C CELF-5 Monica Barreto Yale Child Study Center, New Haven, CT, USA Synonyms ▶ CELF-5 a student’s unique needs, their functional language, and the language behaviors in both clinical and educational settings (Wiig et al. 2013b). Across settings, assessment begins with gathering information regarding the presence of a language disorder and/or a student’s language performance at school and at home. The CELF-5 provides that Observational Rating Scale (ORS), as a tool to systematically document observations as a means to provide descriptive information to help develop plans for intervention. Description The Clinical Evaluation of Language Fundamentals–Fifth Edition (CELF-5; Wiig et al. 2013a) is a battery of tests designed to assess, diagnose, and measure changes in oral and written language and verbal and nonverbal communication in individuals 5–21 years of age. The CELF-5 can be used to identify strengths and weaknesses in language, determine service eligibility, provide intervention strategies, and measure intervention efficacy. The CELF-5 is individually administered by speechlanguage pathologists, school psychologists, special educators, and diagnosticians with training and experience in administration and interpretation of individually administered standardization language tests and knowledge of language structure rules. The CELF-5 provides the flexibility of administering only the tests needed to answer referral questions for assessment and evaluation. Thus, the testing process can be individualized to meet Diagnostic Battery The CELF-5 provides a better balance of items across receptive and expressive modalities, language content, and overall structure than its previous editions (Wiig et al. 2013b). It has been developed and researched to enable examiners the flexibility of using each group of items independently (e.g., Linguistic Concepts, Semantic Relationships, and Understanding Spoken Paragraphs) of one another. The CELF-5 battery includes revised tests from previous editions as well as new tests used to evaluate word meaning and vocabulary (semantics), word sentence structure (morphology and syntax), the rules of oral language used in responding to and conveying messages (pragmatics), the recall and retrieval of spoken language (memory), and a new test used to evaluate aspects of literacy (reading comprehension and written language production) (Wiig et al. 2013a). © Springer Science+Business Media, LLC, part of Springer Nature 2020 F. R. Volkmar (ed.), Encyclopedia of Autism Spectrum Disorders, https://doi.org/10.1007/978-1-4614-6435-8_102333-1 2 Administration As a result of the flexibility in administration, the average length of administration for the CELF-5 can vary across referral questions and age groups. Administration of the Core Language tests takes approximately 34 min for ages 5:0–8:11 and 42 min for ages 9:0–21:11. Administration of the tests needed to derive the Receptive Language Index takes an additional 16 min on average for ages 5:0–8:11, and 9 min for ages 9:0–21:11. No additional time is required to derive the Expressive Language Index for ages 5:0–8:11, as all required tests for this index are part of the Core Language Score. Additionally, in order to derive the Expressive Language Index, an additional 12 min is needed for ages 9:0–21:11. Overall, in order to administer the Core Language, Receptive Language, and Expressive Language Indexes, administration takes an average of 50 min for ages 5:0–8:11 and 62 min for ages 9:0–21:11. Once the CELF-5 assessment process is complete, clinicians must interpret the results, provide extension testing to test the limits of the student’s performance, and synthesize and report all assessment information (Wiig et al. 2013b). Historical Background The original CELF was published in 1980 by Eleanor Messing Semel. Since its initial publication, the CELF has undergone four revisions. It was originally developed to identify language disabilities, provide diagnostic information, and identify relative strengths and weaknesses in order to establish priorities for treatment and follow-up intervention. The CELF-3, the second revision to the CELF, was frequently used to evaluate individuals who had suffered traumatic brain injuries (TBI) (Semel et al. 1995; Paslawski 2005). In 2003, the CELF-4 (Semel et al. 2003) was published. It was primarily used to screen for and diagnose language disorders in