"Psychologist supply, managed care, and the effects of income: Fault lines beneath California psychologists": Erratum.

Reports errors in the original article by D. Pingitore et al (Professional Psychology: Research and Practice, 2001, Vol 32[6], 597-606). In the first paragraph on page 601, lines 5-10 should read: "Net income for psychologists aged 40-54 years was significantly greater than for psychologists 39 years and younger (pt test for income differences by age group should be pp>.05). (The following abstract of this article originally appeared in record 2001-05464-006.) Data from the 2000 California Survey of Psychological Practice (D. Pingitore, R. Scheffler, M. Haley, T. Sentell, & D. Schwalm, 2001) were used to measure psychologists' income variation associated with demographic characteristics, managed care participation rate, and mental health workforce supply concentrations. A 10% increase in the supply of psychologists in a psychologists' market of practice resulted in a $1,749 reduction in income compared with a $1,330 income reduction due to a 10% increase in managed care participation... (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Perceptual maps of supermarket locations.

Used multidimensional scaling algorithms to develop perceptual configurations of supermarket locations for 55 consumers. Individual and aggregate perceptual configurations were contrasted to an actual map of supermarket locations, and differences between configurations under 2 multidimensional scaling algorithms were described. Actual and perceived distances to each of the supermarkets were correlated with the frequency of shopping at the respective stores for each consumer. Results indicate that perceptual distances had a more significant relationship to shopping frequency than actual distances. (23 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Retention mechanisms in reversed-phase liquid chromatography. Stationary-phase bonding density and partitioning

The partitioning model of retention for reversed-phase liquid chromatography, described by mean-field statistical thermodynamic theory, asserts that one principal driving force for solute retention is the creation of a solute-sized cavity in the stationary phase. Beyond a critical stationary phase bonding density, increased grafted chain density should result in enhanced chain ordering, which will increase the energy necessary for solute cavity formation and result in decreased chromatographic partition coefficients. We have evaluated chromatographic partition coefficients over an octadecyl bonding density range of 1.6-4.1 mumol/m2 and have found a maximum in partition coefficient at approximately 3.1 mumol/m2. Retention, however, approximately plateaus due to compensating changes in the partition coefficient and stationary phase volume. This provides unequivocal evidence that partitioning is the dominant form of retention for small nonpolar solutes.     

Psychologist supply, managed care, and the effects of income: Fault lines beneath California psychologists.

Data from the 2000 Calffornia Survey of Psychological Practice (D. Pingitore, R. Scheffler, M. Haley, T. Sentell, & D. Schwalm, 2001) were used to measure psychologists' income variation associated with demographic characteristics, managed care participation rate, and mental health workforce supply concentrations. A 10% increase in the supply of psychologists in a psychologists' market of practice resulted in a $1,749 reduction in income compared with a $1,330 income reduction due to a 10% increase in managed care participation. The authors discuss how psychologists' income and other aspects of practice are shaped by market dynamics, trends in the psychologist workforce, and public policy. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Gender differences in practice patterns and income among psychologists in professional practice.

Income, an important facet of professional psychological practice, differs by gender. The potential sources of income differences among California clinical psychologists were investigated. Full-time female psychologists earned significantly less income on average than full-time male psychologists, despite similar patient demographics, caseloads, practice profiles, and payment sources. In separate regression models, professional experience increased income more for men than for women, whereas greater psychologist supply decreased income for both groups. According to the regression model, if female psychologists were paid like male psychologists, they would receive, on average, $16,440 more per year. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Deuterium nuclear magnetic resonance spectroscopy as a probe for reversed-phase liquid chromatographic bonded-phase solvation. 3. Tetrahydrofuran and water binary systems

Deuterium nuclear magnetic resonance ((2)H NMR) spectroscopy is a useful tool in probing molecular association between components in a binary hydro-organic mixture, such as tetrahydrofuran (THF) and water. Measurements of (2)H longitudinal relaxation times (T(1)) for deuterated analogs of THF and water provide this type of information, since the magnitude of T(1) is indicative of molecular association and mobility. This technique is also useful in determining the interactions between the mobile phase and reversed-phase stationary phase. T(1) measurements of slurry samples, consisting of both mobile- and stationary-phase components, allow for changes in the longitudinal relaxation time of mobile-phase components upon contact with the stationary phase (ΔT(1)) to be monitored. These ΔT(1) values are indicative of the degree of association of the THF-water mobile-phase components with the stationary phase.     

Professional psychology in a new era: Practice-based evidence from California.

The California Survey of Psychological Practice provides comprehensive data on patient case mix, treatments, practice settings, and payment sources using a representative sample of psychologists. These psychologists practice in diverse settings and continue to deliver traditional psychotherapies. California psychologists' treatment of persons with private insurance highlights the profession's public health contribution by improving the functioning of employed persons and their families. Despite high managed care enrollment among Californians, these psychologists demonstrate wide variability in managed care participation. The authors compare the findings to prior surveys among psychologists and discuss the findings in relation to trends in psychological practice and public policy. (PsycINFO Database Record (c) 2010 APA, all rights reserved)