Differential supervision and cognitive structure effects on empathy and counseling effectiveness

The present study investigated the effects of didactic and experiential supervision procedures on the judged counseling effectiveness of high and low cognitive complexity counselor trainees. Subjects in the two supervision groups (N=16) were trained in attending, questioning, and reflection of feeling over three sessions. Training consisted of exposure to videotaped counseling models, discussion of the model's behavior with the supervisor, videotaped role playing of therapy, and discussion of the therapy with the supervisor. Training was exactly the same for both groups except for supervision. A control group (N=8) did not receive any training. All subjects, including controls, were pre- and post-tested for counseling effectiveness as measured by judged tape ratings on the 25-item Counselor Effectiveness Scale and four scales designed to assess affective, exploratory, listening, and honest labeling responses.High complex subjects responsed more favorably to the didactic supervision significantly outperforming both the high complex controls and the low complex didactic subjects on four of the five dependent measures, whereas high and low complex subjects did not respond differentially to the experiential supervision. The results were discussed in terms of fitting the complexity of the students to the supervision approach in selecting students for counseling programs.This paper was presented at the International Round Table for the Advancement of Counselling, Thessaloniki, Greece, April 1980, and was based partly on the senior author's doctoral disser tation (University of Maine, 1978).     

Personality Traits Are Associated With Cortical Development Across Adolescence: A Longitudinal Structural MRI Study

How personality traits relate to structural brain changes in development is an important but understudied question. In this study, cortical thickness (CT) and surface area (SA), estimated using magnetic resonance imaging (MRI), were investigated in 99 participants aged 8–19 years. Follow‐up MRI data were collected after on average 2.6 years for 74 individuals. The Big Five personality traits were related to longitudinal regional CT or SA development, but limited cross‐sectional relations were observed. Conscientiousness, emotional stability, and imagination were associated with more age‐expected cortical thinning over time. The results suggest that the substantial individual variability observed in personality traits may partly be explained by cortical maturation across adolescence, implying a developmental origin for personality–brain relations observed in adults.     

Effect of seasonality on the dynamical behavior of an ecological system with impulsive control strategy

In this paper, on the basis of the theories and methods of ecology and ordinary differential equation, an ecological model consisting of two preys and one predator with impulsive control strategy and seasonal effects is established. Conditions which guarantee the global asymptotical stability of the prey-eradication periodic solution are obtained using the theory of impulsive equations, small amplitude perturbation skills, and comparison techniques. Further, the influences of the impulsive perturbation and seasonal effects on the inherent oscillation are studied numerically. These show to be consistent with the theoretical analysis and rich complex population dynamics, such as species extinction and permanence. Moreover, the population dynamical behavior of the model is demonstrated by the computed largest Lyapunov exponent. By investigating the strange attractors through their computed Fourier spectra, we know that seasonality has a profound effect on the population dynamical behavior. All these results are expected to be of use in the study of dynamic complexity of ecosystems.     

Size-dependent trajectories of DNA macromolecules due to insulative dielectrophoresis in submicrometer-deep fluidic channels

In this paper, we demonstrate for the first time that insulative dielectrophoresis can induce size-dependent trajectories of DNA macromolecules. We experimentally use λ (48.5 kbp) and T4GT7 (165.6 kbp) DNA molecules flowing continuously around a sharp corner inside fluidic channels with a depth of 0.4 μm. Numerical simulation of the electrokinetic force distribution inside the channels is in qualitative agreement with our experimentally observed trajectories. We discuss a possible physical mechanism for the DNA polarization and dielectrophoresis inside confining channels, based on the observed dielectrophoresis responses due to different DNA sizes and various electric fields applied between the inlet and the outlet. The proposed physical mechanism indicates that further extensive investigations, both theoretically and experimentally, would be very useful to better elucidate the forces involved at DNA dielectrophoresis. When applied for size-based sorting of DNA molecules, our sorting method offers two major advantages compared to earlier attempts with insulative dielectrophoresis: Its continuous operation allows for high-throughput analysis, and it only requires electric field strengths as low as ∼10 V∕cm.