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 51 for “"internal validity"”.
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Reliability and validity of an expert system for landscape visual quality assessment
… assessment was evaluated for reliability and validity against four professional landscape architects, one of whom’s rules upon which the system was based, and two lay subjects. Results indicated that the system has good initial reliability and internal validity, but the external validity …
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Development of a Multidimensional Scale to Measure Attitudes Toward Workers With a Disability
… have been shown to be susceptible to threats to internal validity, such as reactivity and socially desirable responding. Further, existing direct measures have focused on unidimensional aspects of attitudes toward individuals with disabilities. Research, however, has demonstrated that attitudes …
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A behavioural checklist for the measurement of self-esteem in the classroom
… given valuable feed-back and comment on the face validity of the checklist. Because the LAWSEQ (Lawrence Self-Esteem Questionnaire) is in present use in Western Australian schools, the scores of the Behavioural Checklist were compared with the LAWSEQ self-report to establish some measure of the …
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The Effect of Leadership Training on Manufacturing Productivity of Informal Leaders
… design was used to control threats to internal validity. The one-way analysis of variance procedure (ANOVA) was used to determine if there were statistically significant increases in manufacturing productivity of informal leaders. Findings suggested that training increased the …
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Social Context and Decisions : Essays in experimental economics
… Economics provides a clean tool to keep the internal validity necessary to disentangle complex behavioral aspects that cannot be easily observed in the field, such as those related to the influence of social environment. This Doctoral Thesis is a collection of three laboratory experimental …
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PRECIS-2 : Making trials matter: providing an empirical basis for the selection of pragmatic design choices in clinical trials
… of candidate PRECIS-2 models was followed by validity and reliability testing of the most promising PRECIS-2 candidate using a sample of 15 trials rated by 19 different trialists. The validated PRECIS-2 tool was then used to consider the risk of bias (internal validity) and estimates of …
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The Effects of Distraction on Confidence Rating Reactivity During Cued-Recall
… reactivity is often interpreted as a threat to internal validity, research using metacognitive judgments has demonstrated that asking individuals to predict future performance at study can promote memory on subsequent tests of cue-target word pairs. An important question is whether these …
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Anticorruption in Public Procurement - A Qualitative Research Design
… develop rigor results, the concepts of external validity, construct validity, internal validity and reliability are applied. The research design was adopted in two field investigations: A first project focuses on the challenges and chances for anticorruption when awarding contracts in a …
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Robustness of Multiple Imputation under Missing at Random (MAR) Mechanism: A Simulation Study
… to deal with missing data in order to maintain internal (power of study) and external (generalization of sample results to larger population) validity of study. The focus of this dissertation is to compare different methods to deal with missing data in controlled clinical trials and public …
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Theory and outcome evaluation of the Allan Gray Orbis Foundation (AGOF) association programme
… Additionally, the outcome evaluation reveals internal validity concerns, highlighting the absence of a control group and reliance on self-reported data, which may limit causal attribution. To enhance programme impact, the study recommends integrating financial literacy training with structured …
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The measurement properties of the inventory of reading occupations: An assessment tool of children's reading occupations
… model of Rasch indicating strong construct and internal validity. The study also determined the ability of the IRO to reliably separate children in a continuum of reading participation, indicating strong test reliability. The qualitative clinical and classroom utility study of the IRO included a …
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Exploratory research into IT's support of organisational agility : concept development and pilot testing of an assessment instrument
… subjected to pilot testing for reliability and validity. No causal model is posited in this research. High measurement scale reliability was reported although concerns of multicollinearity caution against over reliance of these results. Given the limited focus of this pilot testing and the …
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Distinct Memory Profiles in Children with Learning Disabilities: a Neuropsychological Perspective
… and iterative partitioning cluster analysis. Internal validity of the final cluster solution was established using multiple-method reliability techniques. Comparison of the results obtained using several two-stage cluster analyses strongly suggested the presence of five memory subtypes. Three …
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The making of impact: Causal validity and epistemic justice in international development impact evaluation
… the manifestation and negotiation of causal validity and epistemic justice in international development impact evaluation (IDIE), with a specific focus on agricultural interventions. Drawing on Ernest House's (1980) assertion that evaluations should be not only true but also just, and Donald …
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Factors Affecting Focal Cerebral Ischemic Infarction: Inferences from Experimental Modelling in Macaques and Murines
… in the background of the thesis. As such, the internal validity of animal models, and the external validity of these models in the translation to human stroke is currently unknown.
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Assessing the Influences of Electronic Flight Bags on General Aviation Single Pilots’ Situation Awareness in Various Conditions
… their situation awareness. However, the study’s internal validity was limited because many participants had more experience with EFBs than paper documents. Future research should include a larger sample size, including pilots who exclude using paper-based flight bags during flight.</p>
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Comparing outcome measures derived from four research designs incorporating the retrospective pretest.
… science research to battle key threats to the internal validity of posttest-only control-group and pretest-posttest only designs. The purpose of this study was to compare outcome measures resulting from four research design implementations incorporating the retrospective pretest: (a) …
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An Online Academic Support Model for Students Enrolled in Internet-Based Classes
… recommendations from Congos and Schoeps, the internal validity of the groups was confirmed by conducting independent t-tests comparing the students' cumulative credit hours, grade point averages, college entrance test scores, and first exam scores. The study's four null hypotheses were tested …
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An item evaluation of a newly–developed strength–based approach scale in a South African working population
… scale are unidimensional, 3) to determine the internal validity and reliability of the new SBA scale, and 4) make recommendations for future research. A cross-sectional quantitative research design was used whereby online and hardcopy versions of the questionnaire were distributed to …
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Effects of Cooperation and Competition on Preschoolers' Prosociality Toward Third-Parties
… Thus, we conducted three studies with high internal validity (i.e., high comparability between conditions) to examine the effect of cooperation and competition on preschoolers’ sharing and social inclusion while considering children’s success and engagement in these interactions as potential …
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