GRETTA - Measure compare

1. Easy CBM vs DORF:
An Oral Reading Fluency Measure
Comparison
by Gretta Sagolla & Lea Jones

2. Oral Reading Fluency
Students’ ability to read connected text as
measured by the number of correct word
read per minute in a grade level passage.
Attributes: Rate, accuracy, prosody

3. Purpose &Target Population
Easy CBM DIBELS
•Used as part of the RtI •Used as part of the RtI
framework framework
•Benchmark assessments & •Benchmark assessments &
Progress Monitoring progress monitoring
•Provides reading risk levels •examines instructional
to inform instructional effectiveness of curricula
decisions
•DIBELS data base
•District level reports
•Middle of 1st grade through
•1st through 8th grade 6th grade
•Spanish version- IDEL

4. Basic Description
Easy CBM DIBELS
• Formative and norm referenced • Criterion referenced, can be locally
normed
• 20 forms: 3 benchmark, 17 progress
monitoring • 32 total forms: 3 each for Fall, Winter
and Spring benchmarking, 20
• assessed one on one with scripted alternate for progress monitoring, 3
directions in quiet environment surveys
• 1 minute to read a single grade level • one on one, scripted, quiet
passage out loud environment
• total words read- errors= cwpm • Benchmark measures: 3 passages, 1
minute timings
• 2-3 minutes per student
• raw score = median total words read
minus median errors
• ~6 minutes per student

5. Scales
Easy CBM DIBELS
• Raw scores= cwpm • Raw scores = cwpm
• Ordinal Scales • Benchmarking:
median total words -
• high risk, some median errors
risk, low risk
• percentile ranking of • Ordinal Scales
individual students • core, strategic, or
intensive support

6. Reliability
Easy CBM DIBELS
• Alternate form .86- .97 Words Correct
• Test-retest > .9 • Test-Retest, Alternate
Form & Inter-Rater
• Very strong reliability Reliability >.90
• building, classroom, and Accuracy
high stakes individual
decisions • Test-Retest, Alternate
Form & Inter-Rater
Reliability >.8
• informs decisions at
all levels

7. Validity
Easy CBM DIBELS
• .672 WA State MSP • >.64 GRADE using the
40th %tile as an indicator
• >.5 OAKS
• not great, but good • Predictive for success at
benchmark on DIBELS
• Predictive for Fall and • informs instruction
Winter Benchmarks
• Concurrent for Spring
• informs instruction

8. Recommendations for Use
•District wide Benchmarking and progress monitoring
•Informs decisions on instructional grouping, curricular supports
•For use within the RtI framework
Easy CBM DIBELS
• Ease of training • DIBELS Data system
• IA’s, leadership, teachers • cross year data
analysis
• Distribution Reports
• Summary of
effectiveness

9. Sources