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Univ.-Prof. Dr. Dr. Peter Indefrey

Gebäude: 24.53
Etage/Raum: U1.88
+49 211 81-15464


Siehe Aushang Tür 24.53.U1.88.

Peter Indefrey is professor for psycholinguistics and neurolinguistics at Heinrich Heine University Düsseldorf (Germany) and research fellow at the Donders Centre for Cognitive Neuroimaging in Nijmegen.

Some of his favorite research topics are language processing in bilinguals, language production, semantic and syntactic processing, and reading. He studied medicine, psychology, philosophy, and linguistics and received doctoral degrees in medicine (1991) and linguistics (2002).
From 2001-2009 he headed the research projects Dynamics of Multilingual Processing (with Marianne Gullberg) and Neurocognition of Languge (with Peter Hagoort) at the Max Planck Institute for Psycholinguistics.
In 2009 he was awarded a Heisenberg professorship of the Deutsche Forschungsgemeinschaft (DFG).
Since 2011 he is Principal Investigator of two research projects of the DFG Collaborative Research Center (Sonderforschungsbereich) 991 The Structure of Representations in Language, Cognition, and Science.
Since 2013 Peter Indefrey is Managing Director of the Institute for Linguistics and Information Science at Heinrich Heine University Düsseldorf.


Hagoort, P. and Indefrey, P. (2014) The neurobiology of language beyond single words. Annual Review of Neuroscience, 37, 347-362.

Indefrey, P. (2014) Time course of word production does not support a parallel input architecture. Language, Cognition and Neuroscience, 29(1), 33-34.

FitzPatrick, I. and Indefrey, P. (2014) Head start for target language in bilingual listening. Brain Research, 1542, 111-130.

Brenner, D., Indefrey, P., Horn, C., and Kimm, N. (2014) Evidence for four basic noun types from a grammatical, pragmatic and psycholinguistic perspective. In: D. Gerland, C. Horn, A. Latrouite, and A. Ortmann (eds.) Meaning and Grammar of Nouns and Verbs. (pp. 21-48). Düsseldorf University Press, Düsseldorf.

Redmann, A., FitzPatrick, I., Hellwig, F., and Indefrey, P. (2014) The use of conceptual com-ponents in language production: an ERP study. Frontiers in Psychology, 5:363. doi: 103389/fpsyg.2014.00363

Lemhöfer, K. Schriefers, H., and Indefrey, P. (2014) Trust your own errors! The role of subjective syntactic representations in second language comprehension. Journal of Cognitive Neuroscience, 26

Fueller, C., Loescher, J., and Indefrey, P. (2013) Writing superiority in cued recall. Frontiers in Psychology 4:764. doi:10.3389/fpsyg.2013.00764 [Titel anhand dieser DOI in Citavi-Projekt übernehmen] .

Oliver, G., Gullberg, M., Hellwig, F., Mitterer, H., and Indefrey, P. (2012) Acquiring L2 sentence comprehension: A longitudinal study of word monitoring in noise. Bilingualism: Language and Cognition, 15, 841-857.

Indefrey, P. (2012) Hemodynamic studies of syntactic processing. In M. Faust (Ed.), The Handbook of the Neuropsychology of Language. Vol. 1. (pp. 209-228) Malden, MA: Blackwell.Publishing

Davidson, D.J., Hanulikova, A., and Indefrey, P. (2012) Electrophysiological correlates of morphosyntactic integration in German phrasal context. Language and Cognitive Processes, 27, 288-311.

Davidson, D. J. and Indefrey, P. (2011) Error-related activity and correlates of grammatical plasticity. Frontiers in Psychology, 2:219. doi:10.3389/fpsyg.2011.00219 [Titel anhand dieser DOI in Citavi-Projekt übernehmen] .

Hanulová, J., Davidson, D. J., and Indefrey, P. (2011) Where does the delay in L2 picture naming come from? Neurocognitive evidence on second language word production. Language and Cognitive Processes, 26, 902-934.

Indefrey, P. (2011) The spatial and temporal signatures of word production components: A critical update. Frontiers in Psychology  2:255. doi:10.3389/fpsyg.2011.00255 [Titel anhand dieser DOI in Citavi-Projekt übernehmen] .

Indefrey, P. (2011) Neurobiology of syntax. In: Hogan, P.C. (ed.) The Cambridge Encyclopedia of the Language Sciences.(pp. 835-838). Cambridge, New York: Cambridge University Press.

