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Ereigniskorrelierte Potenziale (EKPs)

  • Heiner Drenhaus and Peter beim Graben
Published/Copyright: January 1, 2012

Abstract

In this article we give a short introduction to the online method of event-related (brain) potentials (ERPs) and their importance for our understanding of language structure and grammar. This methodology places high demands on (technical) requirements for laboratory equipment as well as on the skills of the investigator. However, the high costs are relatively balanced compared to the advantages of this experimental method. By using ERPs, it becomes possible to monitor the electrophysiological brain activity associated with speech processing in real time (millisecond by millisecond) and to draw conclusions on human language processing and the human parser.

First, we present briefly how this method works and how ERPs can be classified (Section 1 and 2). In the following, we show that the ERP method can be used to study the processing of e. g. semantic, pragmatic and syntactic information (Section 3). Crucial for our discussion will be the interpretation of the so-called ERP components and their connection and importance for psycholinguistics and theoretical linguistics. In our presentation, we emphasize, that the electrophysiological brain activity in relation to specific (e. g. linguistic) stimuli can be used to identify distinct processes, which give a deeper insight into the different processing steps of language. At the end of this article (Section 4), we present some results from ERP studies of German negative-polar elements. Additionally, we highlight the advantage and benefits of an alternative method to analyze ERP data compared to the more ‘classical’ average technique.

Danksagung

Wir möchten uns bei den anonymen Gutachtern für Anregungen und Verbesserungshinweise bedanken. Ebenso möchten wir Judith Köhne für Hinweise und Diskussion danken, als auch Stefan Frisch für seine Hilfe, Unterstützung und Diskussion in der „NEG-POL Zeit“.

Literatur

Bastiaansen, M., & Hagoort, P. (2006). Oscillatory neuronal dynamics during language comprehension. Progress in brain research, 159(06), 179–196.10.1016/S0079-6123(06)59012-0Search in Google Scholar

Bates, D., & Sarkar, D. (2007). lme4: Linear mixed-effects models using S4 classes. R package version 0.9975-11.Search in Google Scholar

Baayen, R. H. (2008). Analyzing linguistic data: A practical introduction to statistics using R. Cambridge University Press.10.1017/CBO9780511801686Search in Google Scholar

Berger, H. (1929). Über das Elektrenkephalogramm des Menschen. European Archives of Psychiatry and Clinical Neuroscience, 87(1), 527–570.Search in Google Scholar

van Berkum, J. J. A., Brown, C. M., & Hagoort, P. (1999). Early Referential Context Effects in Sentence Processing: Evidence from Event-Related Brain. Potentials. Journal of Memory and Language, 182, 147–182.10.1006/jmla.1999.2641Search in Google Scholar

van Berkum, J. J. A., Brown, C. M., & Hagoort, P. (2003). Event-related brain potentials reflect discourse- referential ambiguity in spoken language comprehension. Society, 40, 235–248.Search in Google Scholar

Bornkessel, I., Schlesewsky, M., & Friederici, A. D. (2003). Contextual information modulates initial processes of syntactic integration: The role of inter-versus intrasentential predictions. Journal of Experimental Psychology: Learning, Memory, and Cognition, 29(5), 871–882.Search in Google Scholar

Coles, M. G. H., & Rugg, M. D. (1995). Event-related brain potentials: an introduction. In M. D. Rugg & M. G. H. Coles (Eds.), Electrophysiology of mind: Event-related potentials and cognition, New York: Oxford University Press, 1–26.Search in Google Scholar

Coulson, S., King, J. W., & Kutas, M. (1998). Expect the unexpected: Event-related brain response to morphosyntactic violations. Language and cognitive processes, 13(1), 21–58.10.1080/016909698386582Search in Google Scholar

Cowles, H. W. (2003). Processing information structure: Evidence from comprehension and production. University of California, San Diego.Search in Google Scholar

Cowles, H. W., Kluender, R., Kutas, M., & Polinsky, M. (2007). Violations of information structure: an electrophysiological study of answers to wh-questions. Brain and language, 102(3), 228–242.10.1016/j.bandl.2007.04.004Search in Google Scholar

Donchin, E. (1981). Surprise!… surprise?. Psychophysiology, 18(5), 493–513.10.1111/j.1469-8986.1981.tb01815.xSearch in Google Scholar

