en:cnk:mda - Příručka ČNK

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====== Multidimensional analysis of Czech ======

Multidimensional analysis (MDA) is a method developed by Douglas Biber ((Biber, D. (1988). //Variation Across Speech and Writing//. Cambridge, England: Cambridge University Press; Biber, D. (1995). //Dimensions of Register Variation: A Cross-Linguistic Comparison//. Cambridge, England: Cambridge University Press; Biber, D., & Conrad, S. (2009). //Register, Genre, and Style//. Cambridge, England: Cambridge University Press.)) 
for the empirical research of textual variability. MDA is based on the assumption that textual variability is manifested in the utilization of linguistic features from different levels (from phonology and morphology through lexicon to syntax and pragmatics). When designing a text, the use of one set of features is often conditioned or supported by the use of another, which leads to the assumption that in order to describe variability, it is optimal to group features into dimensions based on how they co-occur in texts. The dimensions created in this way, i.e. based on the detected co-occurrence of linguistic features in texts, represent the basic characteristics along which the texts exhibit variation and on the basis of which individual [[en:pojmy:register|registers]] can be defined.

The method for modelling register variability using MDA has become fixed over the years and consists of the following steps:

  * preparation of a corpus (see the [[en:cnk:koditex|Koditex]] corpus),
  * selection of features and their operationalization,
  * factor analysis,
  * interpretation of results.
===== Dimensions of Czech MDA =====
Based on empirical findings ((Cvrček, V. – Komrsková, Z. – Lukeš, D. – Poukarová, P. – Řehořková, A. – Zasina, A. J. (2018): [[https://www.degruyter.com/view/j/cllt.ahead-of-print/cllt-2018-0020/cllt-2018-0020.xml|From extra- to intratextual characteristics: Charting the space of variation in Czech through MDA]]. //Corpus Linguistics and Linguistic Theory.//)), it was established that the number of dimensions for Czech MDA would be 8. Each of the dimensions is characterized by several prominent linguistic features which are assigned either positive or negative values on a scale. For each of the dimensions, an all-encompassing name was chosen which reflects the interpretation of both extreme values. 

===Dimensions for Czech MDA:===
  - dynamic (+) vs. static (−)
  - spontaneous (+) vs. prepared (–)
  - higher (+) vs. lower (–) degree of cohesion
  - polythematic (+) vs. monothematic (–)
  - higher (+) vs. lower (–) degree of explicit addressability
  - general (+) vs. specific (–)
  - prospective (+) vs. retrospective (–)
  - attitude (+) vs. factuality (–)

===Overview of prominent linguistic features===

The numbers in the brackets signify loading, i.e. to the extent to which the presence of a given feature in the text contributes to its placement in the dimension.

^ Dimension ^ Features (+) ^ Features (–) ^||
| ** dynamic (+) vs. static (–)** | verbal tense – past (0.98)\\ verbs (0.96)\\ finite verbs (0.95)\\ indicative (0.95)\\ verbal aspect (perf.) (0.93)\\ 3rd person pronouns (0.78) | incongurent nominal postmodifiers (-0.79)\\ adjectives (-0.78)\\ abstrakta (-0.72)\\ congruent premodifiers (-0.72)\\ genitive (-0.72)\\ adjective clusters (-0.70) |||
| **spontaneous (+) vs. prepared (–)** | contact expressions (0.97)\\ filler words (0.85)\\ demonstrative pronouns (without "to") (0.82)\\ interjections (0.82)\\ expressive particles (other – the rest from COH2, AMP and DOWN) (0.80)\\ pronoun non-dropping (0.79) | prepositional cases in general (-0.62)\\ clauses with interrogative and relative adverbs (-0.57)\\ prepositions (-0.56)\\ verbal aspect (perf.) (-0.49)\\ nominative + accusative (-0.46)\\ unigrams (zTTR) (-0.46) |||
| **higher (+) vs. lower (–) degree of cohesion** | correlatives (0.59)\\ nominal predicate (0.53)\\ relative clauses of the "který" type (0.45)\\ possessive pronouns (0.44)\\ inventory of pronouns (0.44) | numerals (-0.43) |||
| **polythematic (+) vs. monothematic (–)** | bigrams (zTTR) (0.76)\\ unigrams (zTTR) (0.70)\\ toponyms (0.37) | thematic concentration (-0.61)\\ Yule's coefficient (-0.49)\\ verbal nouns (-0.45)\\ verbal voice (passive) (-0.42) |||
| **higher (+) vs. lower (–) degree of explicit addressability** | questions (all) (0.69)\\ verbs in 2nd person (0.66)\\ wh-questions (0.63)\\ 2nd person pronouns (0.62)\\ verbal tense – future (0.53) | average clause length in number of tokens (-0.36)\\ frequent ngrams (-0.30) |||
| **general (+) vs. specific (–)** | koordinace (0.58)\\ sémanticky vyprázdněná adjektiva (0.41) | antroponyma (-0.49)\\ numerale (-0.40)\\ časové výrazy (-0.36) |||
| **prospective (+) vs. retrospective (–)** | slovesný čas – přít. (0.77)\\ slovesný čas – bud. (0.55)\\ jmenný přísudek adj. (0.52)\\ imperativ (0.42)\\ 2. slovesná osoba (0.40) | slovesný čas – min (-0.74)\\ zájmena pro 3. os. (-0.43)\\ přivlastňovací adjektiva (-0.39)\\ vztažné věty typu jenž (-0.36) |||
| **attitude (+) vs. factuality (–)** | částice oslabující význam (downtoners/hedges) (0.68)\\ restriktory (0.63)\\ částice zesilující význam (amplifiers/boosters) (0.57)\\ částice členící text (0.52)\\ adverbia (0.50) | koordinace (-0.33) |||

==== Related links ====

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[[en:cnk:registrova_klasifikace|Classification of registers]] • [[en:cnk:koditex|Koditex]]
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