That these languages do not show Complex NP and Adjunct island effects is well-known and it has been proposed that it can be explained if what is moved is the the whole island containing the WH-phrase, not the WH-phrase inside the island (Choe 1987;Nichigauchi 1986Nichigauchi , 1992Kishimoto 1992;Yoon 1999, etc.).
wH-in-situ languages like Korean, Japanese and Sinhala could be taken as languages where both the direct and indirect wH-feature checking movement are covert.