As part of an experiment on the normalization of the Kaufman Assessmen
t Battery for Children, the present study stresses the relationship of
reading comprehension to decoding as well as to the battery's other a
ptitudes in 216 first and secondgraders in Lausanne primary schools. C
hildren had to read to themselves and execute orders given in sentence
s of progressive complexity. An analysis of variance shows a strong gr
ade effect. A multiple regression analysis confirms the close link bet
ween understanding and decoding and, moreover, shows that written comp
rehension also depends on oral language factors. A qualitative analysi
s tracks the progression of the comprehension of written sentences acc
ording to their grammatical complexity.