Chinese character handwriting: A large-scale behavioral study and a database.
Chinese
Database
Handwriting
Lexicon
Orthography
Phonology
Journal
Behavior research methods
ISSN: 1554-3528
Titre abrégé: Behav Res Methods
Pays: United States
ID NLM: 101244316
Informations de publication
Date de publication:
02 2020
02 2020
Historique:
pubmed:
26
2
2019
medline:
6
8
2020
entrez:
27
2
2019
Statut:
ppublish
Résumé
We report on a psycholinguistic database of Chinese character handwriting based on a large-scale study that involved 203 participants, each handwriting 200 characters randomly sampled from a cohort of 1,600 characters. Apart from collecting writing latencies, durations, and accuracy, we also compiled 14 lexical variables for each character. Regressions showed that frequency, age of acquisition, and the word context (in which a character appears) are all-around and influential predictors of orthographic access (as reflected in writing latency), motor execution of handwriting (as reflected in writing duration), and accuracy. In addition, phonological factors (phonogram status, spelling regularity, and homophone density) impacted orthographic access but not handwriting execution. Semantic factors (imageability and concreteness) only affected accuracy. These results suggest, among other things, that phonology is consulted in orthographic access while handwriting. As the first of its kind, this database can be used as a source of secondary data analyses and a tool for stimulus construction in handwriting research.
Identifiants
pubmed: 30805862
doi: 10.3758/s13428-019-01206-4
pii: 10.3758/s13428-019-01206-4
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
82-96Références
Afonso, O., & Álvarez, C. J. (2011). Phonological effects in handwriting production: Evidence from the implicit priming paradigm. Journal of Experimental Psychology: Learning, Memory, and Cognition, 37, 1474–1483. https://doi.org/10.1037/a0024515
doi: 10.1037/a0024515
pubmed: 21767055
Balota, D. A., Cortese, M. J., Sergent-Marshall, S. D., Spieler, D. H., & Yap, M. J. (2004). Visual word recognition of single-syllable words. Journal of Experimental Psychology: General, 133, 283–316. https://doi.org/10.1037/0096-3445.133.2.283
doi: 10.1037/0096-3445.133.2.283
Balota, D. A., & Ferraro, F. R. (1993). A dissociation of frequency and regularity effects in pronunciation performance across young-adults, older adults, and individuals with senile dementia of the Alzheimer-type. Journal of Memory and Language, 32, 573–592. https://doi.org/10.1006/jmla.1993.1029
doi: 10.1006/jmla.1993.1029
Balota, D. A., Yap, M. J., Cortese, M. J., Hutchison, K. A., Kessler, B., Loftis, B., ... Treiman, R. (2007). The English Lexicon Project. Behavior Research Methods, 39, 445–459. https://doi.org/10.3758/BF03193014
doi: 10.3758/BF03193014
Barca, L., Burani, C., & Arduino, L. S. (2002). Word naming times and psycholinguistic norms for Italian nouns. Behavior Research Methods, Instruments, & Computers, 34, 424–434. https://doi.org/10.3758/BF03195471
doi: 10.3758/BF03195471
Baxter, D. M., & Warrington, E. K. (1986). Ideational agraphia: A single case study. Journal of Neurology, Neurosurgery & Psychiatry, 49, 369–374. https://doi.org/10.1136/jnnp.49.4.369
doi: 10.1136/jnnp.49.4.369
Bloemsaat, G., Van Galen, G. P., & Meulenbroek, R. G. (2003). Lateralized effects of orthographical irregularity and auditory memory load on the kinematics of transcription typewriting. Psychological Research, 67, 123–133. https://doi.org/10.1007/s00426-002-0112-7
