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Dive into the research topics where Jan de Ruiter is active.

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Featured researches published by Jan de Ruiter.


Proceedings of the National Academy of Sciences of the United States of America | 2009

Universals and cultural variation in turn-taking in conversation

Tanya Stivers; N. J. Enfield; Penelope Brown; Christina Englert; Makoto Hayashi; Trine Heinemann; Gertie Hoymann; Federico Rossano; Jan de Ruiter; Kyung Eun Yoon; Stephen C. Levinson

Informal verbal interaction is the core matrix for human social life. A mechanism for coordinating this basic mode of interaction is a system of turn-taking that regulates who is to speak and when. Yet relatively little is known about how this system varies across cultures. The anthropological literature reports significant cultural differences in the timing of turn-taking in ordinary conversation. We test these claims and show that in fact there are striking universals in the underlying pattern of response latency in conversation. Using a worldwide sample of 10 languages drawn from traditional indigenous communities to major world languages, we show that all of the languages tested provide clear evidence for a general avoidance of overlapping talk and a minimization of silence between conversational turns. In addition, all of the languages show the same factors explaining within-language variation in speed of response. We do, however, find differences across the languages in the average gap between turns, within a range of 250 ms from the cross-language mean. We believe that a natural sensitivity to these tempo differences leads to a subjective perception of dramatic or even fundamental differences as offered in ethnographic reports of conversational style. Our empirical evidence suggests robust human universals in this domain, where local variations are quantitative only, pointing to a single shared infrastructure for language use with likely ethological foundations.


Frontiers in Human Neuroscience | 2009

Brain Mechanisms Underlying Human Communication

Matthijs Leendert Noordzij; Sarah E. Newman-Norlund; Jan de Ruiter; Peter Hagoort; Stephen C. Levinson; Ivan Toni

Human communication has been described as involving the coding-decoding of a conventional symbol system, which could be supported by parts of the human motor system (i.e. the “mirror neurons system”). However, this view does not explain how these conventions could develop in the first place. Here we target the neglected but crucial issue of how people organize their non-verbal behavior to communicate a given intention without pre-established conventions. We have measured behavioral and brain responses in pairs of subjects during communicative exchanges occurring in a real, interactive, on-line social context. In two fMRI studies, we found robust evidence that planning new communicative actions (by a sender) and recognizing the communicative intention of the same actions (by a receiver) relied on spatially overlapping portions of their brains (the right posterior superior temporal sulcus). The response of this region was lateralized to the right hemisphere, modulated by the ambiguity in meaning of the communicative acts, but not by their sensorimotor complexity. These results indicate that the sender of a communicative signal uses his own intention recognition system to make a prediction of the intention recognition performed by the receiver. This finding supports the notion that our communicative abilities are distinct from both sensorimotor processes and language abilities.


Journal of Nonverbal Behavior | 2001

Computer animated movement and person perception: Methodological advances in nonverbal behavior research

Gary Bente; Nicole C. Krämer; Anita Petersen; Jan de Ruiter

Impression effects of videotaped dyadic interactions were compared with 3D-computer animations based on movement transcripts of the same interactions to determine whether similar effects could be obtained. One minute sequences of movement behavior taken from three different dyadic interactions were transcribed using the Bernese Coding System (BCS). Descriptive data were converted into animation scripts for professional animation software. Original video documents and computer animations were shown to separate groups of observers and their socio-emotional impressions were assessed on a standard adjective checklist. Only marginal differences were found between the two presentation modes. On the contrary, the data point to remarkable similarities in the impression ratings in both conditions, indicating that most of the relevant social information available to observers in the video recordings was also conveyed by computer animations. Overall, the data suggest that the systematic use of computer animation techniques in nonverbal research deserves further scientific attention.


text speech and dialogue | 2004

Durational Aspects of Turn-Taking in Spontaneous Face-to-Face and Telephone Dialogues

Louis ten Bosch; Nelleke Oostdijk; Jan de Ruiter

On the basis of two-speaker spontaneous conversations, it is shown that the distributions of both pauses and speech-overlaps of telephone and face-to-face dialogues have different statistical properties. Pauses in a face-to-face dialogue last up to 4 times longer than pauses in telephone conversations in functionally comparable conditions. There is a high correlation (0.88 or larger) between the average pause duration for the two speakers across face-to-face dialogues and telephone dialogues. The data provided form a first quantitative analysis of the complex turn-taking mechanism evidenced in the dialogues available in the 9-million-word Spoken Dutch Corpus.


Frontiers in Psychology | 2012

Prediction of turn-ends based on anticipation of upcoming words

Lilla Magyari; Jan de Ruiter

During conversation listeners have to perform several tasks simultaneously. They have to comprehend their interlocutor’s turn, while also having to prepare their own next turn. Moreover, a careful analysis of the timing of natural conversation reveals that next speakers also time their turns very precisely. This is possible only if listeners can predict accurately when the speaker’s turn is going to end. But how are people able to predict when a turn-ends? We propose that people know when a turn-ends, because they know how it ends. We conducted a gating study to examine if better turn-end predictions coincide with more accurate anticipation of the last words of a turn. We used turns from an earlier button-press experiment where people had to press a button exactly when a turn-ended. We show that the proportion of correct guesses in our experiment is higher when a turn’s end was estimated better in time in the button-press experiment. When people were too late in their anticipation in the button-press experiment, they also anticipated more words in our gating study. We conclude that people made predictions in advance about the upcoming content of a turn and used this prediction to estimate the duration of the turn. We suggest an economical model of turn-end anticipation that is based on anticipation of words and syntactic frames in comprehension.


