The 4 types of mobility are identified based on physical and psychological movement, which highlights the importance of a “boundaryless mind-set”. (
Canfuwyd pedwar math o symudedd, ar sail symudiad corfforol a seicolegol, sy’n tynnu sylw at bwysigrwydd “meddylfryd di-ffiniau” (Atodiad 2 – Darlun o Bedwar Math o Symudedd, Caluwé 2014).