Distinct Visual Cues Mediate Aperture Shaping for Grasping and Pantomime-Grasping Tasks

The authors examined whether the top-down requirements of dissociating the spatial relations between stimulus and response in a goal-directed grasping task renders the mediation of aperture trajectories via relative visual information. To address that issue, participants grasped differently sized target objects (i.e., grasping condition) and also grasped to a location that was dissociated from the target object (i.e., pantomime-grasping condition). Just noticeable difference (JND) values associated with the early through late stages of aperture shaping were computed to examine the extent to which motor output adhered to, or violated, the psychophysical principles of Weber's law. As expected, JNDs during the late stages of the grasping condition violated Weber's law: a result evincing the use of absolute visual information. In contrast, JNDs for the pantomime-grasping condition produced a continuous adherence to Weber's law. Such a result indicates that dissociating a stimulus from a response is a perception-based task and results in aperture shaping via relative visual information.     

Reporting Diagnostic Scores in Educational Testing: Temptations,Pitfalls, and Some Solutions

Diagnostic scores are of increasing interest in educational testing due to their potential remedial and instructional benefit. Naturally, the number of educational tests that report diagnostic scores is on the rise, as are the number of research publications on such scores. This article provides a critical evaluation of diagnostic score reporting in educational testing. The existing methods for diagnostic score reporting are discussed. A recent method (Haberman, 2008a Haberman, S. J. 2008a. When can subscores have value?. Journal of Educational and Behavioral Statistics, 33: 204–229. [Crossref], [Web of Science ®] , [Google Scholar]) that examines if diagnostic scores are worth reporting is reviewed. It is demonstrated, using results from operational and simulated data, that diagnostic scores have to be based on a sufficient number of items and have to be sufficiently distinct from each other to be worth reporting and that several operationally reported subscores are actually not worth reporting. Several recommendations are made for those interested to report diagnostic scores for educational tests.     

Development of an Interactive Decision Aid for Female BRCA1/BRCA2 Carriers

Shared decision making between patients and providers is becoming increasingly common, particularly when there is no clear preferred course of action. As a result, decision aids are being adopted with growing frequency and have been applied to many medical decision-making issues. One such issue where there is uncertainty is breast cancer risk management among BRCA1/BRCA2 carriers. We present the development of a CD-ROM decision aid to facilitate risk management decision making in this population. Our decision aid was developed with the intention of providing it through a randomized clinical trial. The CD-ROM is a multimedia, interactive intervention which provides information about breast cancer, risks associated with BRCA1 and BRCA2 mutations, risk management options for hereditary breast cancer, and a breast cancer risk management decision aid. The goal of this CD-ROM, offered as an adjunctive intervention, is to reduce decisional conflict and psychological distress and improve comprehension of risk information, decisional satisfaction, medical adherence, and quality of life for this population of women at increased risk for breast cancer.     

Reporting of Subscores Using Multidimensional Item Response Theory

Recently, there has been increasing interest in reporting subscores. This paper examines reporting of subscores using multidimensional item response theory (MIRT) models (e.g., Reckase in Appl. Psychol. Meas. 21:25–36, 1997; C.R. Rao and S. Sinharay (Eds), Handbook of Statistics, vol. 26, pp. 607–642, North-Holland, Amsterdam, 2007; Beguin & Glas in Psychometrika, 66:471–488, 2001). A MIRT model is fitted using a stabilized Newton–Raphson algorithm (Haberman in The Analysis of Frequency Data, University of Chicago Press, Chicago, 1974; Sociol. Methodol. 18:193–211, 1988) with adaptive Gauss–Hermite quadrature (Haberman, von Davier, & Lee in ETS Research Rep. No. RR-08-45, ETS, Princeton, 2008). A new statistical approach is proposed to assess when subscores using the MIRT model have any added value over (i)  the total score or (ii)  subscores based on classical test theory (Haberman in J. Educ. Behav. Stat. 33:204–229, 2008; Haberman, Sinharay, & Puhan in Br. J. Math. Stat. Psychol. 62:79–95, 2008). The MIRT-based methods are applied to several operational data sets. The results show that the subscores based on MIRT are slightly more accurate than subscore estimates derived by classical test theory.     

Sexual quality of life in patients undergoing coronary artery bypass graft surgery

Objectives: Despite improvements in many domains of functioning, sexual quality of life often remains impaired following coronary artery bypass graft (CABG) surgery. This study examined associations among sexual quality of life, fear of sexual activity and receiving information from providers about sexual activity in CABG patients.

Methods: Participants completed a survey assessing sexual activity, mental health and physical health at baseline (3–5-day post-surgery; n?=?60) and 2-month post-surgery (n?=?42).

Results: Sexual quality of life showed moderate difficulties at baseline and did not improve by follow-up (p values ≥0.09). At follow-up, greater patient fear was associated with lower sexual quality of life in some domains; receiving information was related to lower fear (p values ≤0.03) and greater sexual satisfaction and interest (p values ≤0.04). Suggestive of mediation, there was a significant indirect effect of information on patient fear and of patient fear on sexual interest (p?=?0.05).

