Liljagare

What I always thought interesting is that sign language differs from country to country..the differences are actually more vast then dialect differences (say between British and American English..a person who uses American Sign language would not neccesarily be able to understand a person who uses British Sign language even though the spoken language is close enough to understand with few problems..a person from France is more likely to understand a person from Ireland rather than a person from England even though the spoken languages differ for another example).

Vygotsky (Vygotskij) is actually an interesting one to study when it comes to relations between language and thought if you are interested in that tract.