Associative memory in three aplysiids: correlation with heterosynaptic modulation

Much recent research on mechanisms of learning and memory focuses on the role of heterosynaptic neuromodulatory signaling. Such neuromodulation appears to stabilize Hebbian synaptic changes underlying associative learning, thereby extending memory. Previous comparisons of three related sea-hares (Mollusca, Opisthobranchia) uncovered interspecific variation in neuromodulatory signaling: strong in Aplysia californica, immeasureable in Dolabrifera dolabrifera, and intermediate in Phyllaplysia taylori. The present study addressed whether this interspecific variation in neuromodulation is correlated with memory of associative (classical conditioning) learning. We differentially conditioned the tail-mantle withdrawal reflex of each of the three species: Mild touch to one side of the tail was paired with a noxious electrical stimulus to the neck. Mild touch to the other side served as an internal control. Post-training reflex amplitudes were tested 15-30 min after training and compared with pre-test amplitudes. All three species showed conditioning: training increased the paired reflex more than the unpaired reflex. However, the temporal pattern of conditioning varied between species. Aplysia showed modest conditioning that grew across the post-test period. Dolabrifera showed distinctly short-lived conditioning, present only on the first post-test. The time course of memory in Phyllaplysia was intermediate, although not statistically distinguishable from the other two species. Taken together, these experiments suggest that evolutionary changes in nonassociative heterosynaptic modulation may contribute to evolutionary changes in the stability of the memory of classical conditioning.     

Relationship between age and aspects of depression: consistency and reliability across two longitudinal studies

In this study, the authors examined cross-sectional and longitudinal age and gender differences in each of the Center for Epidemiological Studies Depression Scale's 4 subscales of depressive symptomatology. Two independent studies (Sample 1 = 2,076; Sample 2 = 943) were used for purposes of establishing stability of findings. Results indicate a reasonable degree of stability among adults under 70 years of age. However, there were significant age-related increases in somatic symptoms and lack of well-being after approximately 70 years of age, whereas symptoms related to depressed affect and interpersonal problems remained stable. Notably, depressive affect symptoms remained stable given significant age-related somatic changes. The addition of comorbid physical illness to the analysis did not reduce the association between age and depressive symptoms, indicating that part of the association was not substantially accounted for by physical health.     

Evaluating vigilance deficits in ADHD: a meta-analysis of CPT performance

We meta-analytically review 47 between-groups studies of continuous performance test (CPT) performance in children with attention-deficit/hyperactivity disorder (ADHD). Using a random effects model and correcting for both sampling error and measurement unreliability, we found large effect sizes (δ) for overall performance, but only small to moderate δ for performance over time in the handful of studies that reported that data. Smaller δs for performance over time are likely attributable, in part, to the extensive use of stimuli for which targets and distractors are quite easily differentiated. Artifacts accounted for a considerable proportion of variance among observed δs. Effect sizes reported in previous reviews were significantly attenuated because of the presence of uncorrected artifacts and highlight the necessity of accounting for artifactual variance in future work to determine the amount of true neurocognitive heterogeneity within ADHD. Signal detection theory and diffusion modeling analyses indicated that the ADHD-related deficits were because of decreased perceptual sensitivity (d') and slower drift rates (v). Results are interpreted the context of several recent models of ADHD.     

Psychological Hardiness in Learning and Quality of College Life of Business Students: Evidence from Vietnam

Vietnam’s continuing economic transformation has sharply increased the demand for highly-qualified business graduates. Vietnamese universities have responded to this increase in demand by improving the quality of their programs and raising their performance standards. The degree to which high-quality competitive programs increase students’ satisfaction with their educational experience is determined by their psychological hardiness in learning, their learning motivation, and their assessments of the functional value of business education. This study gathered survey data from a convenience sample of 1,024 business students in Vietnam, then validated measures of four constructs: Quality of College Life, psychological hardiness in learning, learning motivation, and perceived functional value of business education. The relationships among the constructs were estimated by Structural Equation Modeling. The results demonstrate that psychological hardiness in learning and learning motivation have statistically significant positive impacts on students’ perceived Quality of College Life. The impacts are significantly stronger for students with higher assessments of the functional value of a business education. These findings suggest that universities could enhance the Quality of College Life and academic performance by offering programs to cultivate students’ psychological hardiness in learning and their learning motivation, and by providing them with objective information about the functional value of business careers.     

