"One could get superior mathematical abilities by acquiring the skill of Abacus-Based Mental Calculation (AMC), which can be used to solve calculation problems with exceptional speed and high accuracy" (Huang, 2015)
Mental abacus training can be associated with an improved ability to store visuo-spatial information. (Chen, 2011)
“These findings demonstrate that enriched experiences (e.g. mental abacus training) may improve basic cognitive capacities and possess utility for learning and education” (Chen, 2011)
“Abacus experts utilize visuo-spatial representations of digit sequences during digit span memory tasks and this strategy increases their digit span memory capacity” (Tanaka, 2002)
Knowing two ways (conventional and abacus) to represent arithmetic concepts gives a child a more abstract and flexible understanding of numbers, in the same way that knowing two languages leads to higher levels of metalinguistic knowledge. (Stigler, University of Chicago, 1986)
“Abacus skill has statistically significant correlations with grades in mathematics and reading” (Stigler, University of Chicago, 1986).
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Huang, Jian, Feng-lei Du, Yuan Yao, Qun Wan, Xiao-song Wang, Fei-yan Chen. "Numerical magnitude processing in abacus-trained children with superior mathematical ability: an EEG study." Journal of Zhejiang University SCIENCE B 16.8 (2015): 661-71. Web.
Kim, Teng Siang. The Modality Factor in Two Approaches of Abacus-based Calculation and its Effects on Mental Arithmetic and School Mathematics Achievements. Thesis. Universiti Sains Malaysia, 2007. Web.
Stigler, James W., Laurence Chalip, and Kevin F. Miller. "Consequences of Skill: The Case of Abacus Training in Taiwan." American Journal of Education 94.4 (1986): 447-79. JSTOR. Web.
Tanaka, Satoshi, Chikashi Michimata, Tatsuro Kaminaga, Manabu Honda, and Norihiro Sadato. "Superior Digit Memory of Abacus Experts: An Event-related Functional MRI Study." NeuroReport 13.17 (2002): 2187-191. Web.
Tanaka, Satoshi, Keiko Seki, Takashi Hanakawa, Madoka Harada, Sho K. Sugawara, Norihiro Sadato, Katsumi Watanabe, and Manabu Honda. "Abacus in the Brain: A Longitudinal Functional MRI Study of a Skilled Abacus User with a Right Hemispheric Lesion." Frontiers in Psychology 315th ser. 3 (2012): Web.
Wu, Tung-Hsin, Chia-Lin Chen, Yung-Hui Huang, Ren-Shyan Liu, Jen-Chuen Hsieh, and Jason J. S. Lee. "Effects of Long-term Practice and Task Complexity on Brain Activities When Performing Abacus-based Mental Calculations: A PET Study." European Journal of Nuclear Medicine and Molecular Imaging 36 (2009): 436-45. Web.