Variabilidad en la comprensión gramatical en el envejecimiento normal

Descriptive results showed that the number of correct responses in the task decreases as the age increase, and also that the sentences with two propositions were the most difficult ones for the subjects. The regression analysis of age over the variability measures -absolute standarized residuals of the original indexes- showed that: (1) there was an linear increment of diversity in the first three types of sentences as age increases; and (2) the variability increases until 65-66 years in the most difficult sentences (two propositions - noncanonical order), but decreases from that point, fitting to a cuadratic function with an inverted Ushape. The implications of these results are discussed with respect to other studies on sentence comprehension in normal aging.