7 research outputs found
A computer-based auditory and visual sequential pattern test for school-aged children
Auditory processing refers to the efficiency and effectiveness by which the CNS utilises
auditory information (ASHA, 2005). Auditory processing disorder (APD) is a processing
dysfunction characterised by severe listening difficulties, despite normal peripheral hearing
sensitivity. It affects approximately 3â5% of school aged children (Musiek & Chermak, 2007).
An important step towards effective identification and treatment of these children is to
develop improved methods of assessing listening skills and differentially diagnosing APD. A
test that is commonly used internationally as part of a standard APD assessment is the
Frequency Pattern Test (FPT). The FPT specifically targets temporal processing abilities
related to the recall of a sequential pattern of a series of auditory stimuli. However,
interpretation of this test is complicated by the multiple listening and cognitive skills
involved, and by factors that may negatively affect test performance such as fatigue,
motivation and attention. These factors are particularly relevant when testing children.
In order to establish APD as an auditory specific deficit rather than the auditory
manifestation of a more global amodal or multimodal processing or cognitive deficit, some
researchers (Cacace & McFarland, 2005) propose the incorporation of multimodal testing
into standard clinical APD assessments. It has been suggested that comparisons on
analogous auditory and visual tasks, for example, may hold implications for the differential
diagnosis of processing deficits involving the central nervous system. However, there is a
paucity of evidence regarding the clinical utility of visual analogs of central auditory tests in
the differential diagnosis of central auditory processing deficits.
We have developed a new computerâbased auditory and visual sequential patterns test, the
Bird Song Game, which uses engaging computer animations and an interactive touchscreen
interface, and have collected data from typically developing schoolâaged children and
children with APD.
A total of 128 children aged 6â10 years were recruited from two independent mainstream
schools of differing decile rating; and a further 11 children with previously identified APD
also participated. Analysis of results included comparisons between age, gender, left and
right ears and schools. Further analysis compared results between the manual and verbal
mode of reporting responses, as well as between the visual and auditory modalities.
Results demonstrate that scores attained by typically developing children on the Bird Song
Game were similar to current normative scores on the traditional FPT. This indicates that the
computer based version of the test is a good clinical substitute, and that the current
normative values may be used in interpreting performance on the Bird Song Game in a
clinical setting. There was a significant difference in performance on sequencing tasks in the
auditory and visual modalities for both groups of children (threeâway ANOVA, p < 0.001).
There was no significant difference in performance between the two reporting modes
(manual and verbal) for either group (twoâway ANOVA, p < 0.05). A significant difference in
performance was found between the low and high decile school (p < 0.001) and an effect of
musical education was seen in some groups
These findings provide evidence that a computer based interactive test offers an alternative
procedure, and has several advantages over its CD based counterpart
Dephosphorylation of the catenins p120 and p100 in endothelial cells in response to inflammatory stimuli
Vascular endothelial growth factor stimulates dephosphorylation of the catenins p120 and p100 in endothelial cells
A Porous Azatruxene Covalent Organic Framework as Positive Electrode Materials in Li- and Mg-based Batteries
Covalent-organic frameworks (COFs) containing well-defined redox-active groups have become competitive materials for next-generation batteries. Although a high rate performance can be expected, only few examples of p-type COFs have been reported for charge storage to date, with even fewer examples showing the use of COFs in multivalent ion batteries. Herein, we report the synthesis of an azatruxene-based COF and its application as positive electrode material in Li- and Mg-based batteries. Through solvothermal condensation a highly porous and crystalline COF was obtained, as confirmed by N2 adsorption and powder X-ray diffraction (PXRD). The electron-rich azatruxene monomer shows up to three reversible one-electron oxidations making it an attractive material for anion storage. When this material is utilized in Li-based cells as a COF/CNT electrode, an average discharge potential of 3.9 V is obtained with discharge capacities of up to 70 mA h gâ1 at a 2C rate. In Mg batteries using a tetrakis(hexafluoroisopropyloxy) borate electrolyte cycling proceeds with an average discharge voltage of 2.9 V. Even at a fast current rate of 5C, the capacity retention amounts to 84% over 1000 cycles, and the cells deliver an energy density of 112 W h kgâ1