The latent variable approach as applied to transitive reasoning

We discuss the limitations of hypothesis testing using (quasi-) experiments in the study of cognitive development and suggest latent variable modeling as a viable alternative to experimentation. Latent variable models allow testing a theory as a whole, incorporating individual differences with respect to developmental processes or abilities in the model. Experiments, in contrast, aim at testing hypotheses that refer to a specific part of a theory; also they ignore individual differences or model the individual differences using age group as a proxy for developmental stage. Drawing on a sample of 409 5–13-year olds, we demonstrate the advantages of latent variable models in the area of transitive reasoning. A comparison of three models showed that the latent variable model that represented fuzzy trace theory had a better fit than the models representing Piaget's theory or linear ordering theory.     

Profiles of Social Anxiety and Impulsivity Among College Students: A Close Examination of Profile Differences in Externalizing Behavior

Prior work indicates the presence of a subtype of Social Anxiety (SA) characterized by disinhibition or high externalizing behaviors such as substance use and Attention Deficit Hyperactivity Disorder (ADHD) symptoms. A sample of 375 undergraduates completed an online study including measures of SA, substance use, ADHD symptoms and impulsivity. Latent class analyses revealed three classes of individuals who evidenced: (a) low SA and low impulsivity, (b) high SA and low impulsivity, and (c) high SA and high impulsivity. Individuals high in both SA and impulsivity evidenced greater likelihoods of exhibiting externalizing behavior, relative to the two other classes. Post-hoc analyses revealed the largest and most significant differences between classes were seen with regard to ADHD. This finding extends previous work by replicating distinct profiles of SA and impulsivity, and highlighting that how these profiles relate to externalizing behaviors may depend on the externalizing domain.     

Bicuspid Aortic Valve: a Review with Recommendations for Genetic Counseling

Bicuspid aortic valve (BAV) is the most common congenital heart defect and falls in the spectrum of left-sided heart defects, also known as left ventricular outflow tract obstructive (LVOTO) defects. BAV is often identified in otherwise healthy, asymptomatic individuals, but it is associated with serious long term health risks including progressive aortic valve disease (stenosis or regurgitation) and thoracic aortic aneurysm and dissection. BAV and other LVOTO defects have high heritability. Although recommendations for cardiac screening of BAV in at-risk relatives exist, there are no standard guidelines for providing genetic counseling to patients and families with BAV. This review describes current knowledge of BAV and associated aortopathy and provides guidance to genetic counselors involved in the care of patients and families with these malformations. The heritability of BAV and recommendations for screening are highlighted. While this review focuses specifically on BAV, the principles are applicable to counseling needs for other LVOTO defects.     

The influence of exploration mode, orientation, and configuration on the haptic Müller-Lyer illusion

We studied the impact of manner of exploration, orientation, spatial position, and configuration on the haptic Müller-Lyer illusion. Blindfolded sighted subjects felt raised-line Müller-Lyer and control stimuli. The stimuli were felt by tracing with the index finger, free exploration, grasping with the index finger and thumb, or by measuring with the use of any two or more fingers. For haptic judgments of extent a sliding tangible ruler was used. The illusion was present in all exploration conditions, with overestimation of the wings-out compared to wings-in stimuli. Tracing with the index finger reduced the magnitude of the illusion. However, tracing and grasping induced an overall underestimation of size. The illusion was greatly attenuated when stimuli were felt with the index fingers of both hands. Illusory misperception was not altered by the position in space of the Müller-Lyer stimuli. No effects of changes in the thickness of the line shaft were found, but there were effects of the length of the wing endings for the smaller, 5.1 cm stimuli. The theoretical and practical implications of the results are discussed.     

The role of friends in career compromise: Same-gender friendship intensifies gender differences in educational choice

We propose a mechanism of how the desire to maintain friendships can intensify gender differences in educational choice. The required conditions for this mechanism would be that (1) adolescent males and females differ in their overall educational preferences, (2) wanting to stay close to friends motivates some adolescents to adjust their educational choice in line with their friends' choices, and (3) adolescents have a higher share of same-gender, than other-gender, friends. Study 1 confirmed that these criteria were met, and Study 2 found an association between friendship priority and gender typed field of study. In conclusion, adjusting educational choices in order to maintain friendships put adolescents at risk of compromising their true career interests, and also becomes an obstacle to a gender balanced labor market.     

Treatment Fidelity of a Randomized Controlled Trial for Suicidal Risk

Treatment fidelity is a crucial consideration within randomized controlled trials (RCTs). The present study relies on data from a feasibility RCT conducted with 62 treatment-seeking suicidal college students. Issues of experimental fidelity were germane in this investigation because the same clinicians provided both the experimental (the Collaborative Assessment and Management of Suicidality—CAMS) and the control (treatment as usual—TAU) care. The first aim of the current study was to determine adherence to the CAMS model within the experimental (CAMS) and control (TAU) treatment conditions. A second exploratory aim was included to examine how treatment fidelity impacted treatment outcomes (i.e., depression, suicidal ideation, hopelessness, and potential treatment moderators). The CAMS Rating Scale (CRS.3-R) was used to determine treatment adherence to the CAMS model and to ensure between-group fidelity within the trial. The CRS.3-R was completed throughout the course of care based on reviews of a selected number of video recordings of both CAMS and TAU sessions to measure treatment fidelity. Mean CRS.3-R scores revealed differences across treatment conditions such that clinicians were successfully able to provide each treatment separately without contamination. Further, higher CRS.3-R scores in CAMS sessions resulted in decreased hopelessness over the treatment period. Higher CRS.3-R scores in TAU sessions resulted in an increased likelihood of suicidal ideation and less reduction in hopelessness over the treatment period. Overall, clinicians can serve as their own controls in a RCT and levels of adherence to the CAMS model have different effects on suicidal ideation and hopelessness.

     

The Genetic Counselor in the Pediatric Arrhythmia Clinic: Review and Assessment of Services

There are minimal data on the impact of genetic counselors in subspecialty clinics, including the pediatric arrhythmia clinic. This study aimed to describe the clinical encounters of a genetic counselor integrated into a pediatric arrhythmia clinic. In the 20 months between July 2015 and February 2017, a total of 1914 scheduled patients were screened for indications relevant for assessment by a genetic counselor. Of these, the genetic counselor completed 276 patient encounters, seeing 14.4% of all patients in clinic. The most expected and common indications for genetic counselor involvement were related to suspicion for primary heritable arrhythmia conditions, though patients seen in this clinic display a wide range of cardiac problems and many additional indications for genetic evaluation were identified. Roughly 75% (211/276) of encounters were for personal history of confirmed/suspected heritable disease, including cardiac channelopathies, cardiomyopathies, ventricular arrhythmias, and congenital heart defects, and 25% (65/276) were for family history of disease, including long QT syndrome and sudden unexplained death. Overall, this study shows that about 1 in 7 patients seen in a pediatric arrhythmia clinic have indications that likely benefit from genetic counselor involvement and care. Similar service delivery models embedding genetic counselors in pediatric arrhythmia clinics should be encouraged, and this model could be emulated to increase patient access to genetic counseling services.