At least 97.5% of Reading items and 92.5% of Mathematics items passed the fit check, with 7 Reading and 23 Mathematics items flagged for misfit¶

Claim · All claims
Evidence · 1 study · associational r2 · q2
Currency · newest study 2020 · not yet checked against its sources · not reviewed by a person · overdue for a recheck since 2023: tool and model accuracy changes quickly

Subclaims¶

q2 i? Using point measure correlations below 0.2 plus strong or weak infit/outfit criteria, 7 Reading items (2.46%) and 23 Mathematics items (7.54%) were flagged for misfit in the AllYr sample. → He 2020 q2 i? Both the AllYr and LatestYr samples flagged the same items for misfit. → He 2020

Evidence¶

He 2020¶

He, W. (2020). MAP Growth K–2 item fit analysis: A follow-up study. NWEA. https://www.nwea.org/research/publication/map-growth-k-2-item-fit-analysis-study-a-follow-up-study/

q2 · i? · associational · r2

Flagging results in Table 2.3 for the AllYr sample of 285 Reading and 305 Mathematics items; the report concludes "at least 97.5% of Reading items and 92.5% of Mathematics items passed the fit check."

"a total of seven and five Reading items (2.46% and 1.75%) and 23 and 20 Mathematics items (7.54% and 6.56%) were flagged for misfit based on the point measure correlations and either the strong or weak criteria, respectively."

Discussion¶

Related Claims¶

• Item fit findings were the same regardless of whether the AllYr or LatestYr response sample was used — related
• The vast majority of Spanish Math (91%) and Reading (98%) items show no misfit across fall, winter, and spring terms — related
• Only about half of misfit items were flagged in common by the AllYr and LatestYr samples, which the authors found surprising — related