Donchin, E., & Coles, M. G. (1988). Is the P300 component a manifestation of context updating?. Behavioral and Brain Sciences, 11(3), 357–427.10.1017/S0140525X00058027Search in Google Scholar

Donchin, E., Ritter, W., McCallum, W. C., & others. (1978). Cognitive psychophysiology: The endogenous components of the ERP. Event-related brain potentials in man, 349–411.10.1016/B978-0-12-155150-6.50019-5Search in Google Scholar

Drenhaus, H., beim Graben, P., Saddy, D., & Frisch, S. (2006). Diagnosis and Repair of Negative Polarity Constructions in the Light of Symbolic Resonance Analysis. Brain and Language, 255–268.10.1016/j.bandl.2005.05.001Search in Google Scholar

Drenhaus, H., Saddy, D., & Frisch, S. (2005). Processing Negative Polarity Items: When Negation Comes Through the Backdoor. In S. Kepser, & M. Reis (Eds.), Linguistic Evidence: Empirical, Theoretical, and Computational Perspectives. Berlin: Mouton de Gruyter (Studies in Generative Grammar 85), 145–165.10.1515/9783110197549.145Search in Google Scholar

Drenhaus, H., Zimmermann, M., & Vasishth, S. (2011). Exhaustiveness effects in clefts are not truth-functional. Journal of Neurolinguistics, 24(3), 320–337.10.1016/j.jneuroling.2010.10.004Search in Google Scholar

Fischler, P. A., Bloom, Childers, D. G., Roucos, S. E., & Perry, N. W. (1983). Brain potentials related to stages of sentence verification. Psychophysiology, 20, 400–409.10.1111/j.1469-8986.1983.tb00920.xSearch in Google Scholar

Frazier, L. (1987). Theories of sentence processing. Modularity in knowledge representation and natural-language understanding, 291–307. MIT Press Cambridge, MA.Search in Google Scholar

Frazier, L. & Clifton, C. (1996). Construal. The MIT Press.Search in Google Scholar

Friederici, A D., Mecklinger, A, Spencer, K. M., Steinhauer, K., & Donchin, E. (2001). Syntactic parsing preferences and their on-line revisions: a spatio-temporal analysis of event-related brain potentials. Brain research. Cognitive brain research, 11(2), 305–323.10.1016/S0926-6410(00)00065-3Search in Google Scholar

Friederici, A D., Steinhauer, K., Mecklinger, A., & Meyer, M. (1998). Working memory constraints on syntactic ambiguity resolution as revealed by electrical brain responses. Biological psychology, 47(3), 193–221.10.1016/S0301-0511(97)00033-1Search in Google Scholar

Friederici, A. D. (1995). The time course of syntactic activation during language processing: A model based on neuropsychological and neurophysiological data. Brain and Language, 50, 259–281.10.1006/brln.1995.1048Search in Google Scholar

Friederici, A. D. (1998). The neurobiology of language comprehension. Language comprehension: A biological perspective, Springer, 263–301.10.1007/978-3-642-97734-3_9Search in Google Scholar

Friederici, A. D. (2002). Towards a neural basis of auditory sentence processing. Trends in Cognitive Sciences, 6(2), 78–84.10.1016/S1364-6613(00)01839-8Search in Google Scholar

Friederici, A. D., Hahne, A., & Saddy, D. (2002). Distinct neurophysiological patterns reflecting aspects of syntactic complexity and syntactic repair. Journal of psycholinguistic research, 31(1), 45–63.10.1023/A:1014376204525Search in Google Scholar

Frisch, S., & beim Graben, P. (2005). Finding needles in haystacks: Symbolic resonance analysis of event-related potentials unveils different processing demands. Cognitive brain research, 24(3), 476–491.10.1016/j.cogbrainres.2005.03.004Search in Google Scholar

Frisch, S., Schlesewsky, M., Saddy, D., & Alpermann, A. (2002). The P600 as an indicator of syntactic ambiguity. Cognition, 85(3), 83–92.10.1016/S0010-0277(02)00126-9Search in Google Scholar

George, M. S., Kutas, M, Martinez, A., & Sereno, M. I. (1999). Semantic integration in reading: engagement of the right hemisphere during discourse processing. Brain: a journal of neurology, 122(7), 1317–1325.Search in Google Scholar

