5 Good Validity Good Precision Poor Precision Poor Slides: 40 Download presentation 5 Good Validity ตรง Good Precision เทยง Poor Precision ไมเทยง Poor Validity ไมตรง 6 Random error ผลการศก ษา A=B A≠B ความเปนจร ง A=B A≠B confidence ß error Power 9 Systematic error (Bias) Ø Ø Ø Selection bias (sample distortion bias) Information bias (misclassification bias) Confounding 12 Study sample Source population ตวอยางใน ปวย Sampling Case control study ไมป วย Sampling =Exposed =Not Exposed 25 ลกษณะของ confounder Confounding Exposure Causal association Outcome = Non-causal association = 27 Confounding Effect 1. Negative unadjusted RR 28 Confounding Effect 2. Positive unadjusted RR 29 Confounding Effect 3. Qualitative unadjusted RR 33 การควบคม confounder Ø ในขนตอนวธการศกษา § § § Ø Randomization Restriction Matching ในขนตอนวเคราะหขอมล § § Stratified analysis Mathematical model (multivariate analysis) 38 Multivariate analysis Ø Linear Regression § Ø continuous เชน Logistic Regression § Ø Outcome เปนตวแปร ระดบนำตาลในเลอด Outcome เปน dichotomous เชน การปวยไมปวย Proportional hazards regression § Outcome เปน time to event Criterion related validity definitionAccuracy and precision labNon-precision instruments areDifference between precision and semi precision attachmentsSingle precision vs double precisionExcellent very good good fair poor scaleGood afternoon animadoNothing compares to your embraceGood deeds good thoughtsCómo se dice buenas tardesGood afternoonInternal validityConsequential validity in assessmentConvergent validityLanguage testingValidity reliability practicalityConvergent validityPreserving statistical validity in adaptive data analysisExample of frequency claimLogical validity adalahGood testContoh validitas dan reliabilitasFace validity definitionValidity scales of mmpi-2Four types of validityReliability vs validityKabc-iiSwitching replications designInternal validity psychologyValidity vs reliabilityDefine convergent validityMono-operation bias examplesExamples of concurrent validityForms of validityTest validity meansEcological validity definitionWhat is external validity in researchNo conclusion formulated in quantitative researchConstruct validity meaningMean count per interval ioaRating scale questions examples