“…In spite of analysing sign language phonology on the feature level since the late 1980's (Sandler, 1989), and evidence that speaking children acquire features or even clusters of features rather than phonemes (Jakobson, 1968;Smith, 1973; for more recent overviews see Fikkert, 2007;Dresher, 2004), research on the acquisition of sign phonology predominately examines the three parameters handshape, movement, and location (Boyes-Braem, 1990;Cheek et al, 2001;Clibbens & Harris, 1993;Conlin, Mirus, Mauk & Meier, 2000;Karnopp, 2002;Lavoie & Villeneuve, 2000;Marentette & Mayberry, 2000;McIntire, 1977;Meier, 2006;Meier, Mauk, Cheek & Moreland, 2008;Morgan, Barrett-Jones & Stoneham, 2007;Siedlecki & Bonvillian, 1993;Takkinen, 1 For the purpose of this study, we use the term 'feature' to refer to the articulatory dimensions borrowed from Global Signbank, and more broadly, from the Dependency Model, e.g., 'handshape dominant hand', 'location' or 'movement direction'. Manifestations of these features such as circular or straight for 'movement shape' are referred to as feature values.…”