scholarly journals Reliability and practical aspects of the disease impact measure on hypertensive patients

2013 ◽  
Vol 21 (6) ◽  
pp. 1258-1265 ◽  
Author(s):  
Renata Bigatti Bellizzotti Pavan ◽  
Kátia Melissa Padilha ◽  
Simey de Lima Lopes Rodrigues ◽  
Roberta Cunha Matheus Rodrigues ◽  
Maria Cecília Jayme Bueno Gallani
Keyword(s):  
Internal Consistency ◽  
Temporal Stability ◽  
Emotional Impact ◽  
Disease Symptoms ◽  
Hypertensive Patients ◽  
Social And Emotional ◽  
Disease Impact ◽  
Physical Impact ◽  
The Stability ◽  
The Impact

OBJECTIVE: to evaluate the feasibility, acceptability, the ceiling and floor effects and the reliability of the Instrument to Measure the Impact of Coronary Disease on Patient's Daily Life (IDCV) when applied to hypertensive patients. METHOD: one hundred and thirty seven hypertensive outpatients were interviewed, using questionnaires to collect sociodemographic and clinical data, followed by the IDCV. Reliability was assessed according to the temporal stability and internal consistency criteria. RESULTS: the IDCV was applied in 8.0 (±3.0) minutes with 100% of the items answered. A ceiling effect of 31.4% was observed in the domain Adjustment to the Disease. The stability measure was observed for the total score and for all domains. There was evidence of internal consistency of the total IDCV (α=0.83) and the domains Physical Impact of the Disease - Symptoms (α=0.78) and Social and Emotional Impact of the Disease (α=0.74). CONCLUSION: the IDCV is an instrument of easy use and its reliability among hypertensive patients is evidenced. The domain Adjustment to the Disease, however, should be reviewed in further studies.

On the Reliability of Augmenting/Reducing

2000 ◽  
Vol 14 (4) ◽  
pp. 226-240 ◽  
Author(s):  
André Beauducel ◽  
Stefan Debener ◽  
Burkhard Brocke ◽  
Jürgen Kayser
Keyword(s):  
Evoked Potentials ◽  
Stimulus Intensity ◽  
Internal Consistency ◽  
Auditory Evoked Potentials ◽  
Temporal Stability ◽  
Principal Component ◽  
Intensity Changes ◽  
Stability Of Slope ◽  
Regression Slopes ◽  
The Impact

Abstract To investigate the impact of several methodological variations in the assessment of augmenting/reducing, auditory evoked potentials to 1000 Hz tones with varying stimulus intensity (59, 71, 79, 88, 92, 96 dB (SPL)) were recorded at 19 EEG sites in 24 participants during two separate recording sessions. The internal consistency analysis revealed only weak correlations for linear regression slopes based on high intensity levels when compared to slopes based on low intensity levels. For base-to-peak and peak-to-peak ERP component measurements, acceptable internal consistency and temporal stability were confirmed for the N1/P2-based slope, and partly for the P2 slope, whereas P1, N1, and P1/N1 slopes were not reliable. After submitting auditory evoked potentials to a covariance-based principal component analysis (PCA), followed by unscaled varimax rotation, temporal stability of slope measures for the corresponding factor scores substantially increased. The findings suggest that at least five to six intensity-levels are required over a relatively broad range to yield a reliable measure of auditory evoked augmenting/reducing. If measured reliably, P2 slopes may reflect stimulus intensity changes more precisely than N1/P2 slopes, and should therefore be evaluated in future studies of individual differences in augmenting/reducing.

scholarly journals Development and reliability of an instrument to measure psychosocial determinants of salt consumption among hypertensive patients

2009 ◽  
Vol 17 (5) ◽  
pp. 701-707 ◽  
Author(s):  
Marília Estevam Cornélio ◽  
Maria Cecília Bueno Jayme Gallani ◽  
Gaston Godin ◽  
Roberta Cunha Matheus Rodrigues ◽  
Roberto Dela Rosa Mendes ◽  
...  
Keyword(s):  
Theory Of Planned Behavior ◽  
Internal Consistency ◽  
Interval Analysis ◽  
Content Validity ◽  
Temporal Stability ◽  
Correlation Coefficients ◽  
Validity And Reliability ◽  
Intra Class Correlation ◽  
Hypertensive Patients ◽  
Salt Consumption

