The present investigation has as aim compare the different psychological processes of the reading between the students of two shifts of the second degree of primary education of Pachacútec's educational state institution. There were selected a sample of 33 children and girls of the shift tomorrow and 27 children and girls of the shift late of a socioeconomic low level to which there was applied the Battery of Evaluation of the Reading Processes (PROLEC) elaborated for F. Cuetos , B. Rodríguez and E. Ruano (2000). A profile of performance was elaborated in each of the processes of the reading. To find the differences of the performance of the pupils of the shift tomorrow opposite to those of the shift late there was in use the statistician Or of Mann Whitney. One found a better performance in all the processes of the reading in the pupils of the shift tomorrow opposite to those of the s...