Four chronologically different groups of students -- two from a private secondary school and two from the University - were administered a spatial analogy test and a coding test. The results point to marked superiority in performance by the younger groups, especially on the spatial analogy test. The relationships between the two tests range from low negative for the youngest group to positively significant for the oldest group. The relationships between the two tests when the scori's were combined for the two younger groups and for the two older groups, do not differ significantly from each other, but that for the older group is again positively significant. The total results of the tests have implications for a theory that intellectual functioning declines as age increases.