Topics in Cognitive Science | 2012

The Interplay Between Gesture and Speech in the Production of Referring Expressions: Investigating the Tradeoff Hypothesis

Jan de Ruiter; Adrian Bangerter; Paula Dings

The tradeoff hypothesis in the speech-gesture relationship claims that (a) when gesturing gets harder, speakers will rely relatively more on speech, and (b) when speaking gets harder, speakers will rely relatively more on gestures. We tested the second part of this hypothesis in an experimental collaborative referring paradigm where pairs of participants (directors and matchers) identified targets to each other from an array visible to both of them. We manipulated two factors known to affect the difficulty of speaking to assess their effects on the gesture rate per 100 words. The first factor, codability, is the ease with which targets can be described. The second factor, repetition, is whether the targets are old or new (having been already described once or twice). We also manipulated a third factor, mutual visibility, because it is known to affect the rate and type of gesture produced. None of the manipulations systematically affected the gesture rate. Our data are thus mostly inconsistent with the tradeoff hypothesis. However, the gesture rate was sensitive to concurrent features of referring expressions, suggesting that gesture parallels aspects of speech. We argue that the redundancy between speech and gesture is communicatively motivated.


Psychological Science | 2010

A dissociation between linguistic and communicative abilities in the human brain

Roel M. Willems; Miriam de Boer; Jan de Ruiter; Matthijs Leendert Noordzij; Peter Hagoort; Ivan Toni

Although language is an effective vehicle for communication, it is unclear how linguistic and communicative abilities relate to each other. Some researchers have argued that communicative message generation involves perspective taking (mentalizing), and—crucially—that mentalizing depends on language. We employed a verbal communication paradigm to directly test whether the generation of a communicative action relies on mentalizing and whether the cerebral bases of communicative message generation are distinct from parts of cortex sensitive to linguistic variables. We found that dorsomedial prefrontal cortex, a brain area consistently associated with mentalizing, was sensitive to the communicative intent of utterances, irrespective of linguistic difficulty. In contrast, left inferior frontal cortex, an area known to be involved in language, was sensitive to the linguistic demands of utterances, but not to communicative intent. These findings show that communicative and linguistic abilities rely on cerebrally (and computationally) distinct mechanisms.


Journal of Cognitive Neuroscience | 2014

Early anticipation lies behind the speed of response in conversation

Lilla Magyari; Marcel C. M. Bastiaansen; Jan de Ruiter; Stephen C. Levinson

RTs in conversation, with average gaps of 200 msec and often less, beat standard RTs, despite the complexity of response and the lag in speech production (600 msec or more). This can only be achieved by anticipation of timing and content of turns in conversation, about which little is known. Using EEG and an experimental task with conversational stimuli, we show that estimation of turn durations are based on anticipating the way the turn would be completed. We found a neuronal correlate of turn-end anticipation localized in ACC and inferior parietal lobule, namely a beta-frequency desynchronization as early as 1250 msec, before the end of the turn. We suggest that anticipation of the others utterance leads to accurately timed transitions in everyday conversations.


Behavior Research Methods | 2010

Eyetracking for two-person tasks with manipulation of a virtual world.

Jean Carletta; Robin L. Hill; Craig Nicol; Tim Taylor; Jan de Ruiter; Ellen Gurman Bard

Eyetracking facilities are typically restricted to monitoring a single person viewing static images or prerecorded video. In the present article, we describe a system that makes it possible to study visual attention in coordination with other activity during joint action. The software links two eyetracking systems in parallel and provides an on-screen task. By locating eye movements against dynamic screen regions, it permits automatic tracking of moving on-screen objects. Using existing SR technology, the system can also cross-project each participant’s eyetrack and mouse location onto the other’s on-screen work space. Keeping a complete record of eyetrack and on-screen events in the same format as subsequent human coding, the system permits the analysis of multiple modalities. The software offers new approaches to spontaneous multimodal communication: joint action and joint attention. These capacities are demonstrated using an experimental paradigm for cooperative on-screen assembly of a two-dimensional model. The software is available under an open source license.


Psychological Science | 2008

Recalibrating Color Categories Using World Knowledge

Holger Mitterer; Jan de Ruiter

When the perceptual system uses color to facilitate object recognition, it must solve the color-constancy problem: The light an object reflects to an observers eyes confounds properties of the source of the illumination with the surface reflectance of the object. Information from the visual scene (bottom-up information) is insufficient to solve this problem. We show that observers use world knowledge about objects and their prototypical colors as a source of top-down information to improve color constancy. Specifically, observers use world knowledge to recalibrate their color categories. Our results also suggest that similar effects previously observed in language perception are the consequence of a general perceptual process.

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Ivan Toni

Radboud University Nijmegen

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Sarah E. Newman-Norlund

F.C. Donders Centre for Cognitive Neuroimaging

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