GRS LX 700 Language Acquisition and Linguistic Theory Two
Total Page:16
File Type:pdf, Size:1020Kb
GRS LX 700 Two hypotheses about learning Language Acquisition and Linguistic Theory • LLEE (late learning early emergence) —A “commonsense” view— Things which “emerge” emerge early. Things which are learned appear later. Week 5. Optional infinitives, Unique Checking Constraint, ATOM, … Implies that parameters should be set late too (since at least the settings are learned) Two hypotheses about learning Two-word stage? • VEPS (very early parameter setting) Basic parameters are set correctly at the earliest • The reason both VEPS and VEKI mention observable stages, that is, at least from the time the two-word stage is just because this is the that the child enters the two-word stage around 18 first stage where we have evidence of months of age. utterance composition. • VEKI (very early knowledge of inflection) At the earliest observable stage (two-word stage), the child knows the grammatical and phonological properties of many important inflectional elements of their language. Optional Infinitive stage Optional Infinitive Stage • Root infinitives are possible grammatical • German: V2/SOV; kids put finite verbs in sentences; second position, leave nonfinite verbs in • These infinitives co-exist with finite forms; clause-final position • The children know the relevant grammatical principles (and how they distinguish finite • French: V-->I; kids move finite verbs to I, from nonfinite). leave nonfinite verbs in VP. Very Early Parameter Setting VEPS and the theory of learning • As soon as you can see it, kids have: • If parameters are set by the time kids are – VO vs. OV order set (Swedish vs. German) using multi-word utterance, no negative – V-->I [yes/no] (French vs. English) evidence could have played a role. – V2 [yes/no ] (German vs. French/English) – Null subject [yes/no] (Italian vs. Fr./E.) • So, at least by the 2-word stage, they have the parameters set (maybe earlier) Null subjects… Topic drop • Null subject parameter is not initially mis-set (kids • Where kids drop the subject of a finite verb, don’t all start off speaking Italian—contra Hyams perhaps this is “Topic-drop” 1986); rather, child null subjects are (at least in part) due to the availability of non-finite verbs (the OI stage). • Proposal: • Some null subjects are licensed by being the Topic-drop applies to Very Strong Topics subject of a nonfinite verb (i.e. PRO) • But there are some null subjects with finite Kids sometimes take (in reality) non-VS verbs… topics to be VS topics (a pragmatic error) Bromberg, Wexler, wh-questions, Prediction about NS and null subjects • OI’s have two ways of licensing NSs: • If topic drop is something which drops a – PRO (regular licensing of null subject) topic in SpecCP… – Topic drop • …and if wh-words also move to SpecCP… • Finite verbs have one way to license a NS: • …we would not expect null subjects with – Topic drop non-subject (e.g., where) wh-questions where the verb is finite (so PRO is not • So: We expect more null subjects with root licensed) infinitives (which we in fact see) Bromberg, Wexler, wh-questions, *Truncation and null subjects • And, that’s what they found: • Rizzi’s “truncation” theory predicts: • No wh-questions with root infinitives Finiteness of null and pronominal subjects in Adam’s – wh-question ⇒ CP, but wh-questions (Bromberg & Wexler 1995) – CP ⇒ IP, and Finite Nonfinite – IP ⇒ finite verb Null 2 118 • And of course we wouldn’t expect null subjects in wh-questions if null subjects are Pronoun 117 131 allowed (only) in the specifier of the root. But… *LLEE • German and Dutch have extremely few root • So: despite expectations of early infinitives when there is anything in SpecCP. practitioners of P&P: VEPS means *LLEE. • What then do we make of the fact that kids • But they are V2 languages—finite verbs are what make non-adult utterances in the face of you find in C, and when SpecCP is filled, there must be something in C. Hence, the prediction evidence that they aren’t learning the seems to be: parameters? • KW: Certain (very specific, it turns out) • V2 languages ⇒ no wh-question root infinitives properties of the grammar mature. VEKI? ATOM • Generally, when kids use inflection, they use it • Adult clause structure: correctly. Mismatches are vanishingly rare. AgrP – English (Harris & Wexler 1995) – German (Poeppel & Wexler 1993) ′ NOMi Agr • Again, this is kind of contrary to what the field Agr TP had been assuming (which was: kids are slow at, ′ bad at, learning inflection). ti T TVP ATOM ATOM • Kiddie clause, missing TP (—TNS): • Kiddie clause, missing AgrP (—AGR): AgrP ′ NOMi Agr Agr TP ⇒ ′ ACC defaulti T VP TVP Why either missing TP or AgrP One prediction of ATOM gives us a root infinitive (DM) • In English, we have the following rules for • +AGR +TNS: NOM with inflected verb (-s) pronouncing this tense/agreement affix: • +AGR –TNS: NOM with bare verb • –AGR +TNS: