S0116 · tennessee_star_study · registry identity
Tennessee STAR Class Size Study
External resolution
Resolution status: ambiguous
How Hirsch uses it
Every occurrence, grouped by book and chapter, with the claim it was linked to support and (where the extraction regenerated one) the underlying warrant.
2006 · The Knowledge Deficit
The Student Achievement Teacher Ratio (STAR) study, which used large numbers of students randomly assigned to control and experimental groups to study class size.
direct The Tennessee STAR study was 'exemplary' and 'punctilious' in its data-gathering techniques, meaning its failure in California was a failure of theoretical application rather than statistical method.
Warrant (implicit): Strict adherence to randomization and statistical protocols ensures that an experiment's internal data collection is technically flawless, regardless of the study's eventual policy utility.
could fail ifTechnical precision in randomization does not account for 'attrition bias' if certain types of students drop out of the study over time.
The Tennessee STAR study on class size, which Hirsch argues lacked theoretical depth regarding opportunity costs.
direct The Tennessee STAR class-size study failed to adequately address theoretical questions regarding unanalyzed opportunity costs.
Warrant (implicit): A study is theoretically incomplete if it focuses solely on the direct effects of an intervention without measuring the resources or time diverted from other beneficial activities.
could fail ifThe study might have purposefully narrow boundaries to isolate a single variable, making the 'omission' a feature of experimental design rather than a flaw.
The STAR experiment is cited as an example of a research-based study that shows positive effects but must still be evaluated for theoretical efficiency.
direct The mere existence of research showing positive effects for an instructional method does not mean the method is efficient or superior.
Warrant (implicit): Statistical significance and positive outcomes are insufficient metrics for educational success if the intervention requires disproportionate resources compared to alternative methods.
could fail ifEfficiency is a subjective value judgment that varies based on a school district's specific budget and priorities.
2016 · Why Knowledge Matters
The Tennessee STAR study as an example of classroom-level research that proved to be a poor guide for general policy despite random assignment.
direct Causal insights from basic science are a more reliable guide to educational policy than classroom-level research with uncontrolled variables.
Warrant (explicit): The failure of a large-scale randomized trial to produce generalizable results indicates that policy should be guided by laboratory-derived causal laws rather than field-based experimental research.
could fail ifBasic science findings often fail to translate to the 'noisy' environment of a real classroom, making them less reliable for policy than even flawed field studies.
Raw source_reference strings seen
As they appeared before normalization/consolidation into this source identity.
Endnote 7Tennessee STAR study