The Role of External Sources of Information in Children's Evaluative Food Categories

Evaluative food categories are value‐laden assessments, which reflect the healthfulness and palatability of foods (e.g. healthy/unhealthy, yummy/yucky). In a series of three studies, this research examines how 3‐ to 4‐year‐old children (N = 147) form evaluative food categories based on input from external sources of information. The results indicate that children prefer to ask a mom and teacher over a cartoon and child for information about the evaluative status of foods. However, children are cautious to accept information about healthy foods from all of the external sources compared with unhealthy, yummy and yucky foods. The results also indicate that providing information about the positive taste of healthy foods helps to encourage children to select healthy foods to eat. Taken together, these results have potential implications for children's health and nutrition education. Copyright © 2011 John Wiley & Sons, Ltd.     

Weltanschauung as a priori: sociology of knowledge from a ‘romantic’ stance

In this paper I reconstruct the central concept of the young Lukács??s and Mannheim??s sociology of knowledge, as they present it in their writings in the early decades of the twentieth century. I argue that this concept, namely Weltanschauung, is used to refer to some conceptually unstructured totality of feelings, which they take to be a condition of possibility of intellectual production, and this understanding is contrasted to an alternative construal of the term that presents it as logically structured, quasi-theoretical background knowledge. This concept has Kantian reminiscences: it is a condition of possibility of intellectual production in general. The young Mannheim and Lukács rely on ??Weltanschauung?? so understood as a phenomenon mediating between the facts of society and individual intellectual production and reception: it is seen as being conditioned by sociological facts and therefore as a historical and sociological category through which, and therefore indirectly, society enters into intellectual production.     

Psychotherapy in France: the legacy and the future

This paper looks at the present situation of psychotherapy in France. In studying the historical background to the introduction of psychoanalysis in France since the 1920s, an assumption is made about the similar changes in paradigms brought about by the emergence of a new field, whether this be psychoanalysis or psychotherapy.     

Whispering gallery mode sensor for phase transformation and solidification studies

Whispering gallery mode (WGM) sensors are created by coupling a dielectric microresonator with the evanescent field of an optical fiber. Since the sensor is created by two separate entities, most of the existing studies are limited to using them in fluid environments, such as air or water, for the ease of manipulation and placement in the optimum configuration. This work is focused on studying the possibility of using WGM sensors inside a solid material. The sensor is immersed in water, which is cooled to solid state and the sensor survival is monitored. In subsequent studies, three remelting cycles are carried out and temperature measurements are obtained through the sensor. The sensor output is calibrated with the temperature data obtained from a thermocouple. The results show that a linear relationship exists between temperature and WGM shift, which enables application of these sensors in temperature measurement. Considering that the sensitivity of WGM sensors is very high (10^?6 N force and 10^?5 K temperature), they can be used for high resolution studies on solidification in cryogenic environments.     

The search for an image of man

The present paper offers a narrative of the post-World War II development of Hungarian philosophy, and argues that it is characterized by a double, historical and anthropological orientation under Marx’s influence. The resulting amalgam is an intellectual history that looks beyond the ideas themselves, searching for underlying images of man which are represented as ideological backgrounds to theories of nature, society, cognition, etc. The most important works of this approach interpret ideas and anthropologies within a Marxist framework, and see them as closely linked to the social–historical circumstances in which they develop; yet, these approaches represent an alternative attitude quite different from the official ideology of dialectical materialism.