Researchers of the University of St. Gallen and the SCCRE are investigating the influence that highly gifted children have on their classmates. The influence is mostly positive, large but very heterogeneous. Girls and weaker pupils tend to benefit less from the presence of highly gifted children in class.
Simone Balestra, Aurélien Sallin and Stefan C. Wolter (2020). High-Ability Influencers? The Heterogeneous Effects of Gifted Classmates
Leading House Working Paper No. 170