“…Therefore, the final learner group included 338 participants. Learners were assigned to four categories according to the values of the null subject parameter (NSP) as established in the current generative literature (e.g., Roberts & Holmberg, 2010), with two important differences (which we will explain below): (a) consistent prodrop languages—such as Italian, Greek, Turkish, and Arabic—are those that feature null subjects in all persons and tenses; (b) partial prodrop languages license null subjects only in some persons of the verb, for example, Finnish and Brazilian Portuguese third subject pronouns cannot be null, whereas third impersonal pronouns can be null; (c) discourse (radical) pro-drop languages—such as Chinese, Japanese, and Korean—allow non-expression of both pronominal subjects and objects and lack verb morphology; (iv) non-prodrop languages are languages—such as English, German, French, and Icelandic—in which pronominal subjects are expressed by pronouns in subject position that are normally if not obligatorily present (Dryer, 2013, see Duguine, 2017 for discussion).…”