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.
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Showing 1 to 20 of 845 for “"control groups"”.
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Analysis of Virtual Control Groups and Inter-species Concordance using Preclinical Toxicity Data
… upon. Firstly, the potential use of Historical Control Data (HCD) in the form of Virtual Control Groups (VCGs) to replace or supplement Concurrent Control Groups (CCGs) in preclinical toxicity assessment. The scientific motivation of using HCD are its ability to increase the external validity of …
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Monte Carlo simulation with parametric and nonparametric analysis of covariance for nonequivalent control groups
… been designed to measure change in nonequivalent control group studies, but because of assumption violations and potential artifacts, there is no one form of analysis that always appears to be appropriate. While the parametric analysis of covariance and parametric ANCOVAS with a covariate …
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The Regional Economic Effects of Commercial Passenger Air Service at Small Airports
… data and assess the feasibility of using matched control groups to balance variables across treatment and control groups. I modify Genetic Matching methods to create control groups balanced on a large number of variables and use quasi-experimental differences-in-differences models to examine how …
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The Effects of Allatecomy on Flight in Honey Bees
… and significantly lower metabolic capacity than control groups. MCA- bees were intermediate and not significantly different than the CA- or control groups. These results are consistent with the hypothesis that the absence of the corpora allata inhibits the development of sufficient metabolic …
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Visually displayed-EMG biofeedback : training muscle relaxation in hearing impaired children :a thesis ...
… randomly assigned to either an experimental or control condition. Participants in the experimental groups were given five 15 minute EMG biofeedback training sessions. An additional group of 4 adolescents with normal hearing from Marshall Junior High School, Stockton, CA served as a hearing …
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An evaluation of an orientation to college course in a community college setting
… In a quasi-experimental design, Treatment and Control groups of full-time, first-time, degree-seeking students were selected from three fall semesters. Treatment groups consisted of students who had successfully completed the orientation course. Control group students were matched to treatment …
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An Analysis of the Relationship Between Newly Constructed or Renovated Ohio High Schools and Measurable Student Data Indicators
… the Ohio School Facilities Commission and the control group which did not build or remodel high schools. Data was collected for 2005 for nine indicators of academic achievement and measures of student behaviors and compared to data for the same indicators for 2011. The data was analyzed by …
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An evaluation of the effectiveness of the Preschool Life Skills program on Icelandic first-grade elementary students
… the behavior of the experimental group to the control groups. The teacher of the experimental group was trained to implement the PLS in their classroom. Direct observation was used to assess behaviors. The observed teacher behaviors included waiting until a child looked up before giving …
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Autokinetics: a group intervention to mitigate at-risk behaviors in adolescents
… situations. The research was conducted in small groups of eight to ten students over a six-month period. The two experimental and two control groups were randomly selected. All four groups attended a forty-minute weekly group session while autokinesis was used only in the experimental groups. The …
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The Effects Of A Career-Planning Course On Community College Students' Career Self-Efficacy And Career Indecisiveness
… this study. A quasi-experimental nonequivalent control group research design was used for this study. To determine if the experimental and control group were similar on the pretest scores for the five subscales measuring career decision-making self-efficacy, t-tests for two independent samples …
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Oxytetracycline Induced Photosensitivity in Channel Catfish (Ictalurus punctatus)
… was evaluated in channel catfish. In a controlled experiment, only oxytetracycline-injected fish that were exposed to direct sunlight exhibited necrotic ocular and dorsolateral epidermal lesions. All of the affected fish died within 8 d. All of the fish from three different control …
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The Keller Plan in college introductory physical geology : a comparison with the conventional teaching method
… experienced the Keller Plan treatment and two control groups consisting of 18 students each received the conventional method of instruction. </p><p> Four specific areas of investigation were tested: (1) knowledge of geology, (2) changes in attitude toward science, (3) improvement in …
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Investigative links between cognitive function and moderate-to-vigorous physical activity in elementary physical education
… a balanced design (intervention, balance, and control groups). It was found that the intervention group had a large increase in planning abiHty (ES = 1.67) when compared to the balance (ES = .80) and control (ES = -.89) groups. On the three remaining cognitive functions, the intervention group …
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Role of High Molecular Weight Hyaluronan in Ultraviolet B Light-Induced Transformation
… of visible lesions per mouse compared to the control groups. None of these lesions were neoplastic; in contrast, approximately 20% (7/34) of lesions were neoplastic in control groups. These results show that HA-PE protects against UVB-induced keratinocyte transformation, suggesting that HA-PE …
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Effects of physical movement in rhythm instruction in early instrumentalist development
… in a middle-class school district (N=18). The control group was given four weeks of traditional rhythm instruction, with a traditional counting method. The experimental group was given rhythm instruction incorporating physical movement over a period of four weeks. Prior to the lessons, both the …
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Long-term neurodevelopmental effects of acute organophosphate poisoning amongst South African children
… the performance of acute OPP survivors to two control groups matched for age, sex, and home language. Methods: A case-control study was conducted. A group of OPP survivors (cases) was compared to two control groups: (1) children admitted for paraffin poisoning; and (2) children admitted for …
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Training of Self-Study Spelling Strategies and their Effectiveness on Fourth Grade Students
… fourth graders comprised the treatment and control groups. Two fifteen word banks were constructed to serve as pre and posttests. With no directions as to which study strategies to employ, students in both groups were asked to study word lists for 15 minutes. Following the allotted time, the …
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Observations of Emergent Literary Behaviors in a Literacy-Enriched Play Environment: Does Teacher Guidance Make a Difference?
… behaviors were used to compare the treatment and control groups. There were differences in literacy behaviors between the experimental and control groups.
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Effects of implementing kinesthetic activities in the classroom
… school in Southern New Jersey. There were two control groups and two experimental groups. Throughout the three-week study, the experimental groups were presented with kinesthetic lessons, visual instruction and auditory instruction. The control groups received only visual and auditory …
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Teaching with Cloze: Its Effect on the Reading Comprehension of Poor Readers
… scores occurred between the treatment and control groups on a standardized reading achievement test. Five subskills of comprehension measured by this test were identified and analyzed to determine which subskill areas were affected by the use of cloze. A secondary purpose was to determine …
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