Fig. 1. Individual differences and distributions for the six tests included in our novel gamified battery of spatial orientation set in a virtual environment.

All variables were residualized for age and sex, and standardized in one randomly selected half of the sample (only one twin within each pair was randomly selected for descriptive and phenotypic analyses in order to account for the non-independence of observations); full descriptive statistics for both randomly selected halves of the sample are presented in Supplementary Table 1. The black dots represent means and the error bars standard deviations. SC scanning, PT perspective taking, NL navigation landmarks, ND navigation directions (cardinal points), RM route memory, MR map reading.