NWEA Understanding Normative Data 4 — Questions and Answers
Question 1: What is the primary purpose of 'aspirational' or 'college readiness' benchmarks sometimes reported alongside NWEA norms?
- To replace normative percentile ranks entirely
- To identify the RIT score associated with a high likelihood of college and career readiness, distinct from typical peer performance (Correct answer)
- To set the minimum score required to pass a state assessment
- To compare international student performance to US norms
Correct answer: To identify the RIT score associated with a high likelihood of college and career readiness, distinct from typical peer performance
College readiness benchmarks indicate the score level associated with academic preparedness for post-secondary success, which may be higher or lower than the national average.
Question 2: A student's MAP Growth score places her at the 72nd percentile in reading. A teacher interprets this as meaning she answered 72% of questions correctly. Why is this interpretation wrong?
- Percentile rank reflects relative standing in a norm group, not the proportion of items answered correctly (Correct answer)
- The student actually answered 28% of questions correctly since the test adapts
- Percentile rank and percent correct are the same for adaptive tests
- The 72nd percentile is calculated from the Lexile score, not the RIT score
Correct answer: Percentile rank reflects relative standing in a norm group, not the proportion of items answered correctly
Percentile rank describes how the student compares to the norm group, not item-level accuracy; an adaptive test intentionally aims for roughly 50% correct regardless of ability.
Question 3: When NWEA reports 'Typical Growth' for a student, what two data points are required to look up the expected growth value?
- Current RIT score and school enrollment size
- Starting RIT score and the grade level at the beginning of the measurement period (Correct answer)
- End-of-year RIT score and the student's age
- State proficiency cut score and the student's IEP status
Correct answer: Starting RIT score and the grade level at the beginning of the measurement period
NWEA typical growth norms are conditioned on the student's starting RIT score and grade level, so both are required to identify the correct expected growth value.
Question 4: Across NWEA subjects, which pattern in normative data is generally observed as students progress from early elementary to middle school?
- Average RIT scores decrease while standard deviations increase
- Average RIT scores increase while the rate of annual growth slows (Correct answer)
- Average RIT scores remain constant; only growth rates change
- Average RIT scores increase at an accelerating rate through grade 8
Correct answer: Average RIT scores increase while the rate of annual growth slows
Norm data consistently shows that mean RIT scores rise with grade level, but the typical annual growth increment shrinks as students advance.
Question 5: A principal notices that her school's mean RIT in math is above the national norm mean. Which additional piece of normative information would BEST determine whether this is driven by high growth or simply a high-scoring incoming cohort?
- The school's student-to-teacher ratio
- The school's fall-to-spring growth compared to growth norms for the same starting RIT (Correct answer)
- The percentage of students who qualify for free or reduced lunch
- The school's overall proficiency rate on the state assessment
Correct answer: The school's fall-to-spring growth compared to growth norms for the same starting RIT
Comparing the school's actual growth to the growth norms for students with the same starting RIT distinguishes high incoming achievement from high within-year growth.
Question 6: What does a negative Conditional Growth Percentile (CGP) outcome indicate?
- The student lost RIT points, which is impossible on MAP Growth
- The student's growth was below what is typical for peers with the same starting score (Correct answer)
- The student's score fell below the 1st percentile
- The student did not complete the full assessment
Correct answer: The student's growth was below what is typical for peers with the same starting score
A CGP below 50 — including very low values — means the student grew less than typical peers who began the year at the same RIT score.
Question 7: How does NWEA account for the fact that different districts test at slightly different times within a testing window when applying seasonal norms?
- Districts must test on the exact first day of each window or scores are excluded
- NWEA applies prorated growth adjustments based on the number of instructional days elapsed (Correct answer)
- All scores within a window are normed identically regardless of the exact test date
- Districts choose which norm table to apply based on their local calendar
Correct answer: NWEA applies prorated growth adjustments based on the number of instructional days elapsed
NWEA prorates expected scores and growth based on actual instructional days, accounting for when within the window a district tests.
NWEA Understanding Normative Data 4
What is the primary purpose of 'aspirational' or 'college readiness' benchmarks sometimes reported alongside NWEA norms?