Mirror invariance in the subsequent acquisition of a script with separate forms for reading and writing.

Purpose: Does suppression of mirror-invariance in one script generalize to a subsequently learned script?

Method: We examined mirror invariance in writing and recognition among native Latin-scriptal children and adults (n = 181) learning the Hebrew print script (for reading), and among a subset (n = 92) also learning the Hebrew cursive script (for writing). Hebrew-Latin biscriptal Israeli adults (n = 17) provided comparison.

Results: For the most part, mirror invariance was more evident in Hebrew print than in Latin in both writing and recognition among native Latin-scriptals.

A Mechanistic Study of the Association Between Symbolic Approximate Arithmetic Performance and Basic Number Magnitude Processing Based on Task Difficulty.

Two types of number magnitude processing - semantic and spatial - are significantly correlated with children's arithmetic performance. However, it remains unclear whether these abilities are independent predictors of symbolic approximate arithmetic performance. The current study addressed this question by assessing 86 kindergartners (mean age of 5 years and 7 months) on semantic number processing (number comparison task), spatial number processing (number line estimation task), and symbolic approximate arithmetic performance with different levels of difficulty.