– Q1 LBN vs. LBH: Does the BLITS system without intelligent
support effectively help learners to increase their ability to
write effective English business letters compared to learners
that learn to write English business letters without BLITS (e.g.
by means of word processors)?
– Q2 LBI vs. LBN: Do learners who use the intelligent component
of BLITS write more effective letters with respect to learners
who use the BLITS system without intelligent support?
– Q3 LBI vs. LBH: Do learners who use the intelligent component
of the BLITS system write more effective letters with respect to
learners that learn to write English business letters by hand?