British Picture Vocabulary Scale

About the measure

Rating Psychometric

Rating Implementation

Subscales

Target construct

Oral language: Receptive vocabulary

Test Authors

Dunn, Dunn, Styles, Sewell

Publisher

GL Assessment

Implementation

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

3 years to 16 years and 11 months year(s)

Prior knowledge required

Speech and language therapists, educational psychologists, experienced ASfL teachers

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

Scoring clear and transparent

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

Norm referenced 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

Norm referenced

Standardisation sample

3278 in 8 age ranges in England, wales, Scotland and Northern Ireland

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.

Built into the confidence bands (confidence intervals 95%)

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

Validity: W.I.S.C. ‑0.76, Schonell 0.80.

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.

Correlated with CATS verbal battery 0.72 with overall CATS scores 0.61

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.

Concurrent validity established with CDI (.32 -.41)