children and young adults aged 5–21. The norms of the CELF-4 were updated based on a diverse standardization using a US sample of 2,650 individuals that reflected the 2000 US census. Of this sample, 39% identified as minorities and 10% CELF-5 reported having a disability (Wiig et al. 2013b). The CELF-4 was designed as a tool for the clinical decision-making process, including making a diagnosis, determining the severity of a language disorder, identifying relative strengths and weaknesses, making recommendations regarding accommodations and intervention, and measuring the efficacy of intervention (Paslawski 2005). Additionally, in 2004, the CELF-Preschool, second edition was developed to (CELF Preschool-2) assesses language ability in children ages 3–6 (Wiig et al. 2004; Paslawski 2005).Similar to the CELF-4, the CELF Preschool-2 was used to identify and diagnose language deficits in children and for the purposes of follow-up. The CELF Preschool-2 has four levels of assessment with respect to language disorders, including identification of a language disorder, description of the disorder, assessing the effect of the disorder on classroom functioning, and pragmatics. The CELF Preschool-2 also overlaps with the CELF-4 for children ages 5 and 6. Psychometric Data Standardization for the CELF-5 occurred in 2012, using a sample of 3,250 English-speaking individuals in the USA between the ages of 5 and 21. Participants were gathered from 47 states (Wiig et al. 2013) and were stratified according to age, race/ethnicity (White, Hispanic, African American, Asian, and Other), geographical region (West, Midwest, Northeast, and South), and parent/caregiver education level (less than a high school diploma, high school diploma, some college or technical school, and 4 or more years of college) (Wiig et al. 2013a). Five percent of participants reported having an attention disorder; 1% a learning disability, intellectual disability, pervasive developmental disorder, Down syndrome, or developmental delay; and less than 1% reported having an emotional disturbance, cerebral palsy, color blindness, central auditory processing disorder, visual impairment, autism, or other diagnoses. Approximately 7% were diagnosed with a speech and/or language disorder, 4% with articulation or phonological disorder, and CELF-5 <1% with fluency/voice disorder (Wiig et al. 2013a). Internal consistency of the CELF-5 was measured using the split-half method with the Spearman–Brown correction formula (Wiig et al. 2013). The average subtest reliability coefficients ranged from acceptable (0.77) to excellent (0.99) for ages 5:0–8:11, while the reliability coefficients for the indexes were excellent and ranged from 0.93 to 0.97. For individuals between the ages of 9:0–21:11, the average subtest reliability coefficients were acceptable (0.60) to excellent (0.99), while the reliability coefficients for the indexes were excellent and ranged from 0.92 to 0.97. Internal consistency was also calculated for individuals from three special populations: language disorders, autism spectrum disorder, and reading and/or writing learning disability (Wiig et al. 2013a). Coefficients for these groups ranged from acceptable (0.75) to excellent (0.99) for the subtests. Index coefficients were not reported (Wiig et al. 2013a). Test–retest stability was obtained via Pearson’s product–moment correlation by administering the CELF-5 twice within a 7–46-day interval to 137 participants (Wiig et al. 2013a). Participants were grouped in three age groups (5:0–6:11, 8:0–9:11, and 12:0–16:11). Results for the 5:0–6:11 age group indicated acceptable (0.68) to excellent (0.92) subtest stability and good (0.84–0.89) composite stability (Wiig et al. 2013a). Similarly, results for the 8:0–9:11 age group indicated adequate (0.77) to good (0.89) subtest stability and good (0.87) to excellent (0.92) composite stability. Lastly, results for the 12:0–16:11 age group indicated poor (0.56) to excellent (0.93) subtest stability and good (0.86) to excellent (0.91) composite stability (Wiig et al. 2013a). The majority of subtests on the CELF-5 are objectively scored (i.e., correct or incorrect), thus they were not analyzed for interrater reliability. However, the following subtests require qualitative judgment for scoring of responses: Word Structure, Formulated Sentences, Word Definitions, and Structured Writing. Overall interrater reliability