Van de Meerendonk, N.,  Indefrey, P., Chwilla, D.J., and Kolk, H.H.J. (2011) Monitoring in language perception: Electrophysiological and hemodynamic responses to spelling violations. NeuroImage, 54, 2350–2363.

Veroude, K., Norris, D.G., Shumskaya, E., Gullberg, M. and Indefrey, P. (2010) Functional connectivity between brain regions involved in learning words of a new language. Brain & Language, 113, 21-27.

Van der Linden, M., van Turennout, M., and Indefrey, P., (2010) Formation of category representations in superior temporal sulcus. Journal of Cognitive Neuroscience, 22, 1270-1282.

FitzPatrick, I. and Indefrey, P. (2010) Effects of sentence context in L2 natural speech comprehension. Journal of Cognitive Neuroscience, 22, 1165-1178.

Gullberg, M., Roberts, L., Dimroth, C., Veroude, K., and Indefrey, P. (2010) Adult language learning after minimal exposure to an unknown natural language. Language Learning, 60 (Suppl. 2), 5-24.

Gullberg, M. and Indefrey, P. (2010). The earliest stages of language learning. Wiley-Blackwell. Malden, MA.

Davidson, D. J. and Indefrey, P. (2009) An event-related potential study on changes of violation and error responses during morphosyntactic learning. Journal of Cognitive Neuroscience. 21(3), 433-446.

Gullberg, M., Indefrey, P., and Muysken, P. (2009) Research techniques for the study of code-switching. In: Bullock, B.E. and Toribio, A.J. (eds.) The Cambridge Handbook on Linguistic Code-Switching. (pp. 21-39) Cambridge: CUP.

Weber, K. and Indefrey, P. (2009) Syntactic priming in German-English bilinguals during sentence comprehension. Neuroimage 46, 1164-1172.

Davidson, D. J. and Indefrey, P. (2009) Electrophysiological responses to crossed versus nested structures in German learners of Dutch. Language and Cognitive Processes, 24, 1335-1369.

Indefrey, P. and Davidson, D. (2009) Second language acquisition. In: Squire, L. (ed.) Encyclopedia of neuroscience. (pp. 517-523). London: Academic Press.

Kho, K.H., Indefrey, P., Hagoort, P., van Veelen, C.W.M., van Rijen, P.C. and Ramsey, N.F. (2008) Unimpaired sentence comprehension after anterior temporal cortex resection. Neuropsychologia, 46, 1170-1178.

Davidson, D.J., Indefrey, P., and Gullberg, M. (2008) Words that early second language learners are likely to hear, read , and use. Bilingualism: Language and Cognition.

Roberts, L., Gullberg, M., and Indefrey, P. (2008) L2 learners’ real-time resolution of subject pronouns in discourse: An eye-tracking study with advanced Turkish and German L2 learners of Dutch. Studies in Second Language Acquisition, 30, 333-357.

Indefrey, P. and Gullberg, M. (2008) Time to speak: The cognitive and neural prerequisites for time in language. Blackwell Publishing, Malden, MA.

Gullberg, M. and Indefrey, P. (2008) The Cognitive and Neural Prerequisites for Time in Language: Any Answers? Language Learning, 58 (Suppl. 1), 207-216.

Seyfeddinipur, M., Kita, S., and Indefrey, P. (2008) Speakers prefer fluency over accuracy when managing problems in speaking: Evidence from a corpus study of self-repairs. Cognition, 108, 837-842.

Indefrey, P. (2007) Brain imaging studies of language production. In: Gaskell, G. (ed.) Oxford Handbook of Psycholinguistics. (pp. 547-564) Oxford University Press, Oxford.

Joergens, S., Kleiser, R., Indefrey, P. and Seitz, R.J. (2007) Handedness and functional MRI-activation patterns in sentence processing. Neuroreport, 18, 1339-1343.

Davidson, D. J. and Indefrey, P. (2007) An inverse relation between event-related and time–frequency violation responses in sentence processing. Brain Research,1158, 81-92.

Haller, S., Klarhöfer, M., Radue, E.W., Schwarzbach, J., and Indefrey, P. (2007) Temporal analysis of fMRI data on word and sentence reading. European Journal of Neuroscience, 26, 2074-2084.

Indefrey, P. (2006) It’s time to work towards explicit processing models for native and second language speakers [Commentary]. Applied Psycholinguistics, 27, 66-69.