George, M. S., Mannes, S., & Hoffman, J. E. (1994). Global semantic expectancy and language comprehension. Journal of Cognitive Neuroscience, 6(1), 70–83.10.1162/jocn.1994.6.1.70Search in Google Scholar

George, M. S., Mannes, S., & Hoffman, J. E. (1997). Individual Differences in Inference Generation: An ERP Analysis. Journal of Cognitive Neuroscience, 9(6), 776–787.10.1162/jocn.1997.9.6.776Search in Google Scholar

beim Graben, P., Drenhaus, H., & Gerth, S. (2012). Computationelle Neurolinguistik. Germanistische Linguistik, (in diesem Band).10.1515/zgl-2012-0006Search in Google Scholar

beim Graben, P., Drenhaus, H., Brehm, E., Rhode, B., Saddy, D., & Frisch, S. (2007). Enhancing dominant modes in nonstationary time series by means of the symbolic resonance analysis. Chaos, 17(4): 43106.Search in Google Scholar

beim Graben, P., Frisch, S., Fink, A., Saddy, D., & Kurths, J. (2005). Topographic voltage and coherence mapping of brain potentials by means of the symbolic resonance analysis. Physical Review, 72(5): 51916.Search in Google Scholar

beim Graben, P., Saddy, J. D., Schlesewsky, M., & Kurths, J. (2000). Symbolic dynamics of event-related brain potentials. Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 62(4), 5518–5541.10.1103/PhysRevE.62.5518Search in Google Scholar

Gries, S. (2012). Modelierung. Germanistische Linguistik, (in diesem Band).Search in Google Scholar

Gunter, T. C., Friederici, A. D., & Hahne, A. (1999). Brain responses during sentence reading: Visual input affects central processes. NeuroReport, 10(15), 3175–3178.10.1097/00001756-199910190-00009Search in Google Scholar

Gunter, T. C., Stowe, L. A., & Mulder, G. (1997). When syntax meets semantics. Psychophysiology, 34(6), 660–676.10.1111/j.1469-8986.1997.tb02142.xSearch in Google Scholar

Hagoort, P., & Brown, C. M. (2000). ERP effects of listening to speech compared to reading: The P600/SPS to syntactic violations in spoken sentences and rapid serial visual presentation. Neuropsychologia, 38(11), 1531–1549.10.1016/S0028-3932(00)00053-1Search in Google Scholar

Hagoort, P., Hald, L., Bastiaansen, M., & Petersson, K. M. (2004). Integration of word meaning and world knowledge in language comprehension. Science, 304(5669), 438–441.Search in Google Scholar

Hahne, A. (1998). Charakteristika syntaktischer und semantischer Prozesse bei der auditiven Sprachverarbeitung: Evidenz aus ereigniskorrelierten Potentialstudien. Max-Planck-Institut of Cognitive Neuroscience.Search in Google Scholar

Helmholtz, H. (1853). Ueber einige Gesetze der Vertheilung elektrischer Ströme in körperlichen Leitern mit Anwendung auf die thierisch-elektrischen Versuche. Annalen der Physik, 165(6), Wiley Online Library, 211–233.10.1002/andp.18531650603Search in Google Scholar

Herrmann, C. S. Grigutsch, M., & Busch N. A. (2005). EEG oscillations and wavelet analysis In T. Handy (Ed.) Event-related potentials: a methods handbook. Cambridge: MIT Press, ­229–­259.Search in Google Scholar

van Herten, M, Kolk, H., & Chwilla, D. (2005). An ERP study of P600 effects elicited by semantic anomalies. Cognitive Brain Research, 22(2), 241–255.10.1016/j.cogbrainres.2004.09.002Search in Google Scholar

Hink S., A., & Robert, F. (1978). Event-related brain potentials and selective attention to acoustic and phonetic cues. Biological Psychology, 6(1), 1–16.10.1016/0301-0511(78)90002-9Search in Google Scholar

Horn, L. (1989). A Natural History of Negation. Chicago: CSLI.Search in Google Scholar

