69 research outputs found
Clock drawing performance in cognitively normal elderly
The Clock Drawing Test (CDT) is a common neuropsychological measure sensitive to cognitive changes and functional skills (e.g., driving test performance) among older adults. However, normative data have not been adequately developed. We report the distribution of CDT scores using three common scoring systems [Mendez, M. F., Ala, T., & Underwood, K. L. (1992). Development of scoring criteria for the Clock Drawing Task in Alzheimer's Disease. Journal of the American Geriatrics Society, 40, 1095-1099; Cahn, D. A., Salmon, D. P., Monsch, A. U., Butters, N., Wiederholt, W. C., & Corey-Bloom, J. (1996). Screening for dementia of the Alzheimer type in the community: The utility of the Clock Drawing Test. Archives of Clinical Neuropsychology, 11(6), 529-539], among 207 cognitively normal elderly. The systems were well correlated, took little time to use, and had high inter-rater reliability. We found statistically significant differences in CDT scores based on age and WRAT-3 Reading score, a marker of education quality. We present means, standard deviations, and t- and z-scores based on these subgroups. We found that "normal" CDT performance includes a wider distribution of scores than previously reported. Our results may serve as useful comparisons for clinicians wishing to know whether their patients perform in the general range of cognitively normal elderly. © 2007 National Academy of Neuropsychology
Holes in the t-J_z model: a thorough study
The t-J_z model is the strongly anisotropic limit of the t-J model which
captures some general properties of the doped antiferromagnets (AF). The
absence of spin fluctuations simplifies the analytical treatment of hole motion
in an AF background and allows us to calculate the single- and two-hole spectra
with high accuracy using regular diagram technique combined with real-space
approach. At the same time, numerical studies of this model via exact
diagonalization (ED) on small clusters show negligible finite size effects for
a number of quantities, thus allowing a direct comparison between analytical
and numerical results. Both approaches demonstrate that the holes have tendency
to pair in the p- and d-wave channels at realistic values of t/J. The
interactions leading to pairing and effects selecting p and d waves are
thoroughly investigated. The role of transverse spin fluctuations is considered
using perturbation theory. Based on the results of the present study, we
discuss the pairing problem in the realistic t-J-like model. Possible
implications for preformed pairs formation and phase separation are drawn.Comment: 21 pages, 15 figure
Intersex, infertility and the future: early diagnoses and the imagined life course
This is the author accepted manuscript. The final version is available from Wiley via the DOI in this recordInfertility is often recognised as a status that is medically identified in adulthood after unsuccessful
attempts to conceive. This paper develops existing literature by illustrating how current
conceptualisations of infertility do not incorporate a full range of experiences. Drawing on detailed,
reflective diaries and in-depth interviews with five participants, I explore how infertility is experienced
and understood by women with variations of sex characteristics (VSCs) or intersex traits. I argue that
greater consideration needs to be applied to intersex people and the circumstances of an infertility
status that may be received in infancy, childhood or adolescence, before or outside of attempts to
conceive, and without undergoing fertility treatment.
Through discussions of time and futurity, this paper seeks to explore how visions of the future
coalesce with an infertile status that is received in combination with an atypical sex status early in life.
The paper indicates that early infertility can hinder some intersex children and young people’s
ambitions. However, infertility is not understood to be pathological or consistently prohibitive
throughout the lives of everyone affected. Intersex women's conceptions of a potentially childless
future are varied, complex, ambivalent, and in some cases transitional throughout the life courseEconomic and Social Research Council (ESRC
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