Effects of vertically aligned flankers during sentence reading.

We examine whether information lying above and below a line of text being read can impact on reading fluency. We did so by placing length-matched flankers above and below each word in a sequence of words. We found that identical flankers facilitated sentence reading, compared with syntactically correct different text flankers, in both reading-for-meaning (Experiment 1) and grammatical decisions (Experiment 2). Experiment 3 replicated the same text facilitation in grammatical decisions and found no significant difference between different word and nonword distractors. Experiment 4 tested for an impact of case matching across targets and flankers and found a significantly greater same text facilitation when targets and flankers were in the same case. These results suggest that the same text facilitation effect might well be driven by crowding mechanisms that are more sensitive to vertically aligned information when reading horizontally aligned text. (PsycInfo Database Record (c) 2024 APA, all rights reserved).

When phonological neighbours cooperate during spoken sentence processing.

This study examined for the first time the impact of the presence of a phonological neighbour on word recognition when the target word and its neighbour co-occur in a spoken sentence. To do so, we developed a new task, the verb detection task, in which participants were instructed to respond as soon as they detected a verb in a sequence of words, thus allowing us to probe spoken word recognition processes in real time. We found that participants were faster at detecting a verb when it was phonologically related to the preceding noun than when it was phonologically unrelated. This effect was found with both correct sentences (Experiment 1) and with ungrammatical sequences of words (Experiment 2). The effect was also found in Experiment 3 where adjacent phonologically related words were included in the non-verb condition (i.e., word sequences not containing a verb), thus ruling out any strategic influences. These results suggest that activation persists across different words during spoken sentence processing such that processing of a word at position n + 1 benefits from the sublexical phonology activated during processing of the word at position n. We discuss how different models of spoken word recognition might be able (or not) to account for these findings.

The impact of atypical text presentation on transposed-word effects.

When asked to decide if an ungrammatical sequence of words is grammatically correct or not, readers find it more difficult to do so (longer response times (RTs) and more errors) if the ungrammatical sequence is created by transposing two words from a correct sentence (e.g., the white was cat big) compared with matched ungrammatical sequences where transposing two words does not produce a correct sentence (e.g., the white was cat slowly). Here, we provide a further exploration of transposed-word effects when reading unspaced text in Experiment 1, and when reading from right-to-left ("backwards" reading) in Experiment 2. We found significant transposed-word effects in error rates but not in RTs, a pattern previously found in studies using a one-word-at-a-time sequential presentation. We conclude that the absence of transposed-word effects in RTs in the present study and prior work is due to that atypical nature of the way that text was presented. Under the hypothesis that transposed-word effects at least partly reflect a certain amount of parallel word processing during reading, we further suggest that the ability to process words in parallel would require years of exposure to text in its regular format.

Readers use word length information to determine word order.

It is assumed by the OB1-reader model that activated words are flexibly associated with spatial locations. Supporting this notion, recent studies show that readers can confuse the order of words. As word position coding is assumed to rely, among other things, on low-level visual cues, OB1 predicts that it must be harder to determine the order of words when these are of equal length, and consequently, that it is more difficult to read uniform word length sentences. Here we review recent evidence, obtained by our peers, in line with this prediction. We additionally report an analysis of eye-movement data from the GECO corpus, replicating the phenomenon in a natural reading setting, and an experiment revealing a negative impact of length uniformity in a grammatical decision task. By virtue of the spatiotopic sentence-level representation, OB1-reader is currently the only model of reading to account for these behaviors. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

Parallel word reading revealed by fixation-related brain potentials.

During reading, the brain is confronted with many relevant objects at once. But does lexical processing occur for multiple words simultaneously? Cognitive science has yet to answer this prominent question. Recently it has been argued that the issue warrants supplementing the field's traditional toolbox (response times, eye-tracking) with neuroscientific techniques (EEG, fMRI). Indeed, according to the OB1-reader model, upcoming words need not impact oculomotor behavior per se, but parallel processing of these words must nonetheless be reflected in neural activity. Here we combined eye-tracking with EEG, time-locking the neural window of interest to the fixation on target words in sentence reading. During these fixations, we manipulated the identity of the subsequent word so that it posed either a syntactically legal or illegal continuation of the sentence. In line with previous research, oculomotor measures were unaffected. Yet, syntax impacted brain potentials as early as 100 ms after the target fixation onset. Given the EEG literature on syntax processing, the presently observed timings suggest parallel word reading. We reckon that parallel word processing typifies reading, and that OB1-reader offers a good platform for theorizing about the reading brain.

Effects of alternating letter case on processing sequences of written words.

In three grammatical decision experiments, we examined the impact of alternating letter case on sentence reading to determine the locus of case-alternation effects. Experiments 1 and 2 compared grammatical decision responses ("Is this a grammatically correct sequence of words or not?") in three different conditions: (1) SAME CASE/same case; (2) alternating CASE between WORDS; and (3) aLterNaTing cAsE wItHin WoRdS. For the grammatically correct sequences, we observed significantly faster responses in the same-case conditions compared with the between-word case manipulation, as well as a significant advantage for the between-word condition compared with within-word alternating case. These results confirm that case-alternation deteriorates sentence reading, but more so at the level of single word processing (within-word alternation) than at the sentence level (between-word alternation). Experiment 3 demonstrated that between-word case-alternation facilitates sentence processing compared with an all-lowercase condition when betweenWORDspacesAREremoved. Therefore, in the absence of between-word spacing, case changes across words facilitate sentence processing, possibly by guiding readers' eyes to optimal locations for word identification.

