edSpring

Letter Sound Fluency

Rating Summary

Classification Accuracyempty bubble
GeneralizabilityModerate Low
Reliabilityempty bubble
Validityempty bubble
Disaggregated Reliability and Validity DataN A
Efficiency
AdministrationIndividual
Administration & Scoring Time1-2 Minutes
Scoring KeyComputer Scored
Benchmarks / NormsYes

 

 

Classification Accuracy

Classification Accuracy in Predicting Proficiency on Nonsense Word Fluency assessment

 

Kindergarten

False Positive Rate

0.31

False Negative Rate

0.22

Sensitivity

0.76

Specificity

0.71

Positive Predictive Power

0.69

Negative Predictive Power

0.78

Overall Classification Rate

0.74

AUC (ROC)

0.80

Base Rate

0.57

Cut Points:

Target scores on LSF Spring Grade K = green – 60; yellow - 33      

Target scores on LSF Winter Grade K = green – 44; yellow – 23

Target scores on LSF Fall Grade K = green – 18; yellow – 3  

At 90% Sensitivity, Specificity equals

0.49

At 80% Sensitivity, Specificity equals

0.65

At 70% Sensitivity, Specificity equals

0.77

 

Generalizability

Description of study sample:

  • Number of States: 1
  • Gender
    • 55% Male
    • 45% Female
  • SES: 21.4% eligible for free or reduced-price lunch
  • Race/Ethnicity:
    • 81.2% White, Non-Hispanic
    • 2.4% American Indian/Alaska Native
    • 9.0% Black, Non-Hispanic
    • 9.4% Asian, Pacific Islander
    • 4.1% Hispanic
  • Disability status: 10.9% identified special education

Reliability

Type of Reliability

Age or Grade

n (range)

Coefficient Range

Coefficient Median

SEM

Information (including normative data)/Subjects

Test-retest

K

1,075

0.71

 

 

Subsample of students receiving LSF screening in Winter and Spring of grade K

 

Validity

Type of Validity

Age or Grade

Test or Criterion

n (range)

Coefficient Range

Coefficient Median

Information (including normative data)/Subjects

Concurrent

K

Letter Naming Fluency

713

0.76

 

LSF Winter with LNF Winter

Concurrent

K

Letter Naming Fluency

595

0.68

 

LSF Spring with LNF Spring

Predictive

K

Nonsense Word Fluency

467

0.57

 

LSF Winter with NWF Spring