Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 61 for “"non-response"”.
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Understanding Psychosocial Treatment Non-Response in Children with Functional Abdominal Pain
… to clarify what factors predicted treatment non-response, how and for whom treatments worked, and why some children’s pain worsened. Participants were randomized to undergo one of two 10-week interventions—either caregiver education or a novel, acceptance- and interoceptive exposure-based …
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Antikörper vermittelte sekundäre Non-Response in der Behandlung spastischer Bewegungsstörungen im Kindesalter mit Botulinum Toxin A
… guter Wirksamkeit wurde als sekundäre Non-Response definiert. Die Datenerfassung erfolgte retrospektiv und erfasste einen Zeitraum von Mai 1993 bis April 2001. <br>Bei 35 von 110 Patienten (31,8%) wurden hohe Titer neutralisierender ABA nachgewiesen. Eine sekundäre Non-Response lag bei …
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Comparison of three survey methods applied to the recreational rock lobster fishery of Western Australia.
… Australia. Mail surveys are susceptible to non-response and recall bias. The key to determining useful estimates of fishing catch and effort is to minimise both biases. Telephone recall surveys, with high response rates, effectively eliminate nonresponse bias. However, they still suffer from …
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Improving applicability of the non-monotone unified estimate for missing data
… causes a loss of statistical power and can cause non-response bias. Inverse probability weighting is one method used to avoid non-response bias. However, when some individuals have partially observed data inverse probability weighting has only a limited ability to use this data. The unified …
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Acceptability of Antiretroviral Drugs among adults living in Chawama, Lusaka
… and 46.9% males participated in the study. The non response rate was less than 1%. Overall (n=409), 52.8% females and 46.9% males participated in this study. The non response rate was less than 1%. A high level of willingness was observed with more than 50% of participants willing to take ARVs …
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Acceptability of Antiretroviral Drugs among adults living in Chawama, Lusaka
… and 46.9% males participated in the study. The non response rate was less than 1%. Overall (n=409), 52.8% females and 46.9% males participated in this study. The non response rate was less than 1%. A high level of willingness was observed with more than 50% of participants willing to take ARVs …
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Methods for analysing complex panel data using multilevel models with an application to the Brazilian labour force survey
… panel design, which is a source of planned non-response. Unplanned non-response is also present in panel data in the form of panel attrition and intermittent nonresponse.<br/><br/>Methods are developed to handle this type of data complexity. These methods follow the Multilevel Model …
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Investigating trial types putatively evidencing semantic conflict in the Stroop task
… stages of processing, including the semantic and response stages. Different experimental methods have been used in an attempt to dissociate the cognitive processes involved in these stages. The work presented in this thesis evaluates two such methods that have been popular, namely the use of a …
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The effects of monetary and non-monetary incentives on respondent attrition in longitudinal survey
… longitudinal survey due to verbal drop-outs and non-response. Attrition can render datasets useless due to incomplete entries, making it one of the most significant weaknesses of longitudinal surveys. In order to explore the effects of incentives on attrition, this research project studies the …
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Measuring Wages and Inequality in South Africa Using Two Nationally Representative Data Series
… NIDS data can be adjusted to account for item non-response using a bracket reweighting technique and the effects thereof. Secondly, I consider how estimates of the wage distribution differ between NIDS and PALMS when using the most comparable estimation methods available. Finally, I discuss …
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Genomic profiling of response to $\textit{in vivo}$ immune perturbations
… to profile, predict, and understand immune response to perturbation. The ability to measure immune gene expression at scale has led to the identification of transcriptomic signatures that predict clinical phenotypes such as antibody response to vaccines. It has also been recognised that both …
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Multidimensional and Persistent Poverty: Methodological Approaches to Measurement Issues
… poverty measures in the presence of survey non-response. The obtained empirical results indicate that persistent poverty measures based on balanced panel estimates that do not account for the relationship between survey non-response and the socioeconomic status of the household provide a …
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UNDERSTANDING METASTASIS MIXED - TREATMENT RESPONSES THROUGH GENOMIC ANALYSES.
… patients and even within the same individual. Response to therapy in metastatic breast cancer patients with multiple metastases can also be heterogeneous, with different degrees of responsiveness to the same drug(s) across metastatic sites, termed "mixed response," within the same patient. If …
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Responsiveness in American schools overseas: discrepancies between parental expectations and school performance
… Brazil, Chile, and Uruguay were surveyed. A low response rate reflected the nature of the population. Characteristics of non-response in overseas settings are discussed. Results were biased in favor of the politically interested/active parents. Frequencies and crosstabulations were used to …
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Investigating Tumour-Immune Cell Interactions in Paediatric Malignancies
… could unmask clinically relevant biomarkers of response and inform future trials. This thesis aimed to both understand non-response to immunotherapies and to deeply profile the TME using established and novel multi-omic analysis platforms on patient samples. To test these hypotheses, we employed …
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Factors affecting the response of thrips to an olfactory cue
… understanding of the mechanisms eliciting the response of thrips to semiochemicals is still only rudimentary and a greater understanding of their behavioural response to olfactory cues is needed to optimize the use of semiochemicals. An ecological approach has been taken to investigate the …
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Micro-Coordination: Looking into the details of face-to-face coordination
… case reports which question and challenge non-discussed, often-taken-for-granted assumptions about face-to-face interactions and coordination, and (2) tie the observations to the creation of higher level constructs which, in turn, can affect subsequent design choices. More specifically, I …
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Methods for Handling Missing Data for Multiple-Item Questionnaires
… avoided, particularly if there is a high rate of non-response. MI does not make the same assumptions as person mean imputation and may be a superior method when items are missing from a multiple-item questionnaire. Results indicate that PMI and MI provide similar results, however PMI may …
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Exporting knitted apparel. A study of the determinants of exporting performance in the UK knitted apparel sector.
… follow-up by mail and telephone generated a response rate of 70 per cent, comprising close to half of the sampling frame, that was representative of all company size bands, levels of exporting and products. The overall quality of the responses was good; tests of non-response did not find any …
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