for these subtests was excellent and 3 ranged from 0.91 (Formulated Sentences) to 0.99 (Word Structure) (Wiig et al. 2013a). Furthermore, good to strong interrelationships among all subtests and composites support the validity of the CELF-5. Intercorrelations ranged from 0.19 to 0.65 for subtests and from 0.72 to 0.97 for composites. Additionally, the relationship among scores on the CELF-5 and other measures of language development informed the measure’s concurrent validity (Wiig et al. 2013a). Correlations between CELF-5 and CELF-4 subtests were adequate (0.64) to good (0.88), whereas correlations between the indexes were good (0.82) to excellent (0.92). Additional comparisons were made with the Peabody Picture Vocabulary Test–Fourth Edition (PPVT-4; Dunn and Dunn 2007) and the Expressive Vocabulary Test–Second Edition (EVT-2; Williams 2007). The PPVT-4 indicated adequate (0.75) to excellent (0.95) correlations with CELF-5 subtests and adequate (0.68) to good (0.80) correlations with CELF-5 indexes. Similarly, comparisons with the EVT-2 indicated adequate (0.71) to excellent (0.98) correlations with CELF-5 subtests and adequate (0.65–0.78) correlations with CELF-5 indexes (Wiig et al. 2013a). Clinical Uses The CELF-5 is a comprehensive assessment that is sensitive to cultural and linguistic diversity and addresses components within the World Health Organization’s International Classification of Functioning, Disability, and Health (2001) (Wiig et al. 2013b). This assessment tool has been developed to aide in the identification of reading and writing difficulties as well as to determine problems with spoken language and the possible impact it may have on a student’s written language. Therefore, the CELF-5 assists clinicians in evaluating a student’s strengths and weaknesses, communicating a student’s needs, addressing parent and teacher concerns, better identifying deficits in social language skills, and identifying the need for an Individualized Education Program (IEP) (Wiig et al. 2013b). 4 Overall, the CELF-5 allows clinicians to evaluate a student’s general language ability and obtain information that aids in determining if a student has a language disorder by administering four to six tests. Once a language disorder has been determined, the assessment process can be extended in order to further investigate areas of strength and weaknesses. Clinicians are able to determine whether significant differences exist between comprehension and expression, identify weaknesses in the areas of morphology and syntax or semantics, identify how the oral language disorder might affect a student’s written language skills, and examine if the identified language disorder affects the student’s social language interactions. See Also ▶ Expressive Vocabulary Test–Second Edition (EVT-2) ▶ Peabody Picture Vocabulary Test–Fourth Edition (PPVT-4) CELF-5 References and Readings Dunn, L. M., & Dunn, D. M. (2007). Peabody picture vocabulary test (4th ed.). Bloomington: NCS Pearson. Paslawski, T. (2005). The clinical evaluation of language fundamentals, fourth edition (CELF-4). Canadian Journal of School Psychology, 20(1–2), 129–134. https://doi.org/10.1177/0829573506295465. Semel, E., Wiig, E., & Secord, W. (1987). Clinical evaluation of language fundamentals (Rev. ed.). San Antonio: The Psychological Corp. Semel, E., Wiig, E., & Secord, W. A. (1995). Clinical evaluation of language fundamentals (3rd ed.). San Antonio: The Psychological Corp. Semel, E., Wiig, E. H., & Secord, W. A. (2003). Clinical evaluation of language fundamentals–fourth edition (CELF-4). San Antonio: NCS Pearson. Turkstra, L. S. (1999). Language testing in adolescents with brain injury. Language, Speech, and Hearing Services in Schools, 30(2), 132–140. https://doi.org/ 10.1044/0161-1461.3002.132. Wiig, E. H., Secord, W. A., & Semel, E. (2004). Clinical evaluation of language fundamentals – Preschool, second edition (CELF Preschool-2). Toronto: The Psychological Corporation/A Harcourt Assessment Company. Wiig, E. H., Semel, E., & Secord, W. A. (2013a). Clinical evaluation of language fundamentals–fifth edition (CELF-5). Journal of Psychoeducational Assessment, 33(5), 495–500. Wiig, E. H., Semel, E., & Secord, W. A. (2013b). Clinical evaluation of language fundamentals–fifth edition (CELF-5). Bloomington: NCS Pearson. Williams, K. T. (2007). Expressive vocabulary test (2nd ed.). Minneapolis: NCS Pearson.