The purpose of this study was to explore the influence of age differentials on item difficulty and discrimination indices of West African School Certificate (WAEC) English Language Objective test for May/June 2014 taken by students in Nigeria. The study area was the southern Education Zone of Cross River State. The design used for the study was ex-post facto, justified by the fact that the variable of the study had occurred before being studied and that no manipulation of subjects of study was involved. The 2014 May/June English objective test items were used as they were. The instrument (made up of all the fifty items of the test) was administered to a sample of 100 students selected through accidental sampling procedure. Results of the study indicate that item response to the test depended, among other things, on the age brackets of the students. The older students seem to respond more correctly to items than their younger counterparts. The study recommends more proactive steps in admission of age compliant candidates for terminal examinations in Secondary Schools.