Wk3Slides
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Wk3Slides
4/12/16 Phonologicalprocessing Atschool,whereeveryteacherwasapoten:alspy,Itriedtoavoidans soundwheneverpossible."Yes,"became"correct,"oramilitary "affirma:ve."…AEerafewweeksofwhatshecalled"endless pestering"andwhatIcalled"repeatedbadgering,"mymotherbought meapocketthesaurus,whichprovidedmewiths-freealterna:vesto justabouteverything.… Pluralspresentedaconsiderableproblem,butIworkedaroundthemas bestIcould;"rivers,"forexample,becameeither"ariverortwo"or "manyariver."Possessiveswereasimilarheadache,anditwaseasierto saynothingthantoannouncethattheleE-handandtheright-hand gloveofJanethadfallentothefloor. --DavidSedaris,MeTalkPre*yOneDay Thisweek Veryearlypercep:on • Moreaboutwhatkidsperceive • Then,backtowhattheyproduce • Alotofinfantlanguageprocessingresearchis allaboutpercep:onbecausetheyaren’t producingmuch. • Bigtake-homethisweek: • PERCEPTIONPRECEDESPRODUCTION. • Someauditorysoundprocessingmaybe“hard wired”butalotofitislearned. X Lisker&Abramson,1964 Voiced Voiceless √ X Voiced Voiceless ** ** ** -20020406080 VOT(ms) Englishspeakerscandis:nguishsynthesizedb/psoundsdifferingonlyinVOT,if testedusing20and40msec. Buttheycan’t(orperformpoorly)iftestedusing0and20or40and60. -20020406080 VOT(ms) Categoricalpercep9on:listenersaremuchbecerat discrimina:ngbetweencategoriesthanwithincategories. 1 4/12/16 Howdoinfantsperceivespeechsounds? Propertyofauditorysystem[s]topickuponthisboundary Eimasetal.:1-and4-month-olds;habitua:onprocedure. VOT: +20/+40 (ba/pa) 0/+20, +60/+80 Control (ba…ba…ba…ba…) √ X Soundcontrasts • YOUNGinfantscandis:nguishmostsoundsin mostlanguages • Consonants,vowels • Tone:veryunclearpicture • Olderstudies:“useitorloseit”—refinedownto yourlanguage’scategories • Newerstudies:somecategoriesgetsharperover :me(ortheydon’tevenshowupun:lchildren havealotoflisteningexperience) language-specificrefinement:vowels chinchilla macaque J.quail Basicauditoryability language-specificrefinement Werker&Tees1984:testdiscrimina:onofHindidental andretroflex/t/,anddiscrimina:onofNthlakampxvelar anduvularconsonants[k’]and[q’],usingCHT. velar uvular Canadianbabies: discriminatedat6-8months onlysomedidat8-10months almostnoneat10-12months Infantsgetworseatdiscrimina;ngsoundsthat aren’tcontras;veintheirlanguage. language-specificrefinement:vowels similarresults,perhapsevenearlierdevelopment CatalanandSpanish Polka&Werker1994,usingvisualhabitua:onprocedure Catalan:has/e/and/E/(like“bait”and“bet”) Spanish:justsomethinginbetween,near/e/ German/u/vs/y/ 1 4monthsdiscriminate 6monthsdon’t 12monthsdon’t Bosch&Sebas:an-Gallés,usinghabitua:onprocedure: all4.5montholdsdiscriminate/e/and/E/; Catalan8.0montholdsdiscriminatethemtoo; Spanish8.0montholdsdon’tANDbilingualsdon’t; Bilingualsdiscriminateagain,by12months. 