doi: 10.1007/s00426-002-0112-7
pubmed: 12739147
Bonin, P., Fayol, M., & Chalard, M. (2001). Age of acquisition and word frequency in written picture naming. Quarterly Journal of Experimental Psychology, 54A, 469–489. https://doi.org/10.1080/713755968
doi: 10.1080/713755968
Bonin, P., Méot, A., & Bugaiska, A. (2018). Concreteness norms for 1,659 French words: Relationships with other psycholinguistic variables and word recognition times. Behavior Research Methods, 50, 2366–2387. https://doi.org/10.3758/s13428-018-1014-y
doi: 10.3758/s13428-018-1014-y
pubmed: 29435912
Bonin, P., Méot, A., Lagarrigue, A., & Roux, S. (2015). Written object naming, spelling to dictation, and immediate copying: Different tasks, different pathways? Quarterly Journal of Experimental Psychology, 68, 1268–1294. https://doi.org/10.1080/17470218.2014.978877
doi: 10.1080/17470218.2014.978877
Bonin, P., Peereman, R., & Fayol, M. (2001). Do phonological codes constrain the selection of orthographic codes in written picture naming? Journal of Memory and Language, 45, 688–720. https://doi.org/10.1006/jmla.2000.2786
doi: 10.1006/jmla.2000.2786
Brysbaert, M., & Ghyselinck, M. (2006). The effect of age of acquisition: Partly frequency related, partly frequency independent. Visual Cognition, 13, 992–1011. https://doi.org/10.1080/13506280544000165
doi: 10.1080/13506280544000165
Cai, H., Qi, X., Chen, Q., & Zhong, Y. (2012). Effects of phonetic radical position on the regularity effect for naming pictophonetic characters (in Chinese). Acta Psychologica Sinica, 44, 868–881. https://doi.org/10.3724/sp.j.1041.2012.00868
doi: 10.3724/sp.j.1041.2012.00868
Cai, Q., & Brysbaert, M. (2010). SUBTLEX-CH: Chinese word and character frequencies based on film subtitles. PLoS ONE, 5, e10729:1–8. https://doi.org/10.1371/journal.pone.0010729
doi: 10.1371/journal.pone.0010729
pubmed: 20532192
pmcid: 2880003
Cai, Z. G., & Vigliocco, V. (2018). Word processing. In J. T. Wixted & S. Thompson-Schill (Eds.), Stevens’ handbook of experimental psychology and cognitive neuroscience, Volume 3: Language and thought (4th ed., pp. 75–110). New York, NY: Wiley.
Carreiras, M., & Perea, M. (2004). Naming pseudowords in Spanish: Effects of syllable frequency. Brain and Language, 90, 393–400. https://doi.org/10.1016/j.bandl.2003.12.003
doi: 10.1016/j.bandl.2003.12.003
pubmed: 15172555
Chang, Y. N., Hsu, C. H., Tsai, J. L., Chen, C. L., & Lee, C. Y. (2016). A psycholinguistic database for traditional Chinese character naming. Behavior Research Methods, 48, 112–122. https://doi.org/10.3758/s13428-014-0559-7
doi: 10.3758/s13428-014-0559-7
pubmed: 25630311
Chen, B. G., & Peng, D. L. (1998). The influence of concreteness on word recognition (in Chinese). Acta Psychologica Sinica, 30, 387–393.
Chinese Character Encoding Group of Shanghai Jiao Tong University, & Chinese Pinyin Characters Research Group in Shanghai. (1988). Dictionary of Chinese Character Information (汉字信息字典). Beijing, China: Science Press.
Chinese Ministry of Culture & State Language Affairs Commission. (1986). Dictionary of Common Chinese Characters in Print (印刷通用汉字字形表). Beijing, China: Language Reform Publishing House
Chinese Ministry of Culture & State Language Affairs Commission. (1988). Modern Dictionary of Common Characters in Chinese (现代汉语通用字表). Beijing, China: The Press and Publications Administration of the P.R.C.