Effects of consonant-vowel status on transposed-phoneme priming.

Nonwords created by transposing two phonemes of auditory words (e.g., /buʒãle/) are more effective primes for the corresponding base word target (/bulãʒe/) than nonword primes created by substituting two phonemes (e.g., /buvãʀe/). In one in-lab experiment and one online experiment using the short-term phonological priming paradigm, here, we examine the role of vowels and consonants in driving transposed-phoneme priming effects. Results showed that facilitatory transposed-phoneme priming occurs when the transposed phonemes are consonants (/buʒãle/-/bulãʒe/; /lubãʒe/-/bulãʒe/), but not when they are vowels (/bãluʒe/-/bulãʒe/; /buleʒã/-/bulãʒe/). These results add to existing findings showing differences in the processing of vowels and consonants during spoken and visual word recognition. We suggest that differences in the speed of processing of consonants and vowels combined with differences in the amount of information provided by consonants and vowels relative to the identity of the word being recognized provide a complete account of the present findings.

Rime Priming Effects in Spoken Word Recognition.

In this study, we re-examined the facilitation that occurs when auditorily presented monosyllabic primes and targets share their final phonemes, and in particular the rime (e.g., /vɔʀd/-/kɔʀd/). More specifically, we asked whether this rime facilitation effect is also observed when the two last consonants of the rime are transposed (e.g., /vɔʀd/-/kɔʀd/). In comparison to a control condition in which the primes and the targets were unrelated (e.g., /pylt/-/kɔʀd/), we found significant priming effects in both the rime (/vɔdʀ/-/kɔʀd/) and the transposed-phoneme "rime" /vɔdʀ/-/kɔʀd/ conditions. We also observed a significantly greater priming effect in the former condition than in the latter condition. We use the theoretical framework of the TISK model (Hannagan et al., 2013) to propose a novel account of final overlap phonological priming in terms of activation of both position-independent phoneme representations and bi-phone representations.

Transposed-word effects in speeded grammatical decisions to sequences of spoken words.

We used the grammatical decision task (a speeded version of the grammaticality judgment task) with auditorily presented sequences of five words that could either form a grammatically correct sentence or an ungrammatical sequence. The critical ungrammatical sequences were either formed by transposing two adjacent words in a correct sentence (transposed-word sequences: e.g., "The black was dog big") or were matched ungrammatical sequences that could not be resolved into a correct sentence by transposing any two words (control sequences: e.g., "The black was dog slowly"). These were intermixed with an equal number of correct sentences for the purpose of the grammatical decision task. Transposed-word sequences were harder to reject as being ungrammatical (longer response times and more errors) relative to the ungrammatical control sequences, hence attesting for the first time that transposed-word effects can be observed in the spoken language version of the grammatical decision task. Given the relatively unambiguous nature of the speech input in terms of word order, we interpret these transposed-word effects as reflecting the constraints imposed by syntax when processing a sequence of spoken words in order to make a speeded grammatical decision.

Transposed-word effects when reading serially.

When asked to decide if an ungrammatical sequence of words is grammatically correct or not readers find it more difficult to do so (longer response times (RTs) and more errors) if the ungrammatical sequence is created by transposing two words from a correct sentence (e.g., the white was cat big) compared with a set of matched ungrammatical sequences for which transposing any two words could not produce a correct sentence (e.g., the white was cat slowly). Here, we provide a further exploration of transposed-word effects while imposing serial reading by using rapid serial visual presentation (RSVP) in Experiments 1 (respond at the end of the sequence) and 2 (respond as soon as possible-which could be during the sequence). Crucially, in Experiment 3 we compared performance under serial RSVP conditions with parallel presentation of the same stimuli for the same total duration and with the same group of participants. We found robust transposed-word effects in the RSVP conditions tested in all experiments, but only in error rates and not in RTs. This contrasts with the effects found in both errors and RTs in our prior work using parallel presentation, as well as the parallel presentation conditions tested in Experiment 3. We provide a tentative account of why, under conditions that impose a serial word-by-word reading strategy, transposed-word effects are only seen in error rates and not in RTs.

Effects of letter case on processing sequences of written words.

