Conceptualizing and Measuring Personality Vulnerability to Depression: Comment on Coyne and Whiffen (1995).

J. C. Coyne and V. E. Whiffen (1995) reviewed research on personality vulnerability to depression, focusing on S. J. Blatt's (1974, 1990) concepts of dependency and self-criticism and A. T. Beck's (1983) concepts of sociotropy and autonomy. The authors discuss 6 issues raised in that review: (a) the typological or dimensional nature of vulnerability, (b) the theoretical implications of "mixed" vulnerability, (c) the relations of vulnerability to Neuroticism. (d) the potential confounding of vulnerability with concurrent depression, (e) the potential confounding of vulnerability with social context, and (f) the differentiation of dependency from relatedness. The authors conclude that Blatt's and Beck's concepts are continuous, nearly orthogonal dimensions that can be identified and measured independently from Neuroticism, depression, and social context. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Investing in the Personality Vulnerability Research Program--Current Dividends and Future Growth: Rejoinder to Coyne, Thompson, and Whiffen (2004).

The authors do not see any benefit to J. C. Coyne. R. Thompson, and V. Whiffen's (2004) proposal to draw sharp boundaries between psychodynamic vulnerability theories, research on the onset of syndromal depression, and research with vulnerable, nondepressed populations. These domains have been and remain mutually relevant. Coyne et al. did not bring forward new evidence concerning the 6 issues addressed by D. C. Zuroff. M. Mongrain. and D. A. Santor (2004); consequently, the authors stand by their conclusions. According to Lakatos (as cited in B. Gholson & P. Barker. 1985), scientists justifiably continue to invest in research programs as long as the programs remain progressive. The personality vulnerability program is theoretically and empirically progressive and merits continued investment. Nevertheless, the field would benefit if Coyne et al. articulated a systematic contextualist research program to compete with the personality research program. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Estimation of polyvinyl alcohol cryogel mechanical properties with four ultrasound elastography methods and comparison with gold standard testings

Tissue-mimicking phantoms are very useful in the field of tissue characterization and essential in elastography for the purpose of validating motion estimators. This study is dedicated to the characterization of polyvinyl alcohol cryogel (PVA-C) for these types of applications. A strict fabrication procedure was defined to optimize the reproducibility of phantoms having a similar elasticity. Following mechanical stretching tests, the phantoms were used to compare the accuracy of four different elastography methods. The four methods were based on a one-dimensional (1-D) scaling factor estimation, on two different implementations of a 2-D Lagrangian speckle model estimator (quasistatic elastography methods), and on a 1-D shear wave transient elastography technique (dynamic method). Young's modulus was investigated as a function of the number of freeze-thaw cycles of PVA-C, and of the concentration of acoustic scatterers. Other mechanical and acoustic parameters-such as the speed of sound, shear wave velocity, mass density, and Poisson's ratio-also were assessed. The Poisson's ratio was estimated with good precision at 0.499 for all samples, and the Young's moduli varied in a range of 20 kPa for one freeze-thaw cycle to 600 kPa for 10 cycles. Nevertheless, above six freeze-thaw cycles, the results were less reliable because of sample geometry artifacts. However, for the samples that underwent less than seven freeze-thaw cycles, the Young's moduli estimated with the four elastography methods showed good matching with the mechanical tensile tests with a regression coefficient varying from 0.97 to 1.07, and correlations R2 varying from 0.93 to 0.99, depending on the method.     

Entrapment and perceived status in graduate students experiencing a recurrence of major depression.

The present study used a prospective design to test the role of involuntary subordination as a predictor of major depression. Involuntary subordination is a construct derived from social rank theory and has been implicated as a cause of major depression. Its most salient features include feelings of entrapment and unfavourable social comparisons (i.e., low perceived status). An initial sample of 146 graduate students underwent a diagnostic interview to confirm a history of major depression and also completed measures of entrapment and social comparison. After 16 months, participants were assessed for a recurrence of major depression. Participants who experienced a recurrence of depression had significantly higher levels of involuntary subordination (as measured by factor scores of entrapment and social comparison). A logistic regression analysis also showed that involuntary subordination predicted recurrence of depression, even when controlling for current major depression and the number of previous episodes. The present study demonstrates the advantages of adopting a social rank perspective in modeling major depression. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Perceptual biases, affect, and behavior in the relationships of dependents and self-critics.