This study aimed to present the content validity and reliability analyses of an instrument to study the determinant factors of salt consumption among hypertensive subjects, based on an extension of the Theory of Planned Behavior. Content validity was assessed by 3 experts and a pre-test was carried out with 5 subjects. The final tool, comprising 3 different behaviors related to salt consumption and corresponding psychosocial variables, was applied to 32 subjects for internal consistency and temporal stability (15-day interval) analysis. Cronbach's alpha coefficients > 0.70 and significant intra-class correlation coefficients were observed for most variables, indicating the temporal stability of the measured concepts. The developed instrument exhibited evidence of both content validity and reliability.

scholarly journals Shared ancestry influences community stability by altering competitive interactions: evidence from a laboratory microcosm experiment using freshwater green algae

2013 ◽  
Vol 280 (1768) ◽  
pp. 20131548 ◽  
Author(s):  
Patrick A. Venail ◽  
Markos A. Alexandrou ◽  
Todd H. Oakley ◽  
Bradley J. Cardinale
Keyword(s):  
Related Species ◽  
Temporal Stability ◽  
Biodiversity Loss ◽  
Competitive Interactions ◽  
Ecological Communities ◽  
Freshwater Microalgae ◽  
Community Biomass ◽  
Shared Ancestry ◽  
The Stability ◽  
The Impact

The impact of biodiversity on the stability of ecological communities has been debated among biologists for more than a century. Recently summarized empirical evidence suggests that biodiversity tends to enhance the temporal stability of community-level properties such as biomass; however, the underlying mechanisms driving this relationship remain poorly understood. Here, we report the results of a microcosm study in which we used simplified systems of freshwater microalgae to explore how the phylogenetic relatedness of species influences the temporal stability of community biomass by altering the nature of their competitive interactions. We show that combinations of two species that are more evolutionarily divergent tend to have lower temporal stability of biomass. In part, this is due to negative ‘selection effects’ in which bicultures composed of distantly related species are more likely to contain strong competitors that achieve low biomass. In addition, bicultures of distantly related species had on average weaker competitive interactions, which reduced compensatory dynamics and decreased the stability of community biomass. Our results demonstrate that evolutionary history plays a key role in controlling the mechanisms, which give rise to diversity–stability relationships. As such, patterns of shared ancestry may help us predict the ecosystem-level consequences of biodiversity loss.

scholarly journals Using Generalizability Theory and the ERP Reliability Analysis (ERA) Toolbox for Assessing Test-Retest Reliability of ERP Scores Part 1: Algorithms, Framework, and Implementation

2020 ◽  
Author(s):  
Peter E Clayson ◽  
Kaylie Amanda Carbine ◽  
Scott Baldwin ◽  
Joseph A. Olsen ◽  
Michael J. Larson
Keyword(s):  
Reliability Analysis ◽  
Internal Consistency ◽  
Temporal Stability ◽  
Test Theory ◽  
Theory Approach ◽  
Retest Reliability ◽  
Score Reliability ◽  
Test Retest Reliability ◽  
The Impact ◽  
Reliability Coefficients

The reliability of event-related brain potential (ERP) scores depends on study context and how those scores will be used, and reliability must be routinely evaluated. Many factors can influence ERP score reliability, and generalizability (G) theory provides a multifaceted approach to estimating the internal consistency and temporal stability of scores that is well suited for ERPs. G-theory’s approach possesses a number of advantages over classical test theory that make it ideal for pinpointing sources of error in scores. The current primer outlines the G-theory approach to estimating internal consistency (coefficients of equivalence) and test-retest reliability (coefficients of stability). This approach is used to evaluate the reliability of ERP measurements. The primer outlines how to estimate reliability coefficients that consider the impact of the number of trials, events, occasion, and group. The uses of two different G-theory reliability coefficients (i.e., generalizability and dependability) in ERP research are elaborated, and a dataset from the companion manuscript, which examines N2 amplitudes to Go/NoGo stimuli, is used as an example of the application of these coefficients to ERPs. The developed algorithms are implemented in the ERP Reliability Analysis (ERA) Toolbox, which is open-source software designed for estimating score reliability using G theory. The toolbox facilitates the application of G theory in an effort to simplify the study-by-study evaluation of ERP score reliability. The formulas provided in this primer should enable researchers to pinpoint the sources of measurement error in ERP scores from multiple recording sessions and subsequently plan studies that optimize score reliability.

