Test of Early Literacy - Letter Naming Fluency

Rating Summary

Classification Accuracyfull bubble
GeneralizabilityModerate Low
Reliabilityfull bubble
Validityhalf bubble
Disaggregated Reliability and Validity DataN A
Administration & Scoring Time2 Minutes
Scoring KeyComputer Scored
Benchmarks / NormsYes
Cost Technology, Human Resources, and Accommodations for Special Needs Service and Support Purpose and Other Implementation Information Usage and Reporting

Annual cost per student:
AIMSweb LNF costs $4.00 per student per year.

Training manuals, administration and scoring manuals, and materials for benchmarking and progress monitoring are available for download* on Also included in the subscription is ongoing technical support available online and by phone.

*All materials are provided via download in PDF format.

Internet access is required for full use of product services.

Testers will require 1 – 4 hours of training.

Paraprofessionals can administer the test.

Pearson Assessment Inc.
19500 Bulverde Road
San Antonio, TX 78259

Phone: 866-313-6194


Access to field tested training manuals are included with AIMSweb subscriptions which provide administration, scoring, and implementation information.

Ongoing technical support is provided.

Professional Development opportunities are available.

AIMSweb LNF is an individually administered test that requires students to identify as many upper and lower case letter names as they can in one minute. The task is appropriate to administer to students at the beginning, middle, and end of kindergarten, and the beginning of first grade.

Raw score, percentile score, and developmental benchmark scores are available.

Raw scores are determined by computing the total number of letters named correctly in one minute. This data can be interpreted in a norm-referenced way via grade-based percentiles, or categorically in a standard interpretive format.


Classification Accuracy

Classification Accuracy in Predicting Proficiency on Developmental Reading Assessment, 2nd Edition
  Fall Winter Spring
False Positive Rate 0.15 0.14 0.14
False Negative Rate 0.36 0.33 0.34
Sensitivity 0.64 0.65 0.67
Specificity 0.86 0.88 0.86
Positive Predictive Power 0.72 0.75 0.76
Negative Predictive Power 0.80 0.82 0.82
Overall Classification Rate 0.77 0.77 0.79
AUC (ROC) 0.93 0.91 0.88
Base Rate 0.36 0.38 0.38
Cut Points: 27 47 53
At 90% Sensitivity, Specificity equals 0.65 0.72 0.65
At 80% Sensitivity, Specificity equals 0.75 0.79 0.75
At 70% Sensitivity, Specificity equals 0.86 0.90 0.84



Description of study sample:

  • Number of States: 1
  • Size: 1,463
  • Gender:
    • 48% Male
    • 52% Female
  • SES: 28% Eligible for free or reduced-price lunch
  • Race/Ethnicity:
    • 82% White, Non-Hispanic
    • 8% Black, Non-Hispanic
    • 5% Hispanic
    • 1% American Indian/Alaska Native
    • 4% Asian/Pacific Islander
  • Disability classification: 10% were eligible for special education services
  • Language proficiency status: 3% ELL


Type of Reliability Age or Grade n Coefficient SEM Information (including normative data)/Subjects
range median
Retest K 1,463 0.81-0.81 0.81 5.4 Ethnicity:
African American 8%
American Indian 1%
Asian 4%
Hispanic 5%
White, non-Hispanic 82%
Free/reduced lunch: 28%
ELL: 3%
Cronbach’s alpha K 1,463 0.88-0.89 0.88  
Retest K 665   0.73   Fall-winter; 2007-2008 cases in AIMSweb user database
K 674   0.82   Winter-spring; 2007-2008 cases in AIMSweb user database
K 671   0.80   Spring Kindergarten—fall Grade 1; 2007-2008 cases in AIMSweb user database



Type of Validity Age or Grade Test or Criterion n (range) Coefficient Information (including normative data)/Subjects
Predictive 1 (F) R-CBM (Grade 1 spring) 48 0.76 2007-2008 cases in AIMSweb user database
1 (F) R-CBM (Grade 2 fall) 44 0.72 2007-2008 cases in AIMSweb user database
1 (F) R-CBM (Grade 2 winter) 42 0.72 2007-2008 cases in AIMSweb user database
1 (F) R-CBM (Grade 2 spring) 44 0.73 2007-2008 cases in AIMSweb user database
Content To provide full coverage of the alphabet and avoid sequence effects, the sequence of letters on each probe is drawn randomly from the alphabet. Upper and lower case are used at random.