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Developing the Tests for NCLB: No Item Left Behind. Steve Dunbar Iowa Testing Programs University of Iowa. Test Development: A Technical Concern. Procedures are well-established – it’s sort of a ‘rocket-art’

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developing the tests for nclb no item left behind

Developing the Tests for NCLB:No Item Left Behind

Steve Dunbar

Iowa Testing Programs

University of Iowa

test development a technical concern
Test Development: A Technical Concern
  • Procedures are well-established – it’s sortof a ‘rocket-art’
  • Aspects of ‘quality’ that seem distinct to an observer are inseparable to a developer
  • Quality control requires resources – talent, time, and money – to do well
  • TD is the grunt work of assessment
best practice in test development
Best Practice in Test Development
  • Interpret content standards; translate intotest specifications
  • Search for stimulus material; draft items
  • Prepare material for field testing
  • Oops – we forgot about finding the kids to participate in field testing, many comparable samples of them
more best practice in td
More Best Practice in TD
  • Administer, retrieve, and score tryout materials; get item analysisresults to TDers
  • Prepare more material for field testing
  • Oops – more kids for field testing, more comparable samples
what do we get from best practice
What do we get from Best Practice?
  • Something elusive (important content, interesting materials, good questions, cognitive complexity, comparability)
  • Something intangible (fairness, alignment with standards, intended consequences)
  • Something concrete (coverage, rater reliability, a validity or generalizability coefficient, acceptable cost)
some td half truths
Some TD Half Truths
  • Multiple Choice ItemsDevelopment is hard Scoring is easy (and public)Quality Control built in to TD process
  • Open-ended ItemsDevelopment is easyScoring is hard (and private)Quality Control elusive due to scoring
comparability in test materials
Comparability in Test Materials
  • Test form as the unit for judging comparability
  • Easy to achieve with many items on the test and many potential throwaways in the pool
  • Experienced test development staff
  • Good field testing and scoring needed
group differences and fairness
Group Differences and Fairness
  • TD seeks a balance
  • Tension is that balance requires questions, lots of them
  • Instructional influences confounded with group effects
  • DIF requires good matching questions
cost factors in large scale testing
Cost Factors in Large-Scale Testing
  • Development CostsRecur with each test formAre fixed by instrument design
  • Scoring CostsRecur with each test administrationMay change because of ‘unexpected’ circumstances
validity in test development
Validity in Test Development
  • Best practice ensures content quality, balance, and alignment with standards – critical aspects of validity & reliability
  • TD is predicated on anticipated use
  • Other aspects of validity & reliability aren’t understood until it’s too late, i.e. when the test is operational
validity capacity in nclb
Validity & Capacity in NCLB
  • NCLB is census testing
  • Census testing places heavy demands on TD and other aspects of an accountability system
  • Limit on capacity in TD meansonly 1R, or 2Rsfewer rounds of field testing dwindling pools of test materials
  • No item left behind