2 4/12/16 Produc:onfollowspercep:on Percep:ontakessome:me • Somesoundboundariesyou’rebornwith(VOT dis:nc:on),orlearnveryfast • Othersaremorelanguage-variableandmayrequire morelearning • Verylikelythatchildrencanperceivecontrastsbefore theycanproducethem • Perceptually,kidscandis:nguishallsortsofsoundsearly on • Graduallynarrowdowntoownlanguage • Simultaneouslylearningwords(Bergelson&Swingley,2011) – Dis:nguishingallsoundsmaynotbegood-- – Needsomesimilaritytobuildon – Maybeknowinglotsofwordshelpsyounarrowdownthe soundsinyourlanguage • Knowingindividualsoundsisn’tthesameas knowingwhichonesgotogetherinwords • Learningwordsaslabelsforthingsmaymake percep:onharder • Produc:onoflanguage-specificsoundstakesmuch longer – Needsmotorprac:cetogetmotorcontrol Percep:ontakessome:me • Boundariesyou’rebornwithorlearnvery fast(VOTdis:nc:on) • Learningcategoryboundaries • Learningwhichsoundsgotogether • Learningwordsaslabels – Thisisthepointofitall,isn’tit? – Similarwordsarehardtolearntotellapart Keepingtrackofsounddistribu:ons Maye,Werker,&Gerken(2002) Categoryboundaries ✔ • Infantslearncategoriesbykeepingtrackof sounddistribu:ons – Maye,Werker,&Gerken,2002 • Adultskeeptrackofsounddistribu:onstoo – Newman,Clouse,Burnham2001 Keepingtrackofsounddistribu:ons Newman,Clouse&Burnham(2001) • Twodistribu:onsorone distribu:onofspeechsounds – Made-updis:nc:on • Incidentalexposuretooneor other -20 • Playtwosoundsfromsame/ differentdistribu:ons • Infants,6&8months • (Adultscandotoo) • Two-lumps:different! • One-lump:notdifferent! 0 20 40 60 80 Speech dimension STOPconsonantvoiceonset;me: Lisker&Abramson,1964 • Frica:ves(s,sh,f,th, z,v,dth)showthese distribu:onsaswell • Somecontextual varia:on 3 4/12/16 What ARE they thinking? (A Q&D tutorial on infant methods) Percep:ontakessome:me • Boundariesyou’rebornwithorlearnvery fast(VOTdis:nc:on) • Learningcategoryboundaries ✔ • Learningwhichsoundsgotogether • Learningwordsaslabels Headturn Preference Procedure: What seems interesting? ✔ – Thisisthepointofitall,isn’tit? – Similarwordsarehardtolearn 1. 2. trial starts with green light once baby’s ready, flash one side light 3. when baby turns to light, start playing sounds from speaker 4. when baby turns away, stop sounds and start new trial dependent measure: listening time to a given kind of auditory material Soundsthatgotogether • Saffranetal.(1996) • Jusczyk&Johnson(2001) • Nonadjacentdependencies Cuestowordboundaries • Strong-ini:alvs.weak-ini:alwords – Strong:BUTter,CANdle,PUPpy,SAUsage – Weak:baNAna,caBOOSE,reCLINE,aGREE • Cutlerandcolleagues:“metricalsegmenta:on strategy”(MSS) – Strongsyllableisthestartofaword Cuestowordboundaries • Stress – English:mostnounsarestress-ini:al – ThePREcyBAbyWANTSaBOTtle Cuestowordboundaries • Jusczyk,Houston&Newsome – 7.5.Months: • Familiarizeinfantswithstress-ini:alwords – Kingdom,hamlet • Playpassageswithkingdom,hamlet(ordoctor,candle) • Infantslistenlongertokingdom/hamletpassages:they recognizethewords 4 4/12/16 Cuestowordboundaries • Jusczyk,Houston&Newsome – 7.5.Months: • Stress-ini:alOK Cuestowordboundaries • Jusczyk,Houston&Newsome – 7.5months: • Stress-ini:al✔ • Stressnotini:al✘ Cuestowordboundaries • Jusczyk,Houston&Newsome – 7.5months: • Stress-ini:al(kingdom)✔ • Stressnotini:al(guitar)✘ • Stressedsyllable(tar)✔ Cuestowordboundaries • Jusczyk,Houston&Newsome – 7.5.Months: • Stress-ini:alOK • Familiarizewithguitar,surprise • Testwithguitar,surprise,balloon,device • Nodifferenceinlooking:mes Cuestowordboundaries • Jusczyk,Houston&Newsome – 7.5months: • Stress-ini:al✔ • Stressnotini:al✘ • Familiarizewithtar,prize,loon,vice • Playguitar/surprise--getit Cuestowordboundaries • Jusczyk,Houston&Newsome – 7.5months: • Stress-ini:al(kingdom)✔ • Stressnotini:al(guitar)✘ • Stressedsyllable(tar)✔ – 10.5months: • Stressnotini:al(guitar)✔ 5 4/12/16 But… • Notalllanguageshavethiskindofstress pacern. • Lookacheprecybaby • Howdoyouknowwhattheproper;esof wordsareifyoudon’tknowwhatthewords are? • Lookacheprecybaby • Whereisthebabynowprecygirl • Thisliclebabyisprecygood • Lookacheprecybaby • Whereisthebabynowprecygirl • Thisliclebabyisprecygood • LookachepreRybaby • WhereisthebabynowpreRygirl • ThisliclebabyispreRygood • LookachepreRybaby • WhereisthebabynowpreRygirl • ThisliclebabyispreRygood • Given“ty”,what’slikelytocomenext? 6 4/12/16 Let’sdosomemath… • LookachepreRybaby • WhereisthebabynowpreRygirl • ThisliclebabyispreRygood • Given“ty”,what’slikelytocomenext? • Whataboutgiven“ba”? Sta:s:callearning • Saffran,Aslin&Newport(1996) – 8-month-oldinfants • • • • pago:numabékolifudé panumalifubékogo:dé palifunumago:békodé … • Given“pa”,what’slikelytocomenext? • Whataboutgiven“go”or“:”? Sta:s:callearning • Saffran,Aslin&Newport(1996) – 8-month-oldinfants golabubidakutupiropado:tupirobidakupado:gol abupado:bidakugolabutupiro golabupado:tupirobidakupado:bidakutupirog olabupado:bidakugolabutupiro… golabubidakutupiropado:tupirobidakupado:gol abupado:bidakugolabutupiro golabupado:tupirobidakupado:bidakutupirog olabupado:bidakugolabutupiro… Sta:s:callearning Sta:s:callearning • Saffran,Aslin&Newport(1996) – 8-month-oldinfants golabubidakutupiropado:tupirobidakupado:gol abupado:bidakugolabutupiro golabupado:tupirobidakupado:bidakutupirog olabupado:bidakugolabutupiro… • Saffran,Aslin&Newport(1996) – 8-month-oldinfants golabubidakutupiropado:tupirobidakupado:gol abupado:bidakugolabutupiro golabupado:tupirobidakupado:bidakutupirog olabupado:bidakugolabutupiro… 7 4/12/16 Sta:s:callearning • Playfor2minutes • Presentkidswithbidakuorpiro.bitypewords • Whatdotheylistentolonger? bidaku<piro.bi Butwhataboutstress? • Johnson&Jusczyk(2001) – 8-month-olds – Stressvs.sta:s:cs:Stresswins – (noveltypreference) • At8monthsinfantscansegmentwordsbased onsta9s9calcues Butwhataboutstress? • Johnson&Jusczyk(2001) – 8-month-olds – Stressvs.sta:s:cs:Stresswins Butwhataboutstress? • Johnson&Jusczyk(2001) – 8-month-olds – Stressvs.sta:s:cs:Stresswins • Thiessen&Saffran(2003) • Thiessen&Saffran(2003) – Sta:s:cswins@7mos – Stresswins@9mos – Sta:s:cswins@7mos – Stresswins@9mos • Segmenta9onprecedesstress. Sta:s:callearning • What’sge}nglearned? – Frequency:XYhappensalot • Butthedog,thegirl>hassock,:pple – Condi9onalprobability • GivenX,Yis__likelytohappen • Predic9veness • Aslin,Saffran&Newport(1996) Sta:s:callearning • What’sge}nglearned? – Aslin,Saffran&Newport(1996) • golabu/pado:2xasoEenastupiro/bidaku • Sodo:.goisasfrequentasbidaku(45xeach) • But 1.0 1.0 bi->da->ku 1.0 .33 do->:->go 8 4/12/16 Sta:s:callearning • What’sge}nglearned? Sta:s:callearning • Infantsareindeedlearningcondi:onal probabili:es,notjustfrequency. – Aslin,Saffran&Newport(1996) • golabu/pado:2xasoEenastupiro/bidaku • Sodo:.goisasfrequentasbidaku(45xeach)3minof listening;thentest Frequency: = 1.0 1.0 bi->da->ku 1.0 .33 do->:->go Condi:onal probability: < Languagespecificity? • • • • Worksforlanguage Worksfortonesequences(C-C#-G…) Worksforvisualsequences(n✚★u…) Maybetamarinmonkeysdoit(Hauseretal.) • Notjustalanguage-specificphenomenon. Perceivingsoundsvs. learningwords Percep:ontakessome:me • Boundariesyou’rebornwithorlearnvery fast(VOTdis:nc:on) • Learningcategoryboundaries✔ • Learningwhichsoundsgotogether✔ • Learningwordsaslabels ✔ – Thisisthepointofitall,isn’tit? – Similarwordsarehardtolearn Stager & Werker, 1997 “Switch”procedure(fancydishabitua:on) • Speechsounds: – Startouthearingeverything, – Narrowinonna:velanguageby12months. • Words: – Producebadlyat12months, – Butpresumablythementalrepresenta:onsofthe soundsthemselvesareaccurate. – Ormaybenot… “dih” “bih” Test: “dih” 14 mos: no dishabituation! Dumbed-down: one object 8 mos: ✔ 14 mos: ✘ 14 mos: lif vs. neem ✔ 9 4/12/16 Stager&Werker1997 Stager & Werker, 1997 “Switch”procedure(fancydishabitua:on) • AHerlearningspeechsounds,14-month-olds seemnottouse! • S&W:maybeforwordlearning,kidsdon’tuse detail • Swingley&Aslin:maybetheyjusthavepoor representa:onsof“bih”and“dih”--what aboutrealwords? “dih” “bih” WHY?? Perceptual regression? Divided attention? Unfamiliarity of words? one simple word recognition task: picture fixation Swingley & Aslin, 2000, 2002 Where's the ball? "Correct" Where's the gall? "Mispron." Bypreschool(age3-5years),childrenflexiblyinterpret mispronuncia:ons.* 100% 100% 80% 60% 40% 20% 0% 80% “Ball” “Gall” 60% 40% 20% 0% <- 50% = can’t tell Creel,2012, DevelopmentalScience Accuracy "Fish" "Fesh" "Feesh" Feed Seethe Feed Seethe the the Novelobject Fish Fesh Target 100% 400 450 500 550 600 650 700 750 Creel,Rojo,&Paullada,2016 Age (days) Accuracy 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 1 Accuracy proportion to target" (ball) Target fixation given correct pronunciation and mispron., plotted by child’s age 80% 60% 40% 20% 0% correct pronunciations mispronunciations Novel *Unlessthereisasimilarwordaround! Target …runny nose …runny pumpkin USaccent …runny nose …runny pumpkin MXaccent 10 4/12/16 Percep:ontakessome:me • Boundariesyou’rebornwithorlearnvery fast(VOTdis:nc:on)✔ • Learningcategoryboundaries✔ • Learningwhichsoundsgotogether✔ • Learningwordsaslabels✔ – Newwords:weakerrepresenta:ons – Overthelongterm:goodrepresenta:ons – Maybechildrenarestoringspecificwordsandnot somuchsequencesofspeechsounds Atschool,whereeveryteacherwasapoten:alspy,Itriedtoavoidans soundwheneverpossible."Yes,"became"correct,"oramilitary "affirma:ve."