Conclusions: Though data were cross-sectional, findings suggest that fears of sexual activity may play a role in lowering CABG patients’ motivation for sexual activity and that receiving information from a medical provider may assist in hastening sexual rehabilitation. Prospective and intervention studies are needed to support findings.     

Assessing Item Fit for Unidimensional Item Response Theory Models Using Residuals from Estimated Item Response Functions

Residual analysis (e.g. Hambleton & Swaminathan, Item response theory: principles and applications, Kluwer Academic, Boston, 1985; Hambleton, Swaminathan, & Rogers, Fundamentals of item response theory, Sage, Newbury Park, 1991) is a popular method to assess fit of item response theory (IRT) models. We suggest a form of residual analysis that may be applied to assess item fit for unidimensional IRT models. The residual analysis consists of a comparison of the maximum-likelihood estimate of the item characteristic curve with an alternative ratio estimate of the item characteristic curve. The large sample distribution of the residual is proved to be standardized normal when the IRT model fits the data. We compare the performance of our suggested residual to the standardized residual of Hambleton et al. (Fundamentals of item response theory, Sage, Newbury Park, 1991) in a detailed simulation study. We then calculate our suggested residuals using data from an operational test. The residuals appear to be useful in assessing the item fit for unidimensional IRT models.     

Group CBT for Externalizing Disorders in Urban Schools: Effect of Training Strategy on Treatment Fidelity and Child Outcomes

Public schools are an ideal setting for the delivery of mental health services to children. Unfortunately, services provided in schools, and more so in urban schools, have been found to lead to little or no significant clinical improvements. Studies with urban school children seldom report on the effects of clinician training on treatment fidelity and child outcomes. This study examines the differential effects of two levels of school-based counselor training: training workshop with basic consultation (C) vs. training workshop plus enhanced consultation (C +) on treatment fidelity and child outcomes. Fourteen school staff members (counselors) were randomly assigned to C or C +. Counselors implemented a group cognitive behavioral therapy protocol (Coping Power Program, CPP) for children with or at risk for externalizing behavior disorders. Independent coders coded each CPP session for content and process fidelity. Changes in outcomes from pre to post were assessed via a parent psychiatric interview and interviewer-rated severity of illness and global impairment. Counselors in C + delivered CPP with significantly higher levels of content and process fidelity compared to counselors in C. Both C and C + resulted in significant improvement in interviewer-rated impairment; the conditions did not differ from each other with regard to impairment. Groups did not differ with regard to pre- to- posttreatment changes in diagnostic severity level. School-based behavioral health staff in urban schools are able to implement interventions with fidelity and clinical effectiveness when provided with ongoing consultation. Enhanced consultation resulted in higher fidelity. Enhanced consultation did not result in better student outcomes compared to basic consultation. Implications for resource allocation decisions with staff training in EBP are discussed.     

Psychometric Evaluation of the Parentification Inventory–Swahili Version With Kenyan Adults: Factor Structure,Reliability, and Validity

The immediate concerns and aftereffects of parentification in the United States are well documented. However, the correlates of parentification in international communities are less known. This psychometric study explored the validity of a Swahili version of the Parentification Inventory (PI; Hooper, 2009) with a sample of 279 Kenyan adults. Factor analysis produced a 3-factor structure, but with fewer items (N = 17) than in the original PI (N = 22). Recommendations for using the PI–Swahili Version are discussed. Las preocupaciones inmediatas y las secuelas de la parentificación en los Estados Unidos están bien documentadas. Sin embargo, las correlaciones de la parentificación en comunidades internacionales son menos conocidas. Este estudio psicométrico exploró la validez de una versión en suajili del Inventario de Parentificación (PI, por sus siglas en inglés; Hooper, 2009) en una muestra de 279 kenianos adultos. El análisis factorial produjo una estructura de 3 factores, pero con menos elementos (N = 17) que en el PI original (N = 22). Se discuten recomendaciones para el uso de la versión en suajili del PI.     

Limits on Log Odds Ratios for Unidimensional Item Response Theory Models

Bounds are established for log odds ratios (log cross-product ratios) involving pairs of items for item response models. First, expressions for bounds on log odds ratios are provided for one-dimensional item response models in general. Then, explicit bounds are obtained for the Rasch model and the two-parameter logistic (2PL) model. Results are also illustrated through an example from a study of model-checking procedures. The bounds obtained can provide an elementary basis for assessment of goodness of fit of these models. Any opinions expressed in this publication are those of the authors and not necessarily those of the Educational Testing Service. The authors thank Dan Eignor, Matthias von Davier, Lydia Gladkova, Brian Junker, and the three anonymous reviewers for their invaluable advice. The authors gratefully acknowledge the help of Kim Fryer with proofreading.