preferred_name: Min diff in xpressing ideas/needs (may take xtra time, occasional errors in word choice/grammar/speech intelligibility, needs min prompting or assist).
preferred_name_lc: min diff in xpressing ideas/needs (may take xtra time, occasional errors in word choice/grammar/speech intelligibility, needs min prompting or assist).
label: Min diff in xpressing ideas/needs (may take xtra time, occasional errors in word choice/grammar/speech intelligibility, needs min prompting or assist).
label_lc: min diff in xpressing ideas/needs (may take xtra time, occasional errors in word choice/grammar/speech intelligibility, needs min prompting or assist).