Aspects of interpersonal, personality, and cognitive models of depression were tested in a college sample. The perceptions and actual interpersonal behaviors of dependent and self-critical women and their romantic partners were assessed during a conflict-resolution task. Dependent women were characterized by positive biases in the perception of lovingness expressed within the relationship. The partners of dependent women, however, experienced a decrease in positive affect and a trend toward increasing hostility during the conflict-resolution task. Self-critical women were objectively rated as less loving and more hostile, and their partners were also rated as less loving. Self-critics also exhibited negative biases in self-perceptions of submissiveness. The results are interpreted within a comprehensive framework integrating various elements of interpersonal, personality, and cognitive models of depression. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Simultaneous determination of aortic valve area by the Gorlin formula and by transesophageal echocardiography under different transvalvular flow conditions. Evidence that anatomic aortic valve area does not change with variations in flow in aortic stenosis

OBJECTIVES: The purpose of this study was to determine the impact of changes in flow on aortic valve area (AVA) as measured by the Gorlin formula and transesophageal echocardiographic (TEE) planimetry. BACKGROUND: The meaning of flow-related changes in AVA calculations using the Gorlin formula in patients with aortic stenosis remains controversial. It has been suggested that flow dependence of the calculated area could be due to a true widening of the orifice as flow increases or to a disproportionate flow dependence of the formula itself. Alternatively, anatomic AVA can be measured by direct planimetry of the valve orifice with TEE. METHODS: Simultaneous measurement of the planimetered and Gorlin valve area was performed intraoperatively under different hemodynamic conditions in 11 patients. Left ventricular and ascending aortic pressures were measured simultaneously after transventricular and aortic punctures. Changes in flow were induced by dobutamine infusion. Using multiplane TEE, AVA was planimetered at the level of the leaflet tips in the short-axis view. RESULTS: Overall, cardiac output, stroke volume and transvalvular volume flow rate ranged from 2.5 to 7.3 liters/min, from 43 to 86 ml and from 102 to 306 ml/min, respectively. During dobutamine infusion, cardiac-output increased by 42% and mean aortic valve gradient by 54%. When minimal flow was compared with maximal flow, the Gorlin area varied from (mean +/- SD) 0.44 +/- 0.12 to 0.60 +/- 0.14 cm2 (p < 0.005). The mean change in Gorlin area under different flow rates was 36 +/- 32%. Despite these changes, there was no significant change in the planimetered area when minimal flow was compared with maximal flow. The mean difference in planimetered area under different flow rates was 0.002 +/- 0.01 cm2 (p = 0.86). CONCLUSIONS: By simultaneous determination of Gorlin formula and TEE planimetry valve areas, we showed that acute changes in transvalvular volume flow substantially altered valve area calculated by the Gorlin formula but did not result in significant alterations of the anatomic valve area in aortic stenosis. These results suggest that the flow-related variation in the Gorlin AVA is due to a disproportionate flow dependence of the formula itself and not a true change in valve area.     

Use of ionizing radiation to prevent restenosis in interventional cardiology

It is well known that the expression of carbohydrate chains on cell changes during the development and progression of carcinoma. Some carbohydrate chains have been used in clinical practice as tumor markers. Some, such as sialyl Lewis a (CA 19.9), sialyl Lewis X, and Tn, are known to function as adhesion molecules. However, their role in the development of hematogenous metastasis is still controversial. In this paper, many investigations concerning this issue are reviewed. Clinical trials for treatment of patients with advanced cancer using carbohydrate chains are also mentioned.     

Subscales within the dependency factor of the Depressive Experiences Questionnaire

Recent theoretical formulations differentiate two types of depressive experiences: one focused on interpersonal issues, such as loss, abandonment, and loneliness; the other focused on issues of self-esteem, such as failure, guilt, and lack of self-worth and autonomy. The Depressive Experiences Questionnaire (DEQ; Blatt, D'Afflitti, & Quinlan, 1976, 1979) assesses these two types of depression. Symptom-based measures of depression (i.e., the Beck Depression Inventory, Beck, Rush, Shaw, & Emery, 1979) have highly significant correlations with the DEQ Self-Criticism factor but only marginally significant correlations with the DEQ Dependency (or interpersonal) factor. Through the use of facet theory and Smallest Space Analysis (Guttman, 1982a), two facets were identified within the DEQ Dependency factor that appear to assess two different levels of interpersonal relatedness. One facet, labelled dependence, includes items expressing feelings of helplessness; fears and apprehensions about separation and rejection; and intense, broad-ranging concerns about possible loss unrelated to a particular relationship. The second facet, labelled relatedness, includes items that consider feelings of loss and loneliness in reaction to disruption of a relationship with a particular person. The dependence facet had significantly higher correlations with measures of depression, whereas the relatedness facet had significantly higher correlations with measures of psychological well-being, especially in women. Thus, the DEQ Dependency factor appears to contain two facets that assess interpersonal relatedness at different developmental levels and correlate differentially with measures of depression and of psychological well-being.     

Effect of Heat Treatment on the Microstructure and Mechanical Properties of Stainless Steel 316L Coatings Produced by Cold Spray for Biomedical Applications

In this study, the effects of heat treatment on the microstructure and mechanical properties of cold sprayed stainless steel 316L coatings using N₂ and He as propellant gases were investigated. Powder and coating characterizations, including coating microhardness, coating porosity, and XRD phase analysis were performed. It was found that heat treatment reduced porosity, improved inter-particle bonding, and increased ductility. XRD results confirmed that no phase transformation occurred during deposition. Significant increase in UTS and ductility was observed for the annealed specimens obtained with nitrogen propellant, whereas little changes were observed for the helium propellant produced specimen.