This study investigated the relations between age at injury (AAI) and atten
tional functioning, and intellectual and academic achievement following ped
iatric head injury. The theoretical framework of attention proposed by Mirs
ky, Anthony, Duncan, Ahern, and Kellam (1991) provided the basis for this a
nalysis, and the profile of attention found in uninjured children was evalu
ated for this sample. Thirty-three moderately head-injured individuals were
recruited, with AAI ranging from 1 to 12 years. First, the development of
attentional skills in this closed head injury (CHI) sample was found to be
comparable to that of Mirsky et al.'s model. Second, AAI did not predict ou
tcome and appeared not to be associated with the finding of mildly delayed
acquisition of spelling and arithmetic skills. Also, AAI did not predict th
e behavioral symptoms of inattention present in this sample as indicated by
parental report. It may be that AAI only influences development following
severe CHI in which there is permanent cerebral pathology.