Drinking to regulate positive and negative emotions: A motivational model of alcohol use.

The present study proposed and tested a motivational model of alcohol use in which people are hypothesized to use alcohol to regulate both positive and negative emotions. Two central premises underpin this model: (a) that enhancement and coping motives for alcohol use are proximal determinants of alcohol use and abuse through which the influence of expectancies, emotions, and other individual differences are mediated and (b) that enhancement and coping motives represent phenomenologically distinct behaviors having both unique antecedents and consequences. This model was tested in 2 random samples (1 of adults, 1 of adolescents) using a combination of moderated regression and path analysis corrected for measurement error. Results revealed strong support for the hypothesized model in both samples and indicate the importance of distinguishing psychological motives for alcohol use. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

An observer-based psychoacoustic procedure for use with young infants.

This article describes an observer-based technique for assessing auditory capacities of infants from 3 to 12 months of age. This technique, referred to as the Observer-based Psychoacoustic Procedure (OPP), combines features of the Forced-choice Preferential Looking technique developed by Teller (1979) and of Visual Reinforcement Audiometry (Moore, Thompson, & Thompson, 1975). The rationale behind the procedure and the specific techniques used in its application are detailed here. Psychometric functions and thresholds for pure-tone detection and frequency discrimination obtained with OPP are also presented. The results for 6-month-olds are compared with results from previous studies employing a visually reinforced head-turn procedure. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Positioning and animating human figures in a task-oriented environment

TEMPUS is an interactive graphics system which enables a user to model the task-oriented activities of several human agents in a three-dimensional environment. The user can create one or more human figures which are correctly scaled according to a specific population, or which meet certain size constraints. These figures may be viewed in any of several graphical modes.     

How demonstrated comprehension can get muddled in production.

The discourse skills of 31 low-income and 30 middle-income kindergarten children (mean ages 5 yrs 2 mo and 5 yrs 4 mo) from the same classrooms were examined in 2 experiments. In each experiment a nonverbal demonstration of comprehension of the discourse material was assured before Ss were asked to express that same material verbally to another child. In Exp I, Ss were read stories that they acted out with props. When comprehension was assured they were asked to paraphrase the story to another. In Exp II, Ss were either shown or instructed verbally how to open an attractive box. When comprehension was assured they were asked to teach the "trick" to a blindfolded adult. Results from both experiments indicate that although it took the low-income Ss somewhat longer to comprehend the information, the greatest difference between the groups was in the ability to communicate information that they already knew. Low-income Ss produced less relevant information on both tasks, although this did not appear to be related to linguistic complexity or sheer output. (26 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Metaphor in psychodynamic psychotherapy with borderline and non-borderline clients: A qualitative analysis.

Conducted an intensive, qualitative analysis of borderline and non-borderline client's and therapist's experiences of metaphoric expression in a single psychotherapy session. Open-ended interviews were conducted with 2 therapists and 4 clients (aged 24–38 yrs; 2 borderline and 2 non-borderline) who were actively engaged in psychoanalytically-oriented, long-term psychotherapy. The intensive analyses of inquiry interview transcipts revealed 3 important categories of metaphor functions that were shared by all 4 psychotherapy dyads: (1) metaphors illuminate clinical issues, (2) metaphor functions to depict clients' self and object relationships, and (3) therapist metaphor stimulates an intensification of client experiential engagement in therapy. Patterns differentiating the borderline and non-borderline dyads in relation to metaphor use were discussed in the context of 2 core categories: the Representation Mode of Interaction and the Literal Mode of Interaction. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Perceived social support, self-efficacy, and adjustment to abortion.

Prior to their having a 1st trimester abortion, women's perceptions of social support from their partner, family, and friends and self-efficacy for coping were assessed. Depression, mood, physical complaints, and anticipation of negative consequences were measured after the 30-min recovery period. As predicted, perceived social support enhanced adjustment indirectly through its effects on self-efficacy. Women who perceived high support from their family, friends, and partners had higher self-efficacy for coping. Higher self-efficacy, in turn, predicted better adjustment on the psychological measures but not on the physical complaint measure. No direct path between social support and adjustment was observed. In addition, women who told close others of their abortion but perceived them as less than completely supportive had poorer postabortion psychological adjustment than either women who did not tell or women who told and perceived complete support. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

High-temperature stabilities of low-linolenate,high-stearate and common soybean oils

Four soybean oils (SBO) with different fatty acid (FA) compositions were tested for stability during intermittent heating and frying of bread cubes. None of the oils was hydrogenated or contained any additives. Two of the oils were from common commercial varieties. The other two oils were from seed developed in a mutation breeding program and included the line A5, which contained 3.5% linolenate, and the line A6, which contained 20% stearate. Each oil (450 g) was heated to 185 C in a minifryer. Bread cubes were fried at the beginning of heating, and half were stored at −10 C to preserve freshness. The second half was stored at 60 C for 14 days. Heating was continued for 10 hr/day for four days. After 40 hr of heating, an additional 30 g of bread cubes were fried. According to sensory evaluations of the fried bread cubes, peroxide values of oil extracted from the cubes and conjugated diene values of the oils, the A5 and A6 oils were more stable than those from the commercial varieties. Small differences occurred in the flavor and oxidative stability of the cubes fried after 40 hr of heating the oils. Large differences between A5 and A6 and the commercial varieties occurred after storage of bread cubes for 14 days.     

The role of sulfate as a competitive inhibitor of enzymatically‐mediated heavy metal uptake by Citrobacter sp: implications in the bioremediation of acid mine drainage water using biogenic phosphate precipitant

Heavy metals can be removed from solution via biocrystallization with enzymatically‐liberated inorganic phosphate, according to Michaelis–Menten kinetics, in free whole cells and cells immobilized within polyacrylamide gel in a flow‐through reactor. Sulfate is a competitive inhibitor of phosphate release and a predictive model was developed and shown to describe the effect of sulfate on the efficiency of phosphate release by flow‐through columns. The inhibitory effect was substantially less than anticipated in the case of metal removal by the columns. In the case of lanthanum removal metal removal efficiency was restored by increasing the substrate concentration in accordance with model predictions. In the case of uranyl ion its removal with an equivalent substrate supplement increased the activity by 20% over the initial value at a limiting flow rate. Since the initial loss in activity in the presence of 40 mmol dm⁻³ SO₄²⁻ (approximately twice the K_i value) was only approximately 20% with both metals this was considered to be a minor problem for bioprocess application. In confirmation, calculations made from a published ‘case history’ of application of the system to the bioremediation of acid mine drainage water (AMD) containing 0.22 mmol dm⁻³ of uranyl ion and 35 mmol dm⁻³ of SO showed that the benchscale model is a good representation of performance under actual load conditions. © 1999 Society of Chemical Industry