LSC primarily uses two of the three planes: horizontal and vertical planes. A 2008 study using LSC demonstrated a universal pattern in the manner in the way signed and spoken language are used to communicate ideas. The experiment took into consideration movement, handshape and location as the three modes of comparison and analysis. In another study, the numeral signs of LSC were analyzed, noting the differing methods of signing numbers above five, which found some differences between LSC and
American Sign Language (ASL) and emphasized how these changes can cause a language to change and evolve. Numbers in Catalan Sign Language are considered more "transparent" than numbers in Spanish and Catalan as the decimal values are made more explicit. As in ASL, verbs are divided into simple, deictic, and spatial-locative verbs. The complexity of signing metaphors in LSC was studied in an experiment involving double-mapping, and the
iconicity in sign languages like LSC and ASL plays a fundamental role for cognitive theories noting the symbiotic relationship between grammar and bodily cognition. Deaf people in Catalonia are taught to read and write oral languages. == LSC Award ==