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Statistics in Educational Research

Statistics in Educational Research. Rebecca Henry, Ph.D. OMERAD College of Human Medicine Michigan State University. Working With Statisticians. What will s/he want from you? The Research Question/Purpose ---Uhhh! Keep it Simple Description of Design 2 Group Case Control

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Statistics in Educational Research

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  1. Statistics in Educational Research Rebecca Henry, Ph.D. OMERAD College of Human Medicine Michigan State University

  2. Working With Statisticians • What will s/he want from you? • The Research Question/Purpose • ---Uhhh! Keep it Simple • Description of Design • 2 Group Case Control • Medical School Dropouts • Medical School Graduates • Cross Sectional Survey of Preceptors • Description of Variables IV & DV • Level of Measurement • Nominal/Dichotomous • Ordinal • Interval

  3. Components of the Research Question/Hypothesis Variables Independent (predictor) The variable that is doing the causing or explaining. Examples: Gender, educational interventions, SES can all be powerful explainers or influences of outcome.

  4. Dependent (criterion or outcome) A variable that is expected to be affected by an independent variable. Examples: Test scores, practice choice, satisfaction and performance abilities are often influenced by other variables. Caution - some studies don’t distinguish this way. For example, a relationship study that examined scores on NLME Part II with a department developed exam

  5. Nominal: Categorical Male - Female Better - Worse Learning Styles Ordinal: Order Class Rank Tumor Classification Hi - Med - Low Interval: Equal Distance Between Point Temperature IQ Scores Standardized Measures Lickert Scales Cost Ratio: Meaningful Zero Height Weight Levels of Data

  6. INDEPENDENT Nominal (2 values) Nominal (> 2 values) Interval DEPENDENT NOMINAL NOMINAL INTERVAL (2 VALUES) (> 2 VALUES) t/z Test Chi-square Chi-square (Mann Whitney U) Analysis of Chi-square Chi-square Variance (ANOVA) Correlation/ Logistic Discriminant regression regression analysis Bivariate Analysis

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