Test for the Diagnosis of Mathematical Competences

Detecting Children With Arithmetic Disabilities From Kindergarten: Evidence From a 3-Year Longitudinal Study on the Role of Preparatory Arithmetic Abilities

“…The psychometric value was demonstrated on a sample of 550 Dutch speaking Belgian children from the second year of kindergarten to the third grade of primary school. The TEDI-MATH has proven to be a well validated 2007a & b) and reliable instrument, values for Cronbach's Alpha for the different subtests vary between .70 and .97 (Grégoire et al, 2004). The predictive value has been established in a longitudinal study of 82 children from kindergarten till grade (Desoete & Grégoire, 2007) and on 240 children assessed in grade 1, 2 or 3 with TEDI-MATH and reassessed two years later with arithmetic tasks (Desoete, 2007).…”

“…All preparatory arithmetic abilities were tested with different subtests of the TEst for the DIagnosis of Mathematical Competences (TEDI-MATH; Grégoire, Noel, & Van Nieuwenhoven, 2004). The TEDI-MATH is an individual assessment battery that was constructed in order to detect arithmetic disabilities.…”

Language in the prediction of arithmetics in kindergarten and grade 1

“…Logical thinking abilities were tested as with seriation and classification subtests of the Tedi-Math (Grégoire et al, 2004) at T1. Children had to seriate numbers (e.g., 'Sort the cards from the one with the fewest trees to the one with the most trees').…”

“…Conceptual knowledge of counting was assessed with subtest 2 of the TediMath (Grégoire et al, 2004) at T1. Children were asked 'How many objects are there in total?'…”

“…Procedural knowledge of counting was assessed with subtest 1 of the TediMath (Grégoire et al, 2004) at T1, using accuracy in counting numbers, counting forward to an upper bound (e.g., 'count up to 6'), counting forward from a lower bound (e.g., 'count from 3'), counting forward with an upper and lower bound (e.g., 'count form 5 up to 9') as indication for the procedural counting knowledge. The internal consistency of this task was good (Cronbach's Alpha = .73).…”