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Discriminative Learning and the Lexicon: NDL and LDL  

Yu-Ying Chuang and R. Harald Baayen

Naive discriminative learning (NDL) and linear discriminative learning (LDL) are simple computational algorithms for lexical learning and lexical processing. Both NDL and LDL assume that learning is discriminative, driven by prediction error, and that it is this error that calibrates the association strength between input and output representations. Both words’ forms and their meanings are represented by numeric vectors, and mappings between forms and meanings are set up. For comprehension, form vectors predict meaning vectors. For production, meaning vectors map onto form vectors. These mappings can be learned incrementally, approximating how children learn the words of their language. Alternatively, optimal mappings representing the end state of learning can be estimated. The NDL and LDL algorithms are incorporated in a computational theory of the mental lexicon, the ‘discriminative lexicon’. The model shows good performance both with respect to production and comprehension accuracy, and for predicting aspects of lexical processing, including morphological processing, across a wide range of experiments. Since, mathematically, NDL and LDL implement multivariate multiple regression, the ‘discriminative lexicon’ provides a cognitively motivated statistical modeling approach to lexical processing.


Gothic and Other East Germanic Varieties  

Stefan Schaffner

Biblical Gothic is the earliest Germanic language preserved in a longer text. The main source is represented by the Bible translation of the Visigothic Arian Christian bishop Wulfila ( born ca. 311, deceased ca. 382–383). Another few short Gothic texts are extant. For the translation of the Bible (ca. 350–380), on the basis of a Greek text, Wulfila invented his own alphabet (called Wulfila’s alphabet), using the Greek alphabet as model, with the addition of Latin and runic characters. Several manuscripts (5th/6th century; the most famous is the Uppsala Codex argenteus) contain the greater part of the New Testament. In spite of its fragmentary documentation, Gothic represents without doubt an important basis for the reconstruction of Proto-Germanic, because it offers—due to its early attestation—very archaic features in all areas of its grammar in comparison with the other old Germanic languages, the documentation of which began some centuries later. Gothic also shows recent innovations (especially the almost complete elimination of the effects of Verner’s Law within the strong verbs). The position of Gothic within the other Germanic subgroups, North and West Germanic, is still a matter of controversial discussion. Whereas older research stressed the correspondences between Gothic and North Germanic and, therefore, favored a closer relationship between them, postulating a subgroup Goto-Nordic, currently, a subgrouping into Northwest Germanic on the one hand and East Germanic (with Gothic as the most important representative) one the other hand is preferred, although this model also leaves open a couple of questions, giving impetus to further research. Other varieties of East Germanic are runic epigraphic texts (less than 10, most of them probably Gothic) from the 1st half of the 3rd century until the end of the 6th century. One of them (on the Charnay fibula, 2nd half of the 6th century) is probably of Burgundian origin. The documentation of other EGrm (East Germanic). languages is very poor and consists almost only of a few names. Two short syntagmata can probably be attributed to Vandalic. Crimean Gothic, the latest attested EGrm. language, is documented in a list of several dozen words and three lines of a cantilena. Most attested forms seem to represent a late EGrm. dialect.


Psycholinguistic Research on Inflectional Morphology in the Romance Languages  

Claudia Marzi and Vito Pirrelli

Over the past decades, psycholinguistic aspects of word processing have made a considerable impact on views of language theory and language architecture. In the quest for the principles governing the ways human speakers perceive, store, access, and produce words, inflection issues have provided a challenging realm of scientific inquiry, and a battlefield for radically opposing views. It is somewhat ironic that some of the most influential cognitive models of inflection have long been based on evidence from an inflectionally impoverished language like English, where the notions of inflectional regularity, (de)composability, predictability, phonological complexity, and default productivity appear to be mutually implied. An analysis of more “complex” inflection systems such as those of Romance languages shows that this mutual implication is not a universal property of inflection, but a contingency of poorly contrastive, nearly isolating inflection systems. Far from presenting minor faults in a solid, theoretical edifice, Romance evidence appears to call into question the subdivision of labor between rules and exceptions, the on-line processing vs. long-term memory dichotomy, and the distinction between morphological processes and lexical representations. A dynamic, learning-based view of inflection is more compatible with this data, whereby morphological structure is an emergent property of the ways inflected forms are processed and stored, grounded in universal principles of lexical self-organization and their neuro-functional correlates.


The Status of the Morpheme  

Tom Leu

The morpheme was the central notion in morphological theorizing in the 20th century. It has a very intuitive appeal as the indivisible and invariant unit of form and meaning, a minimal linguistic sign. Ideally, that would be all there is to build words and sentences from. But this ideal does not appear to be entirely adequate. At least at a perhaps superficial understanding of form as a series of phonemes, and of meaning as concepts and morphosyntactic feature sets, the form and the meaning side of words are often not structured isomorphically. Different analytical reactions are possible to deal with the empirical challenges resulting from the various kinds of non-isomorphism between form and meaning. One prominent option is to reject the morpheme and to recognize conceptually larger units such as the word or the lexeme and its paradigm as the operands of morphological theory. This contrasts with various theoretical options maintaining the morpheme, terminologically or at least conceptually at some level. One such option is to maintain the morpheme as a minimal unit of form, relaxing the tension imposed by the meaning requirement. Another option is to maintain it as a minimal morphosyntactic unit, relaxing the requirements on the form side. The latter (and to a lesser extent also the former) has been understood in various profoundly different ways: association of one morpheme with several form variants, association of a morpheme with non-self-sufficient phonological units, or association of a morpheme with a formal process distinct from affixation. Variants of all of these possibilities have been entertained and have established distinct schools of thought. The overall architecture of the grammar, in particular the way that the morphology integrates with the syntax and the phonology, has become a driving force in the debate. If there are morpheme-sized units, are they pre-syntactic or post-syntactic units? Is the association between meaning and phonological information pre-syntactic or post-syntactic? Do morpheme-sized pieces have a specific status in the syntax? Invoking some of the main issues involved, this article draws a profile of the debate, following the term morpheme on a by-and-large chronological path from the late 19th century to the 21st century.