Fig 3. Mean performance (and .05 confidence intervals) of “younger” 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 = 0.75 + 9.88x; r² = .99). For the English children, performance is well explained by the combination of a linear and a quadratic trend (y = -14.59 + 24.02x -1.39x²; r² = .99).