Horn, L. (1997). Negative polarity and the dynamics of vertical inference. In D. Forget, P. Hirschbühler, F. Martinon, & M.-L. Rivero (Eds.), Negation and Polarity: Syntax and Semantics. Amsterdam: John Benjamins,157–182.10.1075/cilt.155.09horSearch in Google Scholar

Jung, T. P., Makeig, S., Westerfield, M., Townsend, J., Courchesne, E., & Sejnowski, T. J. (2000). Removal of eye activity artifacts from visual event-related potentials in normal and clinical subjects. Clinical Neurophysiology, 111(10), 1745–1758.10.1016/S1388-2457(00)00386-2Search in Google Scholar

Kaan, E., Harris, A., Gibson, E., & Holcomb, P. (2000). The P600 as an index of syntactic integration dif culty. Integration The Vlsi Journal, 15(2), 159–201.Search in Google Scholar

King, J. W., & Kutas, M. (1995). Who Did What and When? Using Word- and Clause-Level ERPs to Monitor Working Memory Usage in Reading. Journal of Cognitive Neuroscience, 7(3), 376–­395.10.1162/jocn.1995.7.3.376Search in Google Scholar

Klima, E. (1964). Negation in English. In J. A. Fodor & J. Katz (Eds.), The Structure of Language, Prentice Hall, Englewood Cliffs, New Jersey, 246–323.Search in Google Scholar

Kluender, R., & Kutas, M. (1993). Bridging the Gap: Evidence from ERPs on the Processing of Unbounded Dependencies. Journal of Cognitive Neuroscience, 5(2), 196–214.10.1162/jocn.1993.5.2.196Search in Google Scholar

Kolk, H., Chwilla, D., van Herten, M., & Oor, P. J. (2003). Structure and limited capacity in verbal working memory: A study with event-related potentials. Brain and Language, 85(1), 1–36.10.1016/S0093-934X(02)00548-5Search in Google Scholar

Kounios, J., & Holcomb, P. J. (1992). Structure and process in semantic memory: Evidence from event-related brain potentials and reaction times. Journal of Experimental Psychology: General, 121(4), 459.10.1037/0096-3445.121.4.459Search in Google Scholar

Krifka, M. (1992). Some remarks on polarity items. In D. Zaefferer (Ed.), Semantic Universals and Universal Semantics. Berlin: Foris, 150–189.Search in Google Scholar

Krifka, M. (1995). The semantics and pragmatics of polarity items. Linguistic Analysis, 25, 209–­257.Search in Google Scholar

Kutas, M., & Donchin, E. (1978). Variations in the latency of P300 as a function of variations in semantic categorizations. Multidisciplinary perspectives in event-related brain potential research, 600, 9–77.Search in Google Scholar

Kutas, M., & Federmeier, K. (2000). Electrophysiology reveals semantic memory use in language comprehension. Trends in cognitive sciences, 4(12), 463–470.10.1016/S1364-6613(00)01560-6Search in Google Scholar

Kutas, M., & Hillyard, S. A. (1980a). Event-related brain potentials to semantically inappropriate and surprisingly large words. Biological Psychology, 11(2), 99–116.10.1016/0301-0511(80)90046-0Search in Google Scholar

Kutas, M., & Hillyard, S. A. (1983). Event-related brain potentials to grammatical errors and semantic anomalies. Memory and cognition, 11(5), 539–550.10.3758/BF03196991Search in Google Scholar

Kutas, M., & Petten, C. K. V. (1994). Psycholinguistics electrified: Event-related brain potential investigations. In M. A. Gernsbacher (Ed.), Handbook of Psycholinguistics. San Diego: Academic Press,83–143.Search in Google Scholar

Kutas, M., Lindamood, T. E., & Hillyard, S. A. (1984). Word expectancy and event-related potentials during sentence processing. In S. Kornblum & J. Requin (Eds.), Preparatory Studies and Processes. Hillsdale (NJ): Erlbaum, 217–237.Search in Google Scholar

Kutas, M., Van Petten, C., & Kluender, R. (2006). Psycholinguistics electrified II: 1994–2005. Handbook of psycholinguistics (2nd ed.), Elsevier Press, New York, 659–724.10.1016/B978-012369374-7/50018-3Search in Google Scholar

Kutas, M., & Hillyard, S. A. (1980b). Reading senseless sentences: Brain potentials reflect semantic incongruity. Science, 207, 203–205.10.1126/science.7350657Search in Google Scholar