scholarly journals Temporal stability of stimulus representation increases along rodent visual cortical hierarchies

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Eugenio Piasini ◽  
Liviu Soltuzu ◽  
Paolo Muratore ◽  
Riccardo Caramellino ◽  
Kasper Vinken ◽  
...  
Keyword(s):  
Visual Processing ◽  
Visual Information ◽  
Neural Coding ◽  
Temporal Stability ◽  
Receptive Fields ◽  
Ventral Stream ◽  
Dynamic Stimuli ◽  
The Stability ◽  
Visual Cortical ◽  
The Impact

AbstractCortical representations of brief, static stimuli become more invariant to identity-preserving transformations along the ventral stream. Likewise, increased invariance along the visual hierarchy should imply greater temporal persistence of temporally structured dynamic stimuli, possibly complemented by temporal broadening of neuronal receptive fields. However, such stimuli could engage adaptive and predictive processes, whose impact on neural coding dynamics is unknown. By probing the rat analog of the ventral stream with movies, we uncovered a hierarchy of temporal scales, with deeper areas encoding visual information more persistently. Furthermore, the impact of intrinsic dynamics on the stability of stimulus representations grew gradually along the hierarchy. A database of recordings from mouse showed similar trends, additionally revealing dependencies on the behavioral state. Overall, these findings show that visual representations become progressively more stable along rodent visual processing hierarchies, with an important contribution provided by intrinsic processing.

scholarly journals Intrinsic dynamics enhance temporal stability of stimulus representation along rodent visual cortical hierarchies

2019 ◽  
Author(s):  
Eugenio Piasini ◽  
Liviu Soltuzu ◽  
Paolo Muratore ◽  
Riccardo Caramellino ◽  
Kasper Vinken ◽  
...  
Keyword(s):  
Visual Processing ◽  
Visual Information ◽  
Neural Coding ◽  
Temporal Stability ◽  
Ventral Stream ◽  
Dynamic Stimuli ◽  
The Stability ◽  
Visual Cortical ◽  
Predictive Processes ◽  
The Impact

SummaryAlong the ventral stream, cortical representations of brief, static stimuli become gradually more invariant to identity-preserving transformations. In the presence of long, temporally structured dynamic stimuli, higher invariance should imply temporally persistent representations at the top of this functional hierarchy. However, such stimuli could engage adaptive and predictive processes, whose impact on neural coding dynamics is unknown. By probing the rat analogue of the ventral stream with movies, we uncovered a hierarchy of temporal scales, with deeper areas encoding visual information more persistently. Furthermore, the impact of intrinsic dynamics on the stability of stimulus representations gradually grew along the hierarchy. Analysis of a large dataset of recordings from the mouse visual hierarchy yielded similar trends, revealing also their dependence on the behavioral state of the animal. Overall, these findings show that visual representations become progressively more stable along rodent visual processing hierarchies, with an important contribution provided by intrinsic processing.

scholarly journals Assessing the Influence of Temperature Changes on the Geometric Stability of Smartphone- and Raspberry Pi Cameras

Sensors ◽  
2020 ◽  
Vol 20 (3) ◽  
pp. 643 ◽  
Author(s):  
Melanie Elias ◽  
Anette Eltner ◽  
Frank Liebold ◽  
Hans-Gerd Maas
Keyword(s):  
Low Cost ◽  
Temporal Stability ◽  
Raspberry Pi ◽  
Temperature Changes ◽  
Depth Direction ◽  
3D Data ◽  
Physical Impact ◽  
The One ◽  
The Impact ◽  
Orientation Parameters