Cholin, J., Levelt, W. J. M., & Schiller, N. O. (2006). Effects of syllable frequency in speech production. Cognition, 99, 205–235. https://doi.org/10.1016/j.cognition.2005.01.009
doi: 10.1016/j.cognition.2005.01.009
pubmed: 15939415
Coltheart, V., Laxon, V. J., & Keating, C. (1988). Effects of word imageability and age of acquisition on children’s reading. British Journal of Psychology, 79, 1–12. https://doi.org/10.1111/j.2044-8295.1988.tb02270.x
doi: 10.1111/j.2044-8295.1988.tb02270.x
Cortese, M. J., Simpson, G. B., & Woolsey, S. (1997). Effects of association and imageability on phonological mapping. Psychonomic Bulletin & Review, 4, 226–231. https://doi.org/10.3758/BF03209397
doi: 10.3758/BF03209397
Damian, M. F. (2003). Articulatory duration in single-word speech production. Journal of Experimental Psychology: Learning, Memory, and Cognition, 29, 416–431. https://doi.org/10.1037/0278-7393.29.3.416
doi: 10.1037/0278-7393.29.3.416
pubmed: 12776752
Damian, M. F., & Dumay, N. (2007). Time pressure and phonological advance planning in spoken production. Journal of Memory and Language, 57, 195–209. https://doi.org/10.1016/j.jml.2006.11.001
doi: 10.1016/j.jml.2006.11.001
Damian, M. F., & Dumay, N. (2009). Exploring phonological encoding through repeated segments. Language & Cognitive Processes, 24, 685–712. https://doi.org/10.1080/01690960802351260
doi: 10.1080/01690960802351260
Damian, M. F., & Stadthagen-Gonzalez, H. (2009). Advance planning of form properties in the written production of single and multiple words. Language & Cognitive Processes, 24, 555–579. https://doi.org/10.1080/01690960802346500
doi: 10.1080/01690960802346500
Delattre, M., Bonin, P., & Barry, C. (2006). Written spelling to dictation: Sound-to-spelling regularity affects both writing latencies and durations. Journal of Experimental Psychology: Learning, Memory, and Cognition, 32, 1330–1340. https://doi.org/10.1037/0278-7393.32.6.1330
doi: 10.1037/0278-7393.32.6.1330
pubmed: 17087587
Ellis, A. W., & Lambon Ralph, M. A. (2000). Age of acquisition effects in adult lexical processing reflect loss of plasticity in maturing systems: Insights from connectionist networks. Journal of Experimental Psychology: Learning, Memory, and Cognition, 26, 1103–1123. https://doi.org/10.1037/0278-7393.26.5.1103
doi: 10.1037/0278-7393.26.5.1103
pubmed: 11009247
Ferrand, L., New, B., Brysbaert, M., Keuleers, E., Bonin, P., Meot, A., ... Pallier, C. (2010). The French Lexicon Project: lexical decision data for 38,840 French words and 38,840 pseudowords. Behavior Research Methods, 42, 488–496. https://doi.org/10.3758/BRM.42.2.488
doi: 10.3758/BRM.42.2.488
Ferreira, F., & Swets, B. (2002). How incremental is language production? Evidence from the production of utterances requiring the computation of arithmetic sums. Journal of Memory and Language, 46, 57–84. https://doi.org/10.1006/jmla.2001.2797
doi: 10.1006/jmla.2001.2797
Fu, Y. (1989). Dictionary of Chinese character properties(汉字属性字典). Beijing, China: Language and Culture Press.
Geschwind, N. (1969). Problems in the anatomical understanding of the aphasias. In A. L. Benton (Ed.), Contributions to clinical neuropsychology. Chicago, IL: Aldine.
Ghyselinck, M., Lewis, M. B., & Brysbaert, M. (2004). Age of acquisition and the cumulative-frequency hypothesis: A review of the literature and a new multi-task investigation. Acta Psychologica, 115, 43–67. https://doi.org/10.1016/j.actpsy.2003.11.002
doi: 10.1016/j.actpsy.2003.11.002
pubmed: 14734241
González-Alvarez, J., & Palomar-García, M.-A. (2016). Syllable frequency and spoken word recognition: An inhibitory effect. Psychological Reports, 119, 263–275. https://doi.org/10.1177/0033294116654449
doi: 10.1177/0033294116654449
pubmed: 27287267
Grömping, U. (2006). Relative importance for linear regression in R: The package relaimpo. Journal of Statistical Software, 17, 1–27.
