Analyzing Relationships Between School Libraries and Academic Achievement. Keith Curry Lance Director Library Research Service Colorado State Library & University of Denver. Outline. Background Research questions Data types & sources Statistical concepts & techniques “Success stories”.
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Keith Curry Lance
Library Research Service
Colorado State Library & University of Denver
Are students more likely to “pass” tests if they have a school library than if they don’t?
Are students likely to score higher on tests if they have a school library than if they don’t?
As the school library improves, do test scores rise?
How are different qualities of school libraries, schools, and communities related to each other?
Do school libraries & test scores improve together, even when other school & community conditions are taken into account?Research Questions
Nominal school library than if they don’t?
No necessary quantitative dimension
Pass/fail, library/no library
Degrees of difference
No equal intervals
Zero is just a code
Usually limited number of values
True zero (have none of something)
Usually large number of values
Weekly hours of librarian staffing, test scoresTypes of Data
Dependent variable school library than if they don’t?
“The effect” in a cause-and-effect relationship
Reading test scores used to “operationalize” concept of academic achievement
“The causes” in a cause-and-effect relationship
Characteristics of school libraries, schools & communities
“Treatment” or predictor variables
“Control” variablesTypes of Variables
Experiment school library than if they don’t?
More precise units of analysis (student)
More control over independent variables
Easier to explain, communicate
Less precise units of analysis (school)
Less control over independent variables
Data availability issues
More precise measurement of effectsExperiment v. Statistical Analysis
Chi-square = 12.743, p < .001
t = 3.963, p < .001
p < .001
Initial eigenvalue = 4.638, 77% variance explained
p < .01
Excluded variables: teacher-pupil ratio, per pupil expenditures, teacher characteristics