The Mental Lexicon - Volume 15, Issue 2, 2020

The N400 has been seen to be larger for concrete than abstract words, and for pseudowords than real words. Using a word vector analysis to calculate semantic associates (SA), as well as ratings for emotional arousal (EA), and a measure of orthographic neighbourhood (ON), the present study investigated the relation between these factors and N400 amplitudes during a lexical decision task using Swedish word stimuli. Four noun categories differing in concreteness: specific (squirrel), general (animal) emotional (happiness) and abstract (tendency) were compared with pseudowords (danalod). Results showed that N400 amplitudes increased in the order emotional < abstract < general < specific < pseudoword. A regression analysis showed that the amplitude of the N400 decreased the more semantic associates a word had and the higher the rating for emotional arousal it had. The N400 also increased the more orthographic neighbours a word had. Results provide support for the hierarchical organisation of concrete words assumed in lexical semantics. They also demonstrate how affective information facilitates meaning processing.

Two experiments investigated how people perceived and remembered fragments of spoken words that either corresponded to correct lexical entries (as in the complex word drink-er) or did not (as in the simple word glitt-er). Experiment 1 was a noise-rating task that probed perception. Participants heard stimuli such drinker, where strikethrough indicates noise overlaid at a controlled signal-to-noise ratio, and rated the loudness of the noise. Results showed that participants rated noise on certain pseudo-roots (e.g., glitter) as louder than noise on true roots (drinker), indicating that they perceived them with less clarity. Experiment 2 was an eye-fixation task that probed memory. Participants heard a word such as drink-er while associating each fragment with a visual shape. At test, they saw the shapes again, and were asked to look at the shape associated with a particular fragment, such as drink. Results showed that fixations to shapes associated with pseudo-affixes (-er in glitter) were less accurate than fixations to shapes associated with true affixes (-er in drinker), which suggests that they remembered the pseudo-affixes more poorly. These findings provide evidence that the presence of correct lexical entries for roots and affixes modulates people’s judgments about the speech that they hear.

The present work investigated how morphological generalization, namely the way speakers extend their knowledge to novel complex words, is influenced by sources of variability in language and speaker properties. For this purpose, the study focused on a Semitic language (Hebrew), characterized by unique non-concatenative morphology, and native (L1) as well as non-native (L2) speakers. Two elicited production tasks tested what information sources speakers employ in verbal inflectional class generalization, i.e., in forming complex novel verbs. Phonological similarity was tested in Experiment 1 and argument structure in Experiment 2. The analysis focused on the two most common Hebrew inflectional classes, Paal and Piel, which also constituted the vast majority of responses in the two tasks. Unlike the commonly found outcomes in Romance inflectional class generalization, the results yielded, solely for Piel, a graded phonological similarity effect and a robust argument structure effect, i.e., more Piel responses in a direct object context than without. The L2 pattern partially differed from the L1: (i) argument structure effect for L2 speakers was weaker, and (ii) L2 speakers produced more Paal than Piel responses. The results are discussed within the framework of rule-based and input-based accounts.

We examined whether inhibition skills were recruited during the processing of compound words. Using an individual differences perspective, we analyzed whether participants’ scores on the Stroop test predicted performance on lexical decision tasks involving compound words varying in their level of semantic opacity. The results show that inhibition is involved in the comprehension of fully opaque (e.g., hogwash) and fully transparent (e.g., blueberry) compound words, but we found no evidence for such an effect in the comprehension of partially opaque compound words (e.g., strawberry, jailbird).

This study examines the processing of morphologically complex words focusing on how morphological (in addition to orthographic and semantic) factors affect bilingual word recognition. We report findings from a large experimental study with groups of bilingual (Turkish/German) speakers using the visual masked-priming technique. We found morphologically mediated effects on the response speed and the inter-individual variability within the bilingual participant group. We conclude that the grammar (qua morphological parsing) not only enhances speed of processing in bilingual language processing but also yields more uniform performance and thereby constrains variability within a group of otherwise heterogeneous individuals.

This study focuses on bilingual speakers of Ecuadoran Quichua and the mixed language known as Media Lengua, which consists of Quichua morphosyntactic frames with all content word roots relexified from Spanish. For all intents and purposes, only the lexicon – more specifically, lexical roots – separate Media Lengua from Quichua, and yet speakers generally manage to keep the two languages apart in production and are able to unequivocally distinguish the languages in perception tasks. Two main questions drive the research effort. The first, given the very close relationships between Quichua and Media Lengua, is whether each language has a distinct lexicon, or a single lexical repository is shared by the two languages. A second and closely related question is the extent to which language-specific phonotactic patterns aid in language identification, possibly even to the extent of constituting the only robust language-tagging mechanism in a joint lexicon. Using lexical-decision and false-memory tasks to probe the Quichua-Media Lengua bilingual lexical repertoire, the results are consistent with a model based on a single lexicon, partially differentiated by subtle phonotactic cues, and bolstered by contemporary participants’ knowledge of Spanish as well as Quichua.

The maze task (Forster, Guererra & Elliot, 2009; Forster, 2010) is designed to measure focal lexical and sentence processing effects in a highly controlled manner. We discuss how this task can be modified and extended to provide a unique opportunity for the investigation of lexical effects in sentence context. We present results that demonstrate how the maze task can be used to examine both facilitation and inhibition effects. Most importantly, it can do this while leaving the target sentence unchanged across conditions. This is an advantage that is not available with other paradigms. We also present new versions of the maze task that allow for the isolation of specific lexical effects and that enhance the measurement of lexical recognition through visual animation. Finally, we discuss how the maze task brings to the foreground the extent to which complex multi-layered priming and inhibition are intrinsic to sentence reading and how the maze task can tap this complexity.