default (ACC) with bare verb • (V+)T is pronounced like: • –AGR –TNS: GEN with bare verb /s/ if we have features [3, sg, present] (not discussed but see Schütze & Wexler 1996) /ed/ if we have the feature [past] Ø otherwise • Nothing predicts ACC with inflected verb. EPP and missing INFL *Truncation again • Prior to splitting into AgrSP and TP, the • Incidentally, Rizzi’s “truncation” theory has hypothesis was that IP was missing and that the same problem—if root infinitives are IP was responsible for both NOM and tense. missing everything above tense, how come • Yet, there are many cases of root infinitives so many bare forms surface with NOM with NOM subjects (atom:+Agr –Tns) subjects? And why do the subjects raise past • And, even ACC subjects seem to raise out negation, and to where? Topic?! Bah. of the VP over negation (me not go) Wait—how can you say kids are Wait—how can you say kids are UG-constrained yet drop T/Agr? UG-constrained yet drop T/Agr? • So, aren’t TP and AgrSP required by UG? • Perhaps what requires TP and AgrP are principles Doesn’t this mean kids don’t have UG- of interpretation… • You need TP so that your sentence is “anchored” compliant trees? in the discourse. • Actually, perhaps no. UG requires that all • You need AgrSP … why? Well, perhaps features be checked, but it isn’t clear that something parallel…? there is a UG principle that requires a TP • Regardless, kids can check all the uninterpretable and an AgrP in every clause. features even without TP or AgrSP; hence, they can still be considered to be UG-constrained. NS/OI NS/OI • Some languages appear not to undergo the • What differentiates the OI and non-OI languages? “optional infinitive” stage. How can this be • Agreement? Italian (non-OI) has rich agreement, consistent with a maturational view? but so does Icelandic (OI). – OI languages: Germanic languages studied to • Null subjects! date (Danish, Dutch, English, Faroese, Icelandic, Norwegian, Swedish), Irish, Russian, • Null Subject/OI Generalization: Brazilian Portuguese, Czech Children in a language go through an OI stage iff – Non-OI languages: Italian, Spanish, Catalan, the language is not an INFL-licensed null subject Tamil, Polish language. NS/OI and Hebrew NS/OI and Hebrew (Rhee & Wexler 1995) (Rhee & Wexler 1995) • Hebrew is a NS language but only in 1st and 2nd person, non-present tense. kids up to 1;11 1/2 past/fut (NS) else (non-NS) Everywhere else (3rd past, future, present) null subjects 0 (of 21) 32% (36/112) subjects are obligatory. overt subjects 0 (of 6) 0 (of 28) • Hebrew-learning 2-year-olds showed optional infinitives except in 1/2-past, and all OI kids 1/2 past/fut (NS) else (non-NS) allowed null subjects elsewhere, with null subjects 0.6% (1/171) 25% (85/337) infinitives. overt subjects 1.4% (1/72) 0.6% (3/530) The UCC “Minimize Violations” • Unique Checking Constraint • The poor kid with the UCC is faced with a The D-feature of a DP can only check dilemma. It knows that it must obey three against one functional category things, but it can obey only any two: – Realize tense • Adults must check the D feature of the – Realize agreement subject both in TP and in AgrSP. Kids only – Unique checking constraint get one, so they have to choose: Omit TP, • So, the kid chooses which one to violate Omit AgrSP, or ignore the UCC. (satisfying two) for any given utterance. Speculations about D-features NS/OI via UCC • In adult syntax a DP must check its D- • An old idea about NS languages is that they feature against both AgrSP and TP. arise in languages where Infl is “rich” • AgrSP and TP each have a D-feature of a enough to identify the subject. special sort—the kind that deletes when it is • Maybe in NS languages, AgrS does not checked (an uninterpretable feature) need a D (it may in some sense be nouny • Might the UCC be a consequence of kids enough to say that it is, or already has, D). mistakenly taking the D-feature of DP to be • If AgrS does not need a D, the subject is uninterpretable? free to check off T’s D-feature and be done. Is there any way to see the effects Or maybe in Korean negation… of UCC even in NS languages? • Italian: Mary has laughed. • Short Form Negation in Korean: • Suppose that auxiliaries (like have) also Chelswu-ka pap-ul an-mek-ess-ta. have a D-feature to be checked as the Chelswu-nom rice-acc neg-eat-past-decl subject (in the adult language) passes ‘Chelswu didn’t eat rice.’ through. UCC-constrained kids will have to drop something (the auxiliary or T) • Common OI-age kid error: • Lyons (1997) reports that a “substantial proportion of auxiliaries are omitted in OI- na an pap mek-e age Italian.” I neg rice eat-decl ‘I don’t eat rice.’ Negation errors in child Korean Negation errors in child Korean • Generalization about child errors with SFN: • Can this error be made to follow from the UCC VP-internal material is privileged in its ability to (you can’t check a D-feature twice)? occur between an and the verb in child errors.