Parameters for Wh-Movement Types: Evidence from Child English
Natural Language & Linguistic Theory
A longitudinal study investigating wh-constructions in children ranging in age at outset from 2:11 to 5:7 indicated that, in addition to accepting English-type wh-movement, some children, for a time, also accept partial wh-movement, wh-coping, & wh-movement constructions that exist in such languages as German & Romani, where a wh-phrase occurs in a [-wh] SpecCP.
McDaniel, Dana; Chiu, Bonnie; and Maxfield, Thomas, "Parameters for Wh-Movement Types: Evidence from Child English" (1995). Faculty Publications. 12.