Abstract
Biting force and Digit span tests were measured in 56 kindergarten children aged from 5 years 5 months to 6 years 5 months and in 98 junior high school students aged from 12 years 1 month to 15 years 1 month. The kindergarten children were given chewing training during the 6 months which was preceded and followed by biting force measurements and Digit span tests. The following were obtained:
1. Significant positive correlations were observed between the biting force and forward recall and backword recall test scores in kindergarten children.
2. The mean biting force and forward recall and backword recall test scores increased significantly after chewing training. Furthermore, there was a larger number of children whose forward recall test scores increased after chewing training.
3. Significant positive correlations were observed between biting force and forward recall test scores in junior high school students.
