Product Code:
579093 ()
978-1-59857-909-3 ()
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Test of Integrated Language and Literacy Skills (TILLS) is a reliable, valid assessment of oral and written language skills in students ages 6–18 years. This streamlined assessment can typically be administered in 90 minutes or less and used to support decisions on appropriate next steps. TILLS is a comprehensive, norm-referenced test that has been standardized for three purposes:
  • To identify language and literacy disorders
  • To document patterns of relative strengths and weaknesses
  • To track changes in language and literacy skills over time

TILLS is ideal for evaluating students suspected of having primary language impairment, suspected of having a learning or reading disability, those known to have an existing condition associated with difficulties in spoken and written language, and students struggling with language and literacy comprehension or social communication skills.

This concise manual presents the powerful research and technical data behind the TILLS. Find clear answers to frequently asked questions about the technical data as you learn the specifics of the validity of TILLS, the reliability of TILLS, and the evaluation and reduction of test bias. Get valuable information on:
  • Test development using item response theory procedures
  • Measurements of validity for each of the three purposes of TILLS
  • Documenting patterns of relative strengths and weaknesses and tracking change over time
  • TILLS sensitivity and specificity levels, broken down into 9 age bands meaningful to the development of language and literacy skills
  • Removing or minimizing item-level bias and subtest-level bias