Indefrey, P. (2006) A Meta-Analysis of Hemodynamic Studies on First and Second Language Processing: Which Suggested Differences Can We Trust and What Do They Mean? In: Gullberg, M. and Indefrey, P. (eds.) The Cognitive Neuroscience of Second Language Acquisition. (pp. 279-304) Blackwell Publishing, Malden, MA.

Indefrey, P. (2006) A Meta-Analysis of Hemodynamic Studies on First and Second Language Processing: Which Suggested Differences Can We Trust and What Do They Mean? Language Learning, 56 (Suppl. 1), 279-304.

Indefrey, P. and Gullberg, M. (2006) Introduction. In: Gullberg, M. and Indefrey, P. (eds.) The Cognitive Neuroscience of Second Language Acquisition. (pp. 1-8) Blackwell Publishing, Malden, MA.

Indefrey, P. and Gullberg, M. (2006) Introduction. Language Learning, 56 (Suppl. 1), 1-8.

Gullberg, M. and Indefrey, P. (2006) The Cognitive Neuroscience of Second Language Acquisition. Blackwell Publishing, Malden, MA.

Penke, M., Janssen, U., Indefrey, P., & Seitz, R. (2005) No evidence for a rule/procedural deficit in German patients with Parkinson’s disease. Brain and Language, 95, 139-140.

Sach, M., Seitz, R.J. ,& Indefrey, P. (2004). Unified inflectional processing of regular and irregular verbs: a PET study. Neuroreport, 15, 533-537.

Indefrey, P. and Levelt, W.J.M. (2004) The spatial and temporal signatures of word production components. Cognition, 92, 101-144.

Indefrey, P. (2004) Hirnaktivierungen bei syntaktischer Sprachverarbeitung: eine Meta-Analyse. In: H.M. Müller & G. Rickheit (eds.) Neurokognition der Sprache. (pp. 31-50) Tübingen: Stauffenburg Verlag.

Indefrey, P., Hellwig, F., Herzog, H., Seitz, R. J. & Hagoort, P. (2004) Neural responses to the production and comprehension of syntax in identical utterances. Brain and Language, 89, 312-319.

Vigliocco, G., Vinson, D., Indefrey, P., Levelt, W. J. M., & Hellwig, F. (2004) Role of grammatical gender and semantics in German word production. Journal of Experimental Psychology: Language, Memory, and Cognition. 30, 483-497.

Ischebeck, A., Indefrey, P., Usui, N., Nose, I., Hellwig, F., and Taira, M. (2004) Reading in a regular orthography: An fMRI study investigating the role of visual familiarity. Journal of Cognitive Neuroscience, 16, 727-741.

Indefrey, P. and Cutler, A. (2004) Prelexical and lexical processing in listening. In:

Gazzaniga, M. (ed.) The Cognitive Neurosciences III (pp. 759-774). Cambridge, MA: MIT Press.

Indefrey, P. (2002) Listen und Regeln: Erwerb und Repräsentation der schwachen Substantivdeklination des Deutschen. PhD dissertation: Heinrich Heine University Düsseldorf.

Gruber, O., Indefrey, P., Steinmetz, H., and Kleinschmidt, A. (2001) Dissociating Neural Correlates of Cognitive Components in Mental Calculation. Cerebral Cortex, 11, 350-359.

Indefrey, P., Brown, C. M., Hellwig, F., Amunts, K., Herzog, H., Seitz, R. J., and Hagoort, P. (2001) A neural correlate of syntactic encoding during speech production. Proc. Nat. Acad. Sci. USA, 98, 5933-5936.

Indefrey, P., Hagoort, P., Herzog, H., Seitz, R. J. und Brown, C. M. (2001) Syntactic processing in left prefrontal cortex is independent of lexical meaning. NeuroImage, 14, 546-555.

Indefrey, P. (2001) The neural architecture of language production. In Goekoop, J. G. (Hrsg.) Schrijven en lezen in psychiatrie en psychotherapie. Leiden: Boerhaave Commissie. pp. 7-19.

Indefrey, P. (2001) The neural architecture of  syntactic parsing and encoding. Brain and Language, 79 (1), 106-107.

Indefrey, P. and Levelt, W.J.M. (2000) The neural correlates of language production. In

Gazzaniga, M. (ed.). The New Cognitive Neurosciences ‑ 2nd Edition (pp. 845‑865). Cambridge, MA: MIT Press.