Kutas, M., & Federmeier, K. D. (2009). Thirty Years and Counting: Finding Meaning in the N400 Component of the Event-Related Brain Potential (ERP). Annual review of psychology, 62, 621–64710.1146/annurev.psych.093008.131123Search in Google Scholar

Ladusaw, W. (1980). Polarity Sensitivity as Inherent Scope Relations. New York & London: Garland.Search in Google Scholar

Linebarger, M. (1987). Negative polarity and grammatical representation. Linguistics and Philosophy, 10, 325–387.10.1007/BF00584131Search in Google Scholar

Luck, S. J. (2004). Ten Simple Rules for Designing and Interpreting ERP Experiments. In T. C. Handy (Ed.), Event-Related Potentials: A Methods Handbook. Cambridge, MA: MIT Press, 17–32.Search in Google Scholar

Luck, S. J. (2005). An introduction to the event-related potential technique. MIT-Press, 17–32.Search in Google Scholar

Makeig, S., Jung, T. P., Bell, A. J., Ghahremani, D., & Sejnowski, T. J. (1997). Blind separation of auditory event-related brain responses into independent components. Proceedings of the National Academy of Sciences, 94(20), 10979. 10.1073/pnas.94.20.10979Search in Google Scholar

Makeig, S.; Debener, S.; Onton, J. & Delorme, A. (2004). Mining event-related brain dynamics. Trends in Cognitve Science, 8, 204–210.10.1016/j.tics.2004.03.008Search in Google Scholar

Mecklinger, A., Schriefers, H., Steinhauer, K., & Friederici, A. D. (1995). Processing relative clauses varying on syntactic and semantic dimensions: An analysis with event-related potentials. Memory and Cognition, 23, 477–494.10.3758/BF03197249Search in Google Scholar

Münte, T. F., Matzke, M., & Johannes, S. (1997). Brain activity associated with syntactic incongruencies in words and pseudo-words. Journal of Cognitive Neuroscience, 9(3), ­318–­329.10.1162/jocn.1997.9.3.318Search in Google Scholar

Niebeling, H. G. (1980). Einführung in die Elektroenzephalographie. Springer-Verlag.10.1007/978-3-642-67548-5Search in Google Scholar

Nieuwland, M. S., & van Berkum, J. J. A. (2006). When peanuts fall in love: N400 evidence for the power of discourse. Journal of Cognitive Neuroscience, 18(7), 1098–1111.10.1162/jocn.2006.18.7.1098Search in Google Scholar

Osterhout, L., & Holcomb, P. J. (1992). Event-related brain potentials elicited by syntactic anomaly. Journal of Memory and Language, 31, 785–806.10.1016/0749-596X(92)90039-ZSearch in Google Scholar

Osterhout, L., & Holcomb, P. J. (1995). Event-Related Potentials and Language Comprehension. In M. Rugg &M. Coles (Eds.), Electrophysiological studies of human cognitive function. Oxford: Oxford University Press, 171–215.Search in Google Scholar

Osterhout, L., McKinnon, R., Bersick, M., & Corey, V. (1996). On the language specificity of the brain response to syntactic anomalies: Is the syntactic positive shift a member of the P300 family? Journal of Cognitive Neuroscience, 8(6), 507–526.10.1162/jocn.1996.8.6.507Search in Google Scholar

Osterhout, L., Mclaughlin, J., Kim, A., & Greenwald, R. (2004). Sentences in the Brain: Event-Related Potentials as Real-Time Reflections of Sentence Comprehension and Language Learning. Language, 271–308.Search in Google Scholar

Picton, T W, Bentin, S., Berg, P., Donchin, E., Hillyard, S. A., Johnson, R., Miller, G. a, et al. (2000). Guidelines for using human event-related potentials to study cognition: recording standards and publication criteria. Psychophysiology, 37(2), 127–152.10.1111/1469-8986.3720127Search in Google Scholar

Polich, J. (2007). Updating P300: an integrative theory of P3a and P3b. Clinical neurophysiology: official journal of the International Federation of Clinical Neurophysiology, 118(10), ­2128–­2148.Search in Google Scholar

