Clinical Evaluation of Language Fundamentals

About the measure

Rating Psychometric

Rating Implementation

Subscales

Receptive and expressive subscales. Scores for separate scales which vary significantly in reliability and validity

Target construct

Oral language: Expressive and receptive language skills

Test Authors

Wiig, E. H., Secord, W. & Semel, E.

Publisher

Pearson

Implementation

AgeⓘAge (in years) covered by the survey. Using the measure outside this age range may result in inaccurate information.

3 years to 6 years year(s)

Prior knowledge required

Psychologists , speech or occupational therapists, mental health professionals and health practitioners with appropriate Graduate and professional qualifications in their field of practice.

ScoringⓘStandardised: Can easily be summed or averaged Complex: Requires judgement or assessment on behalf of the scorer

Subscales vary in transparency of scoring. Instructions and criteria stated

TimeⓘAn estimate of the time (in minutes) taken for an individual to complete one survey

Both min(s)

Psychometric

UK normsⓘWhether the measure has been calibrated with a UK sample (as opposed to generating psychometric details from a Foreign (e.g. USA) sample).

YES

Norm / Criterion referenced

Both

Standardisation sample

486 (UK)

ReliabilityⓘWhere observations (e.g. teacher or peer report rather than self report) are used, this measure of reliability indicates how closely related each score is. A higher value suggests a more reliable measure.

Test-retest ranged from 0.77 to 0.96 (for ages 3 to 3,11) and 0.74−0.95 (for ages 4 to 4,11). Cronbach’s alphas ranged 0.77 to 0.95. Inter rater reliability ranged 0.95 to 0.97

Criterion validityⓘAn assessment of how well the measures relates to other, well-validated assessments.

Co-normed with PLS‑4 and CELF‑4

Construct validityⓘFurther to the use of CFA and EFA, this reports any details demonstrating how well the measure is seen to represent the conceptual domain it comes from.

Core language has a high correlation with other composites ranging from 0.85 to 0.93. Receptive and expressive language correlate 0.76

Concurrent validityⓘSimilar to Criterion, this is a measure of how well the measure relates to other similar (or dissimilar) domains, as evidence of its validity.

The study conducted to compare the CELF‑5 with the CELF‑4 consisted of 1000 typically developing students between the ages of 5 – 16. Correlations between overall scores and index scores were high and ranged from .78 – .92.