Search results for "respondents"

showing 5 items of 5 documents

Attrition and Use of Proxy Respondents and Auxiliary Information in the Sicilian Neuroepidemiologic Study

1994

Two-phase prevalence surveys with screening (phase 1) and examination (phase 2) are useful for some chronic diseases. Attrition, which may bias estimates, occurs in either phase because some eligible subjects die before contact, some refuse to cooperate, some are incapacitated, and some are unreachable. This investigation relates to a survey of neurologic diseases conducted in three municipalities of Sicily (prevalence date, November 1, 1987) and considers the attrition experienced and the use of proxy respondents in phase 1 and auxiliary information in phase 2 to offset, in part, this attrition. Regarding case finding, the salvage effort was more productive for decreased and incapacitated …

AdultMaleProxy respondentsmedicine.medical_specialtyAdolescentEpidemiologybusiness.industryData CollectionPublic healthMiddle Agedmedicine.diseaseProxy (climate)Impaired consciousnessChronic diseaseItalyEpidemiologymedicineHumansCase findingFemaleAttritionNervous System DiseasesEpidemiologic MethodsbusinessDemographyAmerican Journal of Epidemiology
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The Effectiveness of Vitamin E Treatment in Alzheimer’s Disease

2019

Vitamin E was proposed as treatment for Alzheimer’s disease many years ago. However, the effectiveness of the drug is not clear. Vitamin E is an antioxidant and neuroprotector and it has anti-inflammatory and hypocholesterolemic properties, driving to its importance for brain health. Moreover, the levels of vitamin E in Alzheimer’s disease patients are lower than in non-demented controls. Thus, vitamin E could be a good candidate to have beneficial effects against Alzheimer’s. However, evidence is consistent with a limited effectiveness of vitamin E in slowing progression of dementia; the information is mixed and inconclusive. The question is why does vitamin E fail to tre…

Drugbrain healthAntioxidantmedicine.medical_treatmentmedia_common.quotation_subjectReviewDiseaseBioinformaticsCatalysislcsh:ChemistryInorganic ChemistryAlzheimer DiseasemedicineHumansVitamin EDementiaPhysical and Theoretical Chemistrylcsh:QH301-705.5Molecular BiologyBeneficial effectsSpectroscopymedia_commonClinical Trials as Topicnon-respondentsbusiness.industryVitamin EOrganic ChemistryCognitionGeneral Medicinemedicine.diseaseComputer Science ApplicationsOxidative StressTreatment Outcomeantioxidantslcsh:Biology (General)lcsh:QD1-999respondents to vitamin ECognition DisordersbusinessAlzheimer’s diseaseInternational Journal of Molecular Sciences
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Design and analysis of discrete choice experiments for models with response time

2013

Settore SECS-S/02 - Statistica Per La Ricerca Sperimentale E TecnologicaA sector of conjoint analysis (experimental design in marketing research) is made of the so called choice experiments. In choice experiments respondents undergo a questionnaire which is nowadays mostly submitted through the internet. The questionnaire proposes to the respondent a sequence of choice sets each one including two or more profiles being a profile a specific combination of attribute levels. The respondent selects the preferred profile for each choice set. Responses given by a sample of respondents are analysed through suitable methods aimed to eventually find the best combination of attribute levels. One method of analysis adopts the Multinomial Logit (MLN) model. In this article the authors show the results of the MLN analysis compared with another model of analysis which uses an additional response which can be easily recorded by electronically submitted questionnaires. In practice modern survey platforms like “Qualtrics” (the one used for this work) can record the so called “response latency” i.e. the time taken by the respondent to make the choice and select the most preferred profile in the choice set. Thanks to a response latency model further refined in this work it is possible to deduce the relative weight of importance of the profiles for each choice set and respondent. This type of response can be used in place of the dichotomous choice variable in the MLN model. The two models and methods of analysis are deeply compared and it is critically discussed when it is better to use one or the other method. As a result a more reliable estimate of the optimal profile comes up implying lower risks for new investments and marketing decisions.
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Employee Recruitment: Identifying Response Distortion on the Personality Measure

2015

The aim of this study was to identify individuals who fake their response on personality assessments in the context of employee recruitment. In the study experiment, participants were randomly divided into two groups. The first group was instructed to complete a measure (BFI-44) honestly while the second group was instructed to complete the inventory as if they were job applicants participating in an employee recruitment. It was hoped that the second group would be induced to give fake responses. Cluster analysis and latent class analysis for a two-class constrained model was applied to and fitted to the data. The correlation between actual group (honest vs. faking) and predicted group obta…

faking responsesapplicants-respondentscluster/class membership
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17. gadsimtā Rīgā iespiesto latīņu akadēmisko tekstu raksturiezīmes

2018

okazionālā dzejadisputationsoponents:HUMANITIES and RELIGION [Research Subject Categories]respondentsdisputioccasional poetryrespondensopponenspraesesmoderatorsacademic textsakadēmiski teksti
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