approaches by R. Britton, J. Steiner and others, including the understanding of transference and counter‐transference as a ‘total situation’. Points of contact with Freud are to be found particularly in connection with his concept of ‘primal phantasies’. In the author's view, the idea of the transmission and communicative potential of unconscious phantasies enabled these authors to overcome the solipsistic origins of drive theory in favour of a notion in which unconscious phantasies both set down the coordinates of the inner world and form and reflect the matrix of inter‐subjective relations.     

Continuity and discontinuity in memory for threat

Using a paradigm that allows a quasi-continuous tracking of memory performance over time, two experiments were designed to test the hypotheses that (a) persons with a cognitively avoidant style of coping with threat manifest a dissociation between (intact) short-term and (reduced) long-term retrieval of aversive information and (b) persons with a vigilant coping style recall aversive information particularly well after long retention intervals, provided they are free to think about aversive events. Study 1 (N?=?75) showed that avoiders manifest a poor memory for aversive pictures after long retention intervals only. Study 2 (N?=?95) replicated this finding. In addition, manipulation of the cognitive load during the retention interval influenced vigilants’ recall of aversive information in the predicted way. Results indicate that processes occurring during the retention interval are essential for individual difference in memory for aversive information and require similar attention as encoding, appraisal, and retrieval processes.     

Personality, acculturation, and psychosocial adjustment of Chinese international students in Germany

The effect of personality traits and acculturation variables on crosscultural adjustment were investigated in 139 Chinese students in Germany (52% girls; M age = 25.3 yr., SD = 2.9). Participants were surveyed by house visits to their dormitories. Several scales were administered: (a) Big Five Inventory; (b) Vancouver Index of Acculturation; (c) sociocultural adjustment, general and academic; and (d) psychological adjustment, i.e., depression, self-esteem, and life satisfaction. Results showed that Neuroticism and Openness were two shared predictors of sociocultural adjustment. Agreeableness and mainstream acculturation were only related to general adjustment, while Conscientiousness was only related to academic adjustment. All facets of psychological adjustment were related to Neuroticism and Consciousness, while positive components (self-esteem and life satisfaction) were also related to Extraversion and Openness. No influence of heritage acculturation was found. The findings are discussed in light of measurement issues and the shared and unique individual predictors of the different facets of adjustment.