Quiroga, R. Q., & Garcia, H. (2003). Single-trial event-related potentials with wavelet denoising. Clinical Neurophysiology, 114, 376–390.10.1016/S1388-2457(02)00365-6Search in Google Scholar

Roehm, D., Schlesewsky, M., Bornkessel, I.; Frisch, S., & Haider, H. (2004). Fractionating language comprehension via frequency characteristics of the human EEG. NeuroReport, 15, 409–412.10.1097/00001756-200403010-00005Search in Google Scholar

Saddy, D., Drenhaus, H., & Frisch, S. (2004). Processing polarity items: Contrastive licensing costs. Brain and Language, 90, 495–502.10.1016/S0093-934X(03)00470-XSearch in Google Scholar

Schomer, D. L., & Lopes da Silva, F. (2011). Niedermeyer’s Electroencephalography: Basic Principles, Clinical Applications, and Related Fields. Lippincott Williams&Wilki; 6th Revised edition.Search in Google Scholar

Sharbrough, F., Chartrian, G. E., Lesser, R. P., Lüders, H., Nuwer, M., & Picton, T. W. (1995). American Electroencephalographic Society guidelines for standard electrode position nomenclature. Journal of Clinical Neurophysiology, 8, 200–202.Search in Google Scholar

Stolterfoht, B., & Bader, M. (2004). Focus structure and the processing of word order variations in German. Information structure: Theoretical and Empirical Aspects, 259–275.10.1515/9783110905892.259Search in Google Scholar

Stolterfoht, B., Friederici, A. D., Alter, K., & Steube, A. (2007). Processing focus structure and implicit prosody during reading: Differential ERP effects. Cognition, 104(3), 565–590.10.1016/j.cognition.2006.08.001Search in Google Scholar

Vasishth, S., & Drenhaus, H. (2011) Locality effects in German. Dialogue and Discourse. 2(1), ­59–­82.Search in Google Scholar

Vos, S. H., Gunter, T. C., Kolk, H., & Mulder, G. (2001). Working memory constraints on syntactic processing: An electrophysiological investigation. Psychophysiology, 38(01), 41–63.10.1111/1469-8986.3810041Search in Google Scholar

Zschocke, S. (2002). Klinische Elektroenzephalographie. Springer.10.1007/978-3-662-08106-8Search in Google Scholar

Online erschienen: 2012
Erschienen im Druck: 2012

© 2012 Walter de Gruyter GmbH & Co. KG, Berlin/Boston

Articles in the same Issue

  1. Inhalt
  2. Aufsätze
  3. Sprache und Geschlecht im universitären Diskurs [Language and Gender in University Discourse]
  4. Sprache und Geschlecht im universitären Diskurs
  5. Themenschwerpunkt „Empirie und Modellierung“
  6. Einleitung [Introduction]
  7. Einleitung zum Themenheft Empirie und Modellierung
  8. Statistische Modellierung [Statistical Modeling]
  9. Statistische Modellierung
  10. Ereigniskorrelierte Potenziale (EKPs) [Event-Related Potentials (ERPs)]
  11. Ereigniskorrelierte Potenziale (EKPs)
  12. Computationelle Neurolinguistik [Computational Neurolinguistics]
  13. Computationelle Neurolinguistik
  14. Berichte
  15. Empirische Zugänge zur Semantik. Arbeitstagung Linguistische Pragmatik an der Georg-August-Universität Göttingen am 22. Februar 2011 [Empirical Approaches to Semantics. Working Meeting on Linguistic Pragmatics at the University of Göttingen, on February 22nd 2011]
  16. Empirische Zugänge zur Semantik
  17. Historische Semantik im Dialog der Fachkulturen. 2. Jahrestagung der Gesellschaft für germanistische Sprachgeschichte e. V. in Heidelberg [Historical Semantics in the Dialogue of Professional Cultures. 2nd Annual Conference of the Society for German Language History in Heidelberg]
  18. Historische Semantik im Dialog der Fachkulturen
  19. Linguistik im Internet
  20. Bildlinguistik (Text und Bild) im Internet [Image Linguistics (Text and Image) on the Internet]
  21. Bildlinguistik (Text & Bild) im Internet
  22. Neue Bücher 2011
  23. Neue Bücher 2011
  24. Zeitschriftenschau [Journal Review]
  25. Zeitschriftenschau
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