Bočková V, Pavlovičová G, Rybanský Ľubomír. Identification of Problematic Items and Analysis of Distractors of the van Hiele Geometry Test. International Journal of Instruction [Internet]. 2026 Jan. 1 [cited 2026 Jan. 8];19(1):401-18. Available from: https://e-iji.net/ats/index.php/pub/article/view/865