Using Word Identification Fluency to Monitor First-Grade Reading Development

Area of Science:

• Educational Psychology
• Developmental Psychology
• Applied Linguistics

Background:

• Word identification fluency (WIF) is crucial for assessing early reading development.
• The design of WIF assessments, specifically sampling breadth, may influence their effectiveness.
• Understanding these effects is key for accurate screening and progress monitoring in first-grade students.

Purpose of the Study:

• To evaluate how different sampling breadths (broad vs. narrow) affect the technical features of WIF.
• To determine the optimal sampling strategy for screening and progress monitoring across diverse reading achievement groups.

Main Methods:

• Assessed WIF using broadly and narrowly sampled word lists over 15 weeks in first graders.
• Included a representative sample (n=284) and subgroups with low (n=202) and high/average (n=213) reading achievement.
• Utilized criterion measures in fall and spring to assess predictive validity.

Main Results:

• Narrow sampling demonstrated superior predictive validity for screening the representative and high/average achievement subgroups.
• Broad sampling proved more effective for screening the low-achieving subgroup.
• Broad sampling was also superior for progress monitoring across all student groups.

Conclusions:

• The choice of sampling breadth in WIF assessments should be tailored to the specific goal (screening vs. progress monitoring) and student subgroup.
• Broad sampling appears more advantageous for identifying and supporting struggling readers and for tracking growth over time.
• Narrow sampling offers better precision for screening students with average to high reading abilities.