Knowledge about the interior and exterior camera orientation parameters is required to establish the relationship between 2D image content and 3D object data. Camera calibration is used to determine the interior orientation parameters, which are valid as long as the camera remains stable. However, information about the temporal stability of low-cost cameras due to the physical impact of temperature changes, such as those in smartphones, is still missing. This study investigates on the one hand the influence of heat dissipating smartphone components at the geometric integrity of implemented cameras and on the other hand the impact of ambient temperature changes at the geometry of uncoupled low-cost cameras considering a Raspberry Pi camera module that is exposed to controlled thermal radiation changes. If these impacts are neglected, transferring image measurements into object space will lead to wrong measurements due to high correlations between temperature and camera’s geometric stability. Monte-Carlo simulation is used to simulate temperature-related variations of the interior orientation parameters to assess the extent of potential errors in the 3D data ranging from a few millimetres up to five centimetres on a target in X- and Y-direction. The target is positioned at a distance of 10 m to the camera and the Z-axis is aligned with camera’s depth direction.

scholarly journals Assessment of the impact of breast cancer on women in Gombe State, Northeastern Nigeria

2019 ◽  
Vol 9 (1) ◽  
pp. 33
Author(s):  
Jonah H. Japhet ◽  
Dathini Hamina ◽  
Doka J. S. Pauline ◽  
Kever R. Teryila ◽  
Habu Haruna ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Social Impact ◽  
Phenomenological Study ◽  
Sampling Technique ◽  
Emotional Impact ◽  
Cost Of Treatment ◽  
Face To Face ◽  
North East ◽  
Physical Impact ◽  
The Impact

Objective: The aim of the study is to assess the physical, financial, emotional and social impact of breast cancer on women in North east Nigeria.Methods: A qualitative transcendental phenomenological study design was adopted, using face-to face unstructured interview to collect data from 22 respondents who were recruited via purposive non-probability sampling technique. The interviews were recorded, transcribed verbatim and further analyzed using thematic analysis method into themes and sub-themes.Results: The result revealed excruciating pains that does not abate completely as the main physical impact, expensive cost of treatment as the major financial impact and crying as the major emotional impact of breast cancer on women. However, been diagnosed with breast cancer had no any consequences on participants’ relationship with spouse or family members.Conclusion: Breast cancer causes pain, makes women to cry and the treatment is very expensive but it does not cause relationship problems. There is therefore the need for Government and Non-governmental policies to be geared towards supporting women with breast cancer to overcome these challenges.

The Stability of Regional Input—Output Multipliers

1977 ◽  
Vol 9 (2) ◽  
pp. 197-214 ◽  
Author(s):  
R S Conway
Keyword(s):  
Impact Analysis ◽  
Temporal Stability ◽  
Washington State ◽  
Input Output ◽  
Minor Problem ◽  
The Stability ◽  
A Minor ◽  
The Impact ◽  
Forecasting Errors ◽  
Over Time

Changes in regional input—output structures are studied by analyzing the temporal stability of income and output multipliers derived from the Washington State input—output tables for 1963, 1967, and 1972. One conclusion is that for impact analysis, as it is most commonly practiced, the instability of multipliers over time appears to be a minor problem. This judgment is based upon a comparison of forecasting errors in impact studies due to temporal changes in multipliers with forecasting errors arising from other aspects of the impact estimating procedure. The implication is that regional analysts should reassess the commonly felt need to update tables on a regular basis.

Internal Structure of the Spanish Adaptation of the Eating Disorder Inventory-3

2012 ◽  
Vol 28 (1) ◽  
pp. 25-31 ◽  
Author(s):  
Paula Elosua ◽  
Alicia López-Jáuregui
Keyword(s):  
Eating Disorders ◽  
Eating Disorder ◽  
Internal Structure ◽  
Internal Consistency ◽  
Clinical Sample ◽  
Temporal Stability ◽  
Second Order ◽  
Order Structure ◽  
Eating Disorder Inventory ◽  
High Internal Consistency

In this study the Eating Disorder Inventory-3 was adapted to Spanish and analyzed the internal psychometric properties of the test in a clinical sample of females with eating disorders. The results showed a high internal consistency of the scores as well as high temporal stability. The factor structure of the scale composites was analyzed using confirmatory factor analysis. The results supported the existence of a second-order structure beyond the psychological composites. The second-order factor showed high correlation with the factor related to eating disorders. Overall, the Spanish version of the EDI-3 showed good psychometric qualities in terms of internal consistency, temporal stability and internal structure.

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