Goebel, R. and Indefrey, P. (2000) A recurrent network with short-term memory capacity learning the German s‑plural. In Broeder, P. and Murre, J.M.J. (eds) Models of Language Acquisition: Inductive and Deductive Approaches (pp. 177-200). Oxford, UK: Oxford University Press.

Levelt, W. J. M. and Indefrey, P. (2000) The Speaking Mind/Brain: Where Do Spoken Words Come From. In: Marantz, A., Miyashita, Y., and O'Neil, W. (eds) Image, Language, Brain. (pp. 77-94) MIT Press, Cambridge, MA.

Hagoort, P., Indefrey, P., Brown, C., Herzog, H., Steinmetz, H., and Seitz, R.J. (1999). The neural circuitry involved in the reading of German words and pseudowords: A PET study. Journal of Cognitive Neuroscience, 11, 383‑398.

Indefrey, P. (1999) Some problems with the lexical status of non‑default inflection [commentary]. Behavioral and Brain Sciences, 22, 1024

Price, C., Indefrey, P., and Van Turennout, M. (1999) The neural architecture underlying the processing of written and spoken word forms. In Brown, C. & Hagoort, P. (eds.) The Neurocognition of Language (pp. 211‑240). Oxford, UK: Oxford University Press.

Indefrey, P. (1998) De neurale architectuur van taal: welke hersengebieden zijn betrokken bij het spreken van woorden? NeuroPraxis, 2, 230‑237.

Hagoort, P. and Indefrey, P. (1997). De neurale architectuur van het menselijk taalvermogen. In Peters, H.F.M. (ed.). Handboek Stem‑, Spraak‑ en Taalpathologie, Vol. 2 (pp. 1‑36). Houten: Bohn, Stafleu, Van Loghum.

Indefrey, P. (1997) PET research in language production. In Hulstijn, W., Peters, H., and Van

Lieshout, P. (eds.) Speech Production: Motor Control, Brain Research and Fluency disorders. (pp. 269‑278). Amsterdam, Elsevier.

Indefrey, P., Kleinschmidt, A., Merboldt, K.‑D., Krüger, G., Brown, C., Hagoort, P., and Frahm, J. (1997). Equivalent responses to lexical and nonlexical visual stimuli in occipital cortex: A functional magnetic resonance imaging study. NeuroImage 5:78‑81.

Seitz, R.J. and Indefrey, P. (1997) Localization of language and memory areas using functional imaging. In Holthausen, H., Ebner, A., and  Tuxon, I. (eds.) Pediatric Epileptic Surgery (pp. 634‑640). London: Libbey.

EU Concerted Action on Functional Imaging: Poline, J.‑B., Vandenberghe, R., Holmes, A.P.,

Friston, K.J., and Frackowiak, R.S.J. (1996). Reproducibility of PET activation studies: Lessons from a multi‑center European experiment. NeuroImage 4, 34‑54

Indefrey, P. (1994). Theoretische Toleranz. Logische und methodologische Bemerkungen zu Peter Tepes "Theorie der Illusionen". In Tepe, P. and Küppers, M. (eds.) Mythologica 2, Düsseldorfer Jahrbuch für interdisziplinäre Mythosforschung (pp.135‑157). Essen: Die blaue Eule

Indefrey, P. and Baayen, H. (1994). Estimating word frequencies from lexical dispersion data. Statistica Neerlandica, 48, 259‑270.

Indefrey, P. and Goebel, R. (1993). The learning of weak noun declension in German: Children vs. artificial network models. Proceedings of the Fifteenth Annual Conference of the Cognitive Science Society (pp.575‑580). Hillsdale,NJ:Lawrence Erlbaum  Associates.

Indefrey, P. (1991) Dimensionen der Einschätzung von Alltagskonzepten auf dem Semantischen Differential bei Morbus Crohn‑Patienten und vergleichbaren Normalpersonen. Medical Dissertation, Heinrich‑Heine‑Universität Düsseldorf

Indefrey, P. (1990) Henning Wode: Einführung in die Psycholinguistik [Review]. Linguistische Berichte, 125, 81‑87

Indefrey, P. (1986) Franz Alexander: Der Mensch als Maschine. in: Zepf, S. (ed.) Tatort Körper ‑ Spurensicherung. Eine Kritik der psychoanalytischen Psychosomatik (pp. 15‑26). Berlin Heidelberg New York Tokyo, Springer

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