Mixing sequence as well as method validity was investigated by numerical simulation.
Main Outcome Measures: Intra- and interrater reliability; construct validy by known groups method; concurrent validity by comparisons with 6-minute walk test, Comorbidity Index, age, and time since amputation; predictive validity by comparison with 6-minute walk test after controlling for other factors.
Methods: Validity and reliability were tested by comparing neurologic examination scores obtained using our wireless system, which transmits video of a patient from a moving ambulance to desktop computers, with those obtained using the National Institute of Neurological Disorders and Stroke training videotape.
The in-situ three-channel method proved its validity by showing corresponding result with that obtained from the experiments and CFD simulation at the same experimental condition.
Each item of the measurement method (instrument) has been evaluated for content, feasibility, reliability and validity by methods that are widely used in psychometry but less familiar in medicine.
We have found that the denaturation of solutions of egg albumin and hæmoglobin subjected to X-rays (the denaturation kinetics of which in the intact state is known2) can be defined quantitatively by the usual coagulation method, its validity being established by order of reaction studies on dilutions of the complex irradiated systems.
Fourth, the study results are based on highly selected patients using the propensity score methods, which limit the external validity [ 28] of the findings, despite confirmation of internal validity by conventional regression methods.
We addressed the threats to validity by employing epidemiological methods as transferred to this field by the hierarchical step-model for study design, analysis and data interpretation.
The Reynolds number, block geometry and bypass flow area ratio are varied to search for an optimal channel spacing using the EGM method whose validity is borne out by comparing with those obtained by the conventional thermal optimization (or overall thermal conductance) method.
We also demonstrated the internal consistency reliability, the construct validity, and the discriminate validity by using various psychometric testing methods.