…AEerafewweeksofwhatshecalled"endless pestering"andwhatIcalled"repeatedbadgering,"mymotherbought meapocketthesaurus,whichprovidedmewiths-freealterna:vesto justabouteverything.… Pluralspresentedaconsiderableproblem,butIworkedaroundthemas bestIcould;"rivers,"forexample,becameeither"ariverortwo"or "manyariver."Possessiveswereasimilarheadache,anditwaseasierto saynothingthantoannouncethattheleE-handandtheright-hand gloveofJanethadfallentothefloor. --DavidSedaris,MeTalkPre*yOneDay Onthe‘output’side… • Soundskidsmake: • Pre-6months:mostlyvowels,somebackconsonants (velars) • Later(canonicalbabblingstarts):widerrangeof placesofar:cula:on – Regardlessoflanguage,kidsseemtobemakingvery similarsounds(un:laliclewhilebeforewordsappear) – Consonantsaremostly:ptkbdgmnwjsh(Locke‘83) • Kidsbuildonthesetosayfirstwords Babblingtowords • Istherealink?Yes! • Kidswhoprefercertainbabblingpacernsendup withthosepacerns – Vocalmotorschemes(Vihman1996) – Canvoluntarilyproducematchingwords • Babblingfrequencypredicts#&accuracyofwords producedat2-3years • Lateinprespeech,starttodropoutsoundsthat aren’tinchild’slanguage,andadoptrhythmsof na:velanguage Firstwords • Some:resembleadultwordsinsoundandsocial context(hi,byebye,peekaboo) • Others:madeupbykidbutusedforpar:cular func:on--protowords – Controlsvocalapparatus?✓ – Knowswordshavespecificmeanings?✓ – Knowsthatyouhavetofigureoutthewordsthat everyoneelseuses?✗ – (Somevariabilityinform) ExamnextThursday • Bringapen,pencilandbrain • Format:mul:partques:ons – Someveryshortanswerparts. – Somesentence-to-paragraph-sizeanswers • REVIEWSESSION – TBA 11 4/12/16 Acquiringyourlanguage’ssound system • Notsimpleaddingonofperfectly-pronounced words. • Some:mespronuncia:onschangeforthe becerorworse. • Soundscanshowuponsomewords,butnot others. Acquiringyourlanguage’ssound system • • • • Regression:soundsget“worse”(Menn71) Down&stone:/dæwn//don/oralVnasal Later,neworalVnasalwords: Beans&dance:/minz/&/næns/ – nasalassimila:on • “Tookover”moreaccurateformsofdownand stone,whichbecame/næwn/&/non/ Acquiringyourlanguage’ssound system Acquiringyourlanguage’ssound system • Progressivephonologicalidiom:somewordsare accurate“tooearly” • No/h/exceptonhiandhello • Others:‘orse,‘ose,‘amster… • Sohasheacquired/h/ornot? • Howtoaccountforregression?Thinkofchildasproblemsolving(Ferguson&Macken‘83):HowdoIsoundlikethe peoplearoundme? • Temporarysolu:ons: – – – – – Avoidanceofhardsounds/sequences(Sedaris’s) Exploita:onofsoundsyoulike Replacementofonesoundwithanother(/wɛw/) Rearrangementofsoundsinword(/pəskɛ:/) Oneword,orapproximatewholephrase(Peters,1977) • Thesesolu:onspervademuchofcogni:veandlanguage development Acquiringyourlanguage’ssound system • Varia;onofthesestrategies – Acrosslanguages – Acrosschildren – Tendencies,notabsolutes Acquiringyourlanguage’ssound system • Otherinfluencesthataren’tstrategic • Biologicalconstraints – Forinstance:stops[physically]easierthanfrica:ves • Perceptualfeedback – Can’tdomuchifyoudon’thaveanacous;cmodelfromadultsand internalfeedback – E.g.ifyou’rehearing-impaired,lessinternalfeedback,thoughcanalso getexternalfeedback • Internalfeedback=immediate • Externalfeedback=delayed,reliesonotherperson – Internalrewardforsoundinglikethosearoundyou 12 4/12/16 Normalprogression • Age3:vowelsandmanyconsonants – Toughconsonants:r,l,v,th,dth • Shouldbeintelligibleby4 – Not?Possiblyatypicaldevelopment • Byage8:mostlyadultlikesounds – Butslowerspeechrate – Morevariablepronuncia:on,:ming Describingkids’pronuncia:ons • Waystodescribe: – Rulestotranslateadultformintokidform • E.g.“delete/s/inclusters” – Describekid’slimita:onsintermsofconstraints (e.g.“noclusters”) – Preferredformsastemplates(CVC) • Makesenseofseemingly-unrelatederrors Describingkids’pronuncia:ons • Caveat:whatwehearisfilteredthroughourown phonologicalsystem! • Fine-grainedanalyses(Macken&Barton‘80) – Maybewecan’thearadis:nc:onthey’reacemp:ngto make • Needformul:plemeasurementsofsameword@ givenage – Kidsgraduallyaddin,correctsounds – Phaseswherenewformcoexistswitholdone Describingkids’pronuncia:ons • Thingsthataretough – Clusters – Coda(endofsyllable)consonants Inherentvariability • Cau:oninmispronuncia:on:kidsmayhave referen;alvs.expressivestyle – Sayonewordperfectly(referen:al) – Sayapproxima:onofwholesentence(expressive) • Hardtotranscribe! • Regionalvariantsinpronuncia:on – Definecorrectnessbydialectbeingacquired • Variantsincontexts:readinglistvs.casual conversa:on Describingkids’pronuncia:ons • Thingsthataretough – Clusters – Coda(endofsyllable)consonants Relatedly,somelanguages don’thavethese! Alsonotfoundinbabbling 13 4/12/16 Describingkids’pronuncia:ons • Thingsthataretough – – – – Clusters Coda(endofsyllable)consonants Longwords Ini:alweaksyllables Relatedly,somelanguages don’thavethese! Alsonotfoundinbabbling Describingkids’pronuncia:ons • Thingsthataretough – – – – Relatedly,somelanguages don’thavethese! Alsonotfoundinbabbling Clusters Coda(endofsyllable)consonants Longwords Ini:alweaksyllables • Varioussolu:ons… – – – – Describingkids’pronuncia:ons • Wordstress • Weak-ini:alwordsarehard – Tomato“mato” – Surprise“prize” – Dessert“zert” Omit/s/ Omitother Assim.place Describingkids’pronuncia:ons • Assimila;on • Changingonethingtomatchanother • Happensinadultspeechtoo – Greenpeas-->/grimpiz/ • Withkids,moreextreme • Notjustwordlength – Blanket“banket” – Puppy“puppy” Wordtemplates • AKA“canonicalforms”Vihman&CroE,2007 • Between5-100words,mostarevariantsonafew templates,plusafewisolatedphonologicalidioms • Similaradultwordsthatareperformedbychildfrom sametemplate – Fish dish vest – ɪʃ dɪʃ ʊʃ – Pacern:(C)Vʃ Sock Spock School String brush fetch byʃ ɪʃ • Ruleschangeadultwordstofittemplate – Well-->/wɛw/ – Cat,dog,pug-->/tæt//gɑg//kʌg/ – Mump,means,nance-->nasalfeaturespreadsbackward Howmuchofthisisnot understanding? • Verylicle. • Afewadultsoundsareconfusable(f,ɵ) – Butnotthatmany • Goodatdiscrimina:ngcontrastsofna:velanguage – (Withafewexcep:ons) • Evenforweakstress,canhearsyllables – Gerken&McIntosh(1993) • Findwasdogforme(confusion!) • Findthedogforme(noconfusion) 14