Test identification

Name of test CEM Yellis
Subjects Maths
Summary An adaptive baseline assessment for students aged 14-16, measuring vocabulary, mathematics and non-verbal ability.

Assessment screening

Subscales Vocabulary – word fluency and understanding, Mathematics – logical thinking, manipulating numbers and numerical concepts, Non-verbal ability – ability to match patterns, reflections and rotations and apply visual intuition
Authors Cambridge Assessment
Publisher CEM
Test source https://www.cem.org/yellis
Guidelines available? Yes
Norm-referenced scores. Yes
Age range 14;0-16;11 Years
Key Stage(s) applicable to KS4
UK standardisation sample Yes
Publication date Ongoing
Re-norming date n/a


Validity measures available? No
Reliability measures available? No
Reason for exclusion from shortlist shortlisted but insufficient information available to evaluate

Evaluation and Appraisal

Response format

Assessor requirements

Is administration scripted? No


Construct Validity

Does it adequately measure literacy, mathematics or science?

Criterion Validity

Does test performance adequately correlate with later, current or past performance?


Is test performance reliable?

Is the norm-derived population appropriate and free from bias?

Is population appropriate and free from bias? No