Table 1 Absolute difference and ratios of the quantities used in the experiments.

From: Representational format determines numerical competence in monkeys

Difference 0 1 2 3 4
Combinations 1:1 2:1 (2.0) 3:1 (3.0) 4:1 (4.0) 5:1 (5.0)
  2:2 3:2 (1.5) 4:2 (2.0) 5:2 (2.5) 6:2 (3.0)
  3:3 4:3 (1.33) 5:3 (1.67) 6:3 (2.0) 7:3 (2.33)
  4:4 5:4 (1.25) 6:4 (1.5) 7:4 (1.75) 8:4 (2.0)
  1. Difference refers to the absolute difference between the two amounts of items used in the test. Equal amounts (difference=0) served as control condition. The numerical ratios (larger divided by smaller quantity) are given in parentheses.