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Why do Score Ranges change in SI?

posted Nov 16, 2011, 5:23 AM by Bryan Tayman
I've had a few questions about the change in score ranges and performance levels for Benchmark 2 as compared to Benchmark 1. Following is the response from Study Island. If further questions develop, please let me know.
 
Towards the beginning of each school year, usually in late September to early October after the state releases the previous year’s PSSA data, we do a benchmark analysis to correlate each individual benchmark to the previous year’s PSSA based on students who took that particular benchmark within a 30 day window of taking the actual PSSA.  This correlation adjusts the percent correct score of each benchmark to the associated scale scores for each Performance Level.  The correlation and scale score conversion adjusts passing parameters to account for a particular test’s difficulty.  So, if one of the benchmarks is a little too easy or a little too hard, the raw scores might seem a little high or a little low for a particular Performance Level, but the scale score conversion obtained from the analysis will place them in the correct category.

In this specific example, a percent correct score of 72.67 is needed for a student to be classified as Proficient for Reading Benchmark 1 based on an analysis done with 235 students that took Reading Benchmark 1 within 30 days of the actual 2011 PSSA and a percent correct score of 66.00 is needed for a student to be classified as Proficient for Reading Benchmark 2 based on an analysis done with 341 students that took Reading Benchmark 2 within 30 days of the actual 2011 PSSA.  This tells us that Reading Benchmark 1 is a little easier than Reading Benchmark 2, but the analysis that creates a correlation to the scale scores accounts for this and adjusts accordingly.  This is why a 66.67 percent correct on Reading Benchmark 1 correlates to Basic and the same score on Reading Benchmark 2 correlates to Proficient.


BOTTOM LINE:  Study Island Score ranges change in an attempt ensure students are appropriately and accurately assigned projected PSSA performance levels.

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