doi: 10.18637/jss.v017.i01
Guasch, M., Ferré, P., & Fraga, I. (2016). Spanish norms for affective and lexico-semantic variables for 1,400 words. Behavior Research Methods, 48, 1358–1369. https://doi.org/10.3758/s13428-015-0684-y
doi: 10.3758/s13428-015-0684-y
pubmed: 26542969
Jescheniak, J. D., & Levelt, W. J. M. (1994). Word frequency effects in speech production: Retrieval of syntactic in formation and of phonological form. Journal of Experimental Psychology: Learning, Memory, and Cognition, 20, 824–843. https://doi.org/10.1037/0278-7393.20.4.824
doi: 10.1037/0278-7393.20.4.824
Johnson, J. W., & Lebreton, J. M. (2004). History and use of relative importance indices in organizational research. Organizational Research Methods, 7, 238–257. https://doi.org/10.1177/1094428104266510
doi: 10.1177/1094428104266510
Kandel, S., & Perret, C. (2015). How does the interaction between spelling and motor processes build up during writing acquisition? Cognition, 136, 325–336. https://doi.org/10.1016/j.cognition.2014.11.014
doi: 10.1016/j.cognition.2014.11.014
pubmed: 25525970
Kello, C. T., Plaut, D. C., & MacWhinney, B. (2000). The task dependence of staged versus cascaded processing: An empirical and computational study of Stroop interference in speech perception. Journal of Experimental Psychology: General, 129, 340–360. https://doi.org/10.1037/0096-3445.129.3.340
doi: 10.1037/0096-3445.129.3.340
Keuleers, E., Diependaele, K., & Brysbaert, M. (2010). Practice effects in large-scale visual word recognition studies: A lexical decision study on 14,000 Dutch mono- and disyllabic words and nonwords. Frontiers in Psychology, 1, 174:1–15. https://doi.org/10.3389/fpsyg.2010.00174
doi: 10.3389/fpsyg.2010.00174
pubmed: 21833236
pmcid: 3153785
Keuleers, E., Lacey, P., Rastle, K., & Brysbaert, M. (2012). The British Lexicon Project: Lexical decision data for 28,730 monosyllabic and disyllabic English words. Behavior Research Methods, 44, 287–304. https://doi.org/10.3758/s13428-011-0118-4
doi: 10.3758/s13428-011-0118-4
pubmed: 21720920
Kousta, S.-T., Vigliocco, G., Vinson, D. P., Andrews, M., & Del Campo, E. (2011). The representation of abstract words: Why emotion matters. Journal of Experimental Psychology: General, 140, 14–34. https://doi.org/10.1037/a0021446
doi: 10.1037/a0021446
Leck, K. J., Weekes, B. S., & Chen, M. J. (1995). Visual and phonological pathways to the lexicon: Evidence from Chinese readers. Memory & Cognition, 23, 468–476. https://doi.org/10.3758/BF03197248
doi: 10.3758/BF03197248
Lee, C.-Y., Tsai, J.-L., Su, E. C.-I., Tzeng, O. J. L., & Hung, D. L. (2005). Consistency, regularity, and frequency effects in naming Chinese. Language and Linguistics, 6, 75–107.
Leong, C. K., Cheng, P.-W., & Mulcahy, R. (1987). Automatic processing of morphemic orthography by mature readers. Language and Speech, 30, 181–196. https://doi.org/10.1177/002383098703000207
doi: 10.1177/002383098703000207
pubmed: 3505318
Levelt, W. J. M., Roelofs, A., & Meyer, A. S. (1999). A theory of lexical access in speech production. Behavioral and Brain Sciences, 22, 1–38, disc. 38–75. https://doi.org/10.1017/S0140525X99001776
doi: 10.1017/S0140525X99001776
pubmed: 11301520
Lewis, M. B. (1999). Age of acquisition in face categorisation: Is there an instance-based account? Cognition, 71, B23–B39. https://doi.org/10.1016/S0010-0277(99)00020-7
doi: 10.1016/S0010-0277(99)00020-7
pubmed: 10394712
Lewis, M. B., Gerhand, S., & Ellis, H. D. (2001). Re-evaluating age-of-acquisition effects: Are they simply cumulative-frequency effects? Cognition, 78, 189–205. https://doi.org/10.1016/S0010-0277(00)00117-7
doi: 10.1016/S0010-0277(00)00117-7
pubmed: 11074250
Lien, Y.-W. (1985). Consistency of the phonetic clues in the Chinese phonograms and their naming latencies. Psychological Department. National Taiwan University, Taipei.
Linguistics Institute of Chinese Academy of Social Sciences. (2011). Xinhua dictionary (新华字典, version 11). Beijing, China: Commercial Press.
