Fig 4. Mean performance (and .05 confidence intervals) of “older” children on the lexical learning task as a function of trial sequence.

Data are separately presented for Italian and English participants. Interpolation is based on significant trends. For the Italian children, a linear regression well explains the data (y = 6.95 + 10.67x; r² = .99). For English children, performance is well explained by the combination of a linear and a quadratic trend (y = -14.15 + 33.07x -2.82x²; r² = .99).