Semantic and phonological activation in noun and pronoun production.

Speakers can refer to objects and other entities by nouns or pronouns. The present article investigated the production of gender-marked pronouns in German. Four picture-word interference experiments are reported, addressing 2 questions. First, is the lemma of a referent noun (i.e., the representation of the referent noun's semantic and syntactic properties) accessed when producing a pronoun? Second, if so, is this access confined to the lemma, or will the referent noun's phonological form be activated, too? The results suggest that in generating pronouns, speakers accessed the lemma of the referent noun, whereas its phonological form was not substantially activated. The results are discussed in the context of other recent experimental studies of pronoun and noun production.

Priming effects from phonologically related distractors in picture-word interference.

In the cross-modal picture-word interference task, distractors phonologically related to a to-be-named picture facilitate the naming response as compared to unrelated distractors. Our experiment shows that this phonological priming effect can be obtained with as early an SOA as -300 ms. The experiment also demonstrates that this priming effect cannot be attributed to strategic behaviour of the participants as opposed to automatic preactivation processes in the lexical-conceptual system. The implications for studies using the picture-word interference task as a tool for investigating lexicalization processes in speech production are discussed.

What's left if the Jabberwock gets the semantics? An ERP investigation into semantic and syntactic processes during auditory sentence comprehension.

This study examined auditory ERP responses to syntactic phrase structure violations occurring either in sentences containing regular words or in sentences in which content words had been replaced by pseudowords while retaining morphological markers (so-called jabberwocky sentences). Syntactic violations were found to elicit an early anterior negativity followed by a P600 for both types of sentences, suggesting that the syntactic processes in question are independent of the presence of lexical-semantic information. In syntactically correct sentences, content words in regular sentences elicited an N400 component while their pseudoword place-holders in jabberwocky sentences did not. By contrast, in syntactically incorrect sentences neither sentence type showed an N400 for the word creating the syntactic violation, indicating that the detection of a syntactic error at an early stage blocks semantic integration processes in regular sentences. We discuss these results and findings from related studies in the light of a timing hypothesis of syntactic and semantic information processing and propose that syntactic information extracted particularly early can affect semantic processes while syntactic information extracted relatively late cannot.

The cataphoric use of spoken stress in narratives.

This study investigated the effects of introducing a concept into discourse either marked with spoken stress or in an unstressed form using a story continuation paradigm. Participants first listened to informal narratives and then continued them. The final phrase of the narratives introduced a new concept. If that concept had been introduced in a stressed form, participants referred to it more often and sooner. Also, there was a tendency towards using a higher proportion of pronominal references as opposed to NP references. These results closely resemble the findings of Gernsbacher and Shroyer, who, using the same experimental procedure, investigated the effect of marking a concept with the unstressed, indefinite article this as opposed to a/an. The two studies together support the notion of a common cataphoric function of the two linguistic devices; they mark concepts the speaker is likely to refer to again.

Cataphoric devices in spoken discourse.

We propose that speakers mark key words with cataphoric devices. Cataphoric devices are counterparts to anaphoric devices: Just as anaphoric devices enable backward reference, cataphoric devices enable forward reference. And just as anaphoric devices mark concepts that have been mentioned before, cataphoric devices mark concepts that are likely to be mentioned again. We investigated two cataphoric devices: spoken stress and the indefinite this. Our experiments demonstrated three ways that concepts marked by cataphoric devices gain a privileged status in listeners' mental representations: Cataphoric devices enhance the activation of the concepts that they mark; cataphoric devices suppress the activation of previously mentioned concepts; and cataphoric devices protect the concepts that they mark from being suppressed by subsequently mentioned concepts.