Liu, Y., Shu, H., & Li, P. (2007). Word naming and psycholinguistic norms: Chinese. Behavior Research Methods, 39, 192–198. https://doi.org/10.3758/BF03193147
doi: 10.3758/BF03193147
pubmed: 17695344
Luria, A. R. (1970). Traumatic aphasia. The Hague, The Netherlands: Mouton.
doi: 10.1515/9783110816297
Ni, H. (1982). Dictionary of modern Chinese phonograms (现代汉字形声字字汇). Beijing, China: Language and Culture Press.
Peng, D., & Wang, C. (1997). Basic processing unit of Chinese character recognition: Evidence from stroke number effect and radical number effect (in Chinese). Acta Psychologica Sinica, 29.
Perez, M. A. (2007). Age of acquisition persists as the main factor in picture naming when cumulative word frequency and frequency trajectory are controlled. Quarterly Journal of Experimental Psychology, 60, 32–42. https://doi.org/10.1080/17470210600577423
doi: 10.1080/17470210600577423
Pexman, P. M., Lupker, S. J., & Jared, D. (2001). Homophone effects in lexical decision. Journal of Experimental Psychology: Learning, Memory, and Cognition, 27, 139–156. https://doi.org/10.1037/0278-7393.27.1.139
doi: 10.1037/0278-7393.27.1.139
pubmed: 11204094
Qu, Q., Damian, M. F., Zhang, Q., & Zhu, X. (2011). Phonology contributes to writing: Evidence from written word production in a nonalphabetic script. Psychological Science, 22, 1107–1112. https://doi.org/10.1177/0956797611417001
doi: 10.1177/0956797611417001
pubmed: 21775652
Qu, Q., Zhang, Q., & Damian, M. F. (2016). Tracking the time course of lexical access in orthographic production: An event-related potential study of word frequency effects in written picture naming. Brain and Language, 159, 118–126. https://doi.org/10.1016/j.bandl.2016.06.008
doi: 10.1016/j.bandl.2016.06.008
pubmed: 27393929
Rapp, B., Benzing, L., & Caramazza, A. (1997). The autonomy of lexical orthography. Cognitive Neuropsychology, 14, 71–104. https://doi.org/10.1080/026432997381628
doi: 10.1080/026432997381628
Roux, S., McKeeff, T. J., Grosjacques, G., Afonso, O., & Kandel, S. (2013). The interaction between central and peripheral processes in handwriting production. Cognition, 127, 235–241. https://doi.org/10.1016/j.cognition.2012.12.009
doi: 10.1016/j.cognition.2012.12.009
pubmed: 23454797
Schriefers, H., de Ruiter, J. P., & Steigerwald, M. (1999). Parallelism in the production of noun phrases: Experiments and reaction time models. Journal of Experimental Psychology: Learning, Memory, and Cognition, 25, 702–720. https://doi.org/10.1037/0278-7393.25.3.702
doi: 10.1037/0278-7393.25.3.702
Schriefers, H., & Teruel, E. (1999). Phonological facilitation in the production of two-word utterances. European Journal of Cognitive Psychology, 11, 17–50. https://doi.org/10.1080/713752301
doi: 10.1080/713752301
Sereno, S. C., Brewer, C. C., & O’Donnell, P. J. (2003). Context effects in word recognition: Evidence for early interactive processing. Psychological Science, 14, 328–333. https://doi.org/10.1111/1467-9280.14471
doi: 10.1111/1467-9280.14471
pubmed: 12807405
Shu, H., Chen, X., Anderson, R. C., Wu, N., & Xuan, Y. (2003). Properties of school Chinese: Implications for learning to read. Child Development, 74, 27–47. https://doi.org/10.1111/1467-8624.00519
doi: 10.1111/1467-8624.00519
pubmed: 12625434
Søvik, N., Arntzen, O., Samuelstuen, M., & Heggberget, M. (1994). Relations between linguistic word groups and writing. In C. Faure, G. Lorette, & A. Vinter (Eds.), Advances in handwriting and drawing: A multidisciplinary approach (pp. 231–246). Paris, France: Europia.
