Category learning and change: Differences in sensitivity to information that enhances or reduces intercategory distinctions.

We examined the amenability of abstractions of categories to new and relevant information. In Experiment 1, Ss formed impressions of 2 sets of numbers by periodically estimating the cumulative means of each set. During the 1st half of the procedure, the 2 means were mathematically stable. During the 2nd half of the procedure, the mean of 1 set was modified and the mean of the other set remained unchanged. We predicted and found that the resultant estimates for the modified category changed more when the mean difference between the 2 categories was enhanced than when it was reduced. Experiment 2 suggested that the accentuation effect results from a 2-stage process of category learning (Stage 1) and category change (Stage 2). Experiment 3 replicated the effect with person categories. The relevance of category accentuation is discussed with respect to the modifiability of social beliefs. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Introduction to special issue: Rehabilitation psychology and persons with psychiatric disabilities: Are they mutually exclusive?

This guest-edited issue of the journal illustrates the relevance of psychiatric rehabilitation to rehabilitation psychologists. It demonstrates that the focus of psychiatric rehabilitation includes some areas of functioning typically identified with rehabilitation psychologists, for example, vocational, residential, and family functioning. Further, it shows that traditional assessment methodologies and treatment settings are beginning to reflect a psychiatric rehabilitation orientation. Finally, it illustrates the philosophy and treatment models that form the basis of physical rehabilitation as also underlying psychiatric rehabilitation. It is hoped that this issue of Rehabilitation Psychology will assist in the resolution of the debate over contextual issues by considering why psychologists working with psychiatrically impaired persons may be identified as rehabilitation psychologists. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Recovery of 3-D structure from motion is neither euclidean nor affine.

The relationship between simulated and judged depth separations for pairs of probe dots on planar surface patches was examined in a series of 6 experiments. The simulated slant of the patches was varied without varying the simulated depth separation of the probe dots by varying the depth gradient orthogonal to the direction determined by the probe dots on the image plane. Judged depth separation varied with mean slant for constant simulated depth separations. When observers judged depth separations along a closed path, the integral of the signed depths did not sum to zero, as would be required in Euclidean geometry. These results are inconsistent with the view that the mapping between simulated and perceived 3-D structure is affine and indicate that, in general, the perceived structure cannot be represented in either a Euclidean space or an affine space. Moreover, these results are consistent with a first-order temporal analysis of the optic flow. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Rehabilitation psychologists in medical settings: A unique subspecialty or a redundant one?

A critique of the literature addressing functions of rehabilitation psychologists in medical settings was accomplished in order to determine the range of roles typically assumed by them. Although this search yielded relatively few citations that clearly outlined duties and functions commonly undertaken by them, it did provide evidence that many use a behavioral framework and that their incorporation of new technologies, such as biofeedback, has helped to mainstream them into medical practice. In addition, the current emphasis placed on cost containment suggests that many of the treatment modalities practiced by rehabilitation psychologists will be increasingly used in medical settings. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Epoxyeicosatrienoic acid metabolism in arterial smooth muscle cells

Epoxyeicosatrienoic acids (EETs) are eicosanoids synthesized from arachidonic acid by the cytochrome P450 eposygenase pathway. The present studies demonstrate that 8,9-, 11,12-, and 14,15-EET are rapidly taken up by porcine aortic smooth muscle cells. About half of the uptake is incorporated into phospholipids, and saponification indicates that most of this remains in the form of EET. The EETs also are converted to the corresponding dihydroxyeicosatrienoic acids (DHETs) and during prolonged incubations, additional metabolites that do not retain the EET carboxyl group are formed. Most of these products are released into the medium. However, some DHET and metabolites less polar than EET are incorporated into the phospholipids, and a small amount of unesterified EET is also present in the cells. The incorporation of 14,15-EET and its conversion to DHET did not approach saturation until the concentration exceeded 10-20 microM, indicating that vascular smooth muscle has a large capacity to utilize this EET. These findings suggest that certain vasoactive effects of EETs may be due to their incorporation by smooth muscle cells. Furthermore, through conversion to DHET and other oxidized metabolites, smooth muscle apparently has the capacity to inactivate EETs that are either formed in or penetrate into the vascular wall.     

