This is the case of an eight year old boy with problems in his reading and writing skills; after a deficient learning process in the mentioned skills as well as lack of attention, he is reinforced in the reading skill focusing the word.

The Time Series Theory is applied to check the effectiveness of the treatment according to Box-Jenkins approach. The applicability of the case is also analysed. The model which represents the series is built up an the intervention effect is checked by mean of Glass, Willson and Gottman approach (1975).