No feedback was given to correct responses.
by item analysis, passives were rated less grammatical than canonical variants for simple sentences (t(23) = 3.07, p < 0.01), less grammatical than both canonical and ba variants for sentences with RCs (t(23) = 5.68, p < 0.001; t(23) = 2.27, p < 0.05), and less grammatical than canonical variants for sentences with adjunct RCs (t(23) = 4.92, p < 0.001).