Non-traditional mothers: single heterosexual/lesbian women and lesbian couples electing motherhood via donor insemination

The conformational properties of alpha,alpha-dialkylated amino acid residues possessing acyclic (diethylglycine, Deg; di-n-propylglycine, Dpg; di-n-butylglycine, Dbg) and cyclic (1-aminocycloalkane-1-carboxylic acid, Acnc) side chains have been compared in solution. The five peptides studied by nmr and CD spectroscopy are Boc-Ala-Xxx-Ala-OMe, where Xxx = Deg (I), Dpg (II), Dbg (III), Ac6c (IV), and Ac7c (V). Delineation of solvent-shielded NH groups have been achieved by solvent and temperature dependence of NH chemical shifts in CDCl3 and (CD3)2SO and by paramagnetic radical induced line broadening in peptide III. In the Dxg peptides the order of solvent exposure of NH groups is Ala(1) > Ala(3) > Dxg(2), whereas in the Acnc peptides the order of solvent exposure of NH groups is Ala(1) > Acnc(2) > Ala(3). The nmr results suggest that Acnc peptides adopt folded beta-turn conformations with Ala(1) and Acnc(2) occupying i + 1 and i + 2 positions. In contrast, the Dxg peptides favor extended C5 conformations. The conformational differences in the two series are clearly borne out in CD studies. The solution conformations of peptides I-III are distinctly different from the beta-turn structure observed in crystals. Low temperature nmr spectra recorded immediately after dissolution of crystals of peptide II provide evidence for a structural transition. Introduction of an additional hydrogen-bonding function in Boc-Ala-Dpg-Ala-NHMe (VI) results in a stabilization of a consecutive beta-turn or incipient 3(10)-helix in solution.     

Length of incubation time for human immunodeficiency virus cultures

Qualitative human immunodeficiency virus culture is a slow, labor-intensive, and expensive procedure, yet critical for the diagnosis of infants born to human immunodeficiency virus-seropositive mothers. We report that the cultures can be terminated at day 21 with minimal false-negative results but with considerable savings in both time and money.     

Decision criteria for predicting adherence for psychiatric emergency room patients with referral appointments

This paper describes and evaluates a method of predicting referral appointment-keeping behavior for psychiatric emergency room patients. Studies have shown that referral systems which provide appointments and reminders achieve higher appointment adherence. However, studies have not been conducted of those experiencing a good referral system to predict adherence behavior and indicate further areas for improvement.Discriminant analysis is applied to patient's psychiatric signs and symptoms for selecting variables that predict referral appointment keeping behavior. All patients seen during a 6 week period were selected from a 1,000 bed hospital's Psychiatric Emergency Room. The data were collected during the patient's visit to the psychiatric emergency room and prior to aftercare treatment. The subset of non-psychotic patients requiring outpatient psychiatric care was the focus of this analysis. The model indicates that patient's adherence with referral appointment can be predicted with 76% accuracy using the best three discriminating variables. This prediction per cent increases to 97% with all contributing variables. The non-adherers are identified with 66% and 100% accuracy, respectively. Distressingly, “Suicidal Behavior” and “Potentially Harming Others” relates to non-adherence. If the non-compliant emergency patient, especially those dangerous to themselves and others, can be identified in advance, the care systems can be changed to increase the number of patients following referral recommendations. This reduces both initial treatment cost and avoids cost resulting from more severe illnesses arising for lack of initial treatment.     

Subtyping versus subgrouping processes in stereotype representation.

Participants were instructed to organize information about group members either by distinguishing stereotype-consistent from stereotype-inconsistent individuals (subtyping instructions), by dividing the individuals into multiple groups on the basis of similarities and differences (subgrouping instructions), or with no explicit organizing instructions. Participants given the subtyping instructions showed greater perceived stereotypicality and homogeneity and perceived a greater difference in how typical the confirming versus disconfirming group members were, relative to subgroup participants. Study 2 demonstrated natural variation among participants in the perceived atypicality of the disconfirming relative to confirming individuals when learning about a gay activist group. Atypicality predicted perceptions of this group, even when prejudice and strength of stereotyping toward gays as a whole were statistically controlled. (PsycINFO Database Record (c) 2010 APA, all rights reserved)