te Nijenhuis, J., Al-Shahomee, A. A., van den Hoek, M., Allik, J., Grigoriev, A., & Dragt, J. (2015).
Spearman's hypothesis tested comparing Libyan secondary school children with various other groups of secondary school children on the items of the Standard Progressive Matrices.
Intelligence,
50, 118-124.
https://doi.org/10.1016/j.intell.2015.03.002