“…For spoken languages, linguistic encoding of spatial terms has been found to follow a certain developmental order reflecting the cognitive complexity of the spatial relations reviewed above (1.1.1.). For instance, speaking children first acquire terms such as In-On-Under to refer to viewpoint-independent spatial relations between objects (e.g., Casasola, 2008;Casasola et al, 2003;Clark, 1973;Johnston & Slobin, 1979), followed by viewpoint-dependent relations such as Front-Behind (Durkin, 1980(Durkin, , 1981Grigoroglou et al, 2019;Johnston & Slobin, 1979;Piaget & Inhelder, 1971). Linguistic encoding of viewpoint-dependent Left-Right relations, however, appears later (Abarbanell & Li, 2021;Benton, 1959;Harris, 1972;Piaget, 1972;Rigal, 1994Rigal, , 1996Sümer, 2015).…”