Su, Y.-F., & Samuels, S. J. (2010). Developmental changes in character-complexity and word-length effects when reading Chinese script. Reading and Writing, 23, 1085–1108. https://doi.org/10.1007/s11145-009-9197-3
doi: 10.1007/s11145-009-9197-3
Sze, W. P., Rickard Liow, S. J., & Yap, M. J. (2014). The Chinese Lexicon Project: A repository of lexical decision behavioral responses for 2,500 Chinese characters. Behavior Research Methods, 46, 263–273. https://doi.org/10.3758/s13428-013-0355-9
doi: 10.3758/s13428-013-0355-9
pubmed: 23813237
van Galen, G. P. (1991). Handwriting: Issues for a psychomotor theory. Human Movement Science, 10, 165–191. https://doi.org/10.1016/0167-9457(91)90003-G
doi: 10.1016/0167-9457(91)90003-G
Wang, C., & Zhang, Q. (2015). Phonological codes constrain output of orthographic codes via sublexical and lexical routes in Chinese written production. PLoS ONE, 10, e0124470. https://doi.org/10.1371/journal.pone.0124470
doi: 10.1371/journal.pone.0124470
pubmed: 25879662
pmcid: 4400079
Wang, Q., & Dong, Y. (2013). The N2- and N400-like effects of radicals on complex Chinese characters. Neuroscience Letters, 548, 301–305. https://doi.org/10.1016/j.neulet.2013.05.074
doi: 10.1016/j.neulet.2013.05.074
pubmed: 23769727
Woollams, A. M. (2005). Imageability and ambiguity effects in speeded naming: Convergence and divergence. Journal of Experimental Psychology: Learning, Memory, and Cognition, 31, 878–890. https://doi.org/10.1037/0278-7393.31.5.878
doi: 10.1037/0278-7393.31.5.878
pubmed: 16248739
www.cctv.com (2006). 你提笔忘字吗? http://news.cctv.com/education/20061011/104804.shtml [Retrieved 14/05/2018].
Yang, S., Zhang, S., & Wang, Q. (2016). P2 and behavioral effects of stroke count in Chinese characters: Evidence for an analytic and attentional view. Neuroscience Letters, 628, 123–127. https://doi.org/10.1016/j.neulet.2016.06.006
doi: 10.1016/j.neulet.2016.06.006
pubmed: 27267132
Yap, M. J., Liow, S. J., Jalil, S. B., & Faizal, S. S. (2010). The Malay Lexicon Project: A database of lexical statistics for 9,592 words. Behavior Research Methods, 42, 992–1003. https://doi.org/10.3758/BRM.42.4.992
doi: 10.3758/BRM.42.4.992
pubmed: 21139166
Zhang, J., & Li, M. (2010). The effects of Chinese input methods on the links among the orthography, phonology and meaning of Chinese characters (in Chinese). Journal of Psychological Science, 33, 835–838.
Zhang, Q., & Damian, M. F. (2010). Impact of phonology on the generation of handwritten responses: Evidence from picture-word interference tasks. Memory & Cognition, 38, 519–528. https://doi.org/10.3758/MC.38.4.519
doi: 10.3758/MC.38.4.519
Zhang, Q., & Feng, C. (2017). The interaction between central and peripheral processing in Chinese handwritten production: Evidence from the effect of lexicality and radical complexity. Frontiers in Psychology, 8, 334. https://doi.org/10.3389/fpsyg.2017.00334
doi: 10.3389/fpsyg.2017.00334
pubmed: 28348536
pmcid: 5346556
Zhang, Q., & Wang, C. (2014). Syllable frequency and word frequency effects in spoken and written word production in a non-alphabetic script. Frontiers in Psychology, 5, 120. https://doi.org/10.3389/fpsyg.2014.00120
doi: 10.3389/fpsyg.2014.00120
pubmed: 24600420
pmcid: 3927083
Zhang, Q., & Wang, C. (2015). Phonology is not accessed earlier than orthography in Chinese written production: Evidence for the orthography autonomy hypothesis. Frontiers in Psychology, 6, 448. https://doi.org/10.3389/fpsyg.2015.00448
doi: 10.3389/fpsyg.2015.00448
pubmed: 25941503
pmcid: 4400847
Zhang, Q., & Yang, Y. (2003). The determiners of picture-naming latency (in Chinese). Acta Psychologica Sinica, 35, 447–454.
Zhou, X., Shu, H., Bi, Y., & Shi, D. (1999). Is there phonologically mediated access to lexical semantics in reading Chinese. In J. Wang, A. W. Inhoff, & H.-C. Chen (Eds.), Reading Chinese script: A cognitive analysis (pp. 135–171). Mahwah, NJ: Erlbaum.