In four experiments, we investigated the impact of letter case (lower case vs. UPPER CASE) on the processing of sequences of written words. Experiment 1 used the rapid parallel visual presentation (RPVP) paradigm with postcued identification of one word in a five-word sequence. The sequence could be grammatically correct (e.g., "the boy likes his bike") or be an ungrammatical reordering of the same words (e.g., "his boy the bike likes the"). We replicated the standard sentence superiority effect (more accurate identification of target words when embedded in a grammatically correct sequence compared with ungrammatical sequences), and also found that lowercase presentation led to higher word identification accuracy, but equally so for the grammatical and ungrammatical sequences. This pattern suggests that the lowercase advantage was mostly operating at the level of individual word identification. The following three experiments used the grammatical decision task to provide an examination of letter case effects on more global sentence processing measures. All these experiments revealed a significant lowercase advantage in grammatical decisions, independently of the nature of the ungrammatical sequence (Experiments 2 and 3) and independently of whether or not the letter case manipulation was blocked (Experiment 4). The size of the effects observed in grammatical decisions again points to individual word identification as the primary locus of the lowercase advantage. We conclude that letter case mainly affects early visuo-orthographic processing and access to case-independent letter and word identities. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

A transposed-word effect on word-in-sequence identification.

The present study investigated transposed-word effects in a post-cued word-in-sequence identification experiment. Five horizontally aligned words were simultaneously presented for a brief duration and followed by a backward mask and cue for the position of the word to be identified within the sequence. The five-word sequences could form a grammatically correct sentence (e.g., The boy can run fast), an ungrammatical transposed-word sequence (e.g., The can boy run fast) or an ungrammatical control sequence (e.g., The can get run fast), and the same target word at the same position (e.g., the word 'run') was tested in the three conditions. Consistent with previous studies using a grammatical decision task and a same-different matching task, a transposed-word effect was observed, with word identification being more accurate in transposed-word sequences than in control sequences. Furthermore, here we could show for the first time that word identification was more accurate in correct sentences compared with transposed-word sequences. We suggest that the word identification advantage found for transposed-word sequences compared with ungrammatical control sequences is due to facilitatory feedback to word identities from sentence-level representations, albeit with less strength compared to the feedback provided by correct sentences.

Investigating the locus of transposed-phoneme effects using cross-modal priming.

In this study, we examined whether the facilitatory priming effect found when auditory primes and targets are related by a phoneme transposition (e.g., /ʀͻb/-/bͻʀ/: Dufour & Grainger, 2019, 2020) is also observed under cross-modal presentation. In two experiments using the same materials as in the previous studies, we found no evidence for a facilitatory priming effect when the targets were presented visually rather than auditorily. On the contrary, an inhibitory priming effect was found when both unrelated words (Experiment 1; e.g., /mas/-/bͻR/) and vowel overlap words (Experiment 2; e.g., /vͻl/-/bͻʀ/) were used as control conditions. In Experiment 2, this inhibitory effect was found to be equivalent in size whether the target words were of higher or lower frequency than the prime words (e.g. /ʀͻb/-/bͻʀ/ vs. /bͻʀ/-/ʀͻb/). We interpret this pattern of effects as reflecting the greater impact of word-level inhibition in cross-modal priming, and the parallel influence of prime-target relative frequency on bottom-up phoneme-to-word facilitation and word-level inhibition. Therefore, the facilitatory priming effect previously observed with auditory primes and targets would mainly reflect bottom-up activation of the target word representation during prime word processing.

Fast priming of grammatical decisions: repetition and transposed-word priming effects.

We used the grammatical decision task to investigate fast priming of written sentence processing. Targets were sequences of 5 words that either formed a grammatically correct sentence or were ungrammatical. Primes were sequences of 5 words and could be the same word sequence as targets, a different sequence of words with a similar syntactic structure, the same sequence with two inner words transposed or the same sequence with two inner words substituted by different words. Prime-word sequences were presented in a larger font size than targets for 200 ms and followed by the target sequence after a 100 ms delay. We found robust repetition priming in grammatical decisions, with same sequence primes leading to faster responses compared with prime sequences containing different words. We also found transposed-word priming effects, with faster responses following a transposed-word prime compared with substituted-word primes. We conclude that fast primed grammatical decisions might offer investigations of written sentence processing what fast primed lexical decisions have offered studies of visual word recognition.

Sequential versus simultaneous presentation of memoranda in verbal working memory: (How) does it matter?

To-be-memorized information in verbal working memory (WM) can be presented sequentially, like in oral language, and simultaneously, like in written language. Few studies have addressed the importance and implications for verbal WM processing of these two presentation modes. While sequential presentation may favor discrete, temporal encoding processes, simultaneous presentation may favor spatial encoding processes. We compared immediate serial recall tasks for sequential versus simultaneous word list presentation with a specific focus on serial position curves of recall performance, transposition gradients, and the nature of serial order errors. First, we observed higher recall performance in the simultaneous compared to the sequential conditions, with a particularly large effect at end-of-list items. Moreover, results showed more transposition errors between non-adjacent items for the sequential condition, as well as more omission errors especially for start-of-list items. This observation can be explained in terms of differences in refreshing opportunities for start-of-list items during encoding between conditions. This study shows that the presentation mode of sequential material can have a significant impact on verbal WM performance, with an advantage for simultaneous encoding of sequence information.

As time goes by: Space-time compatibility effects in word recognition.

The processing of time activates a spatial left-to-right mental timeline, where past events are "located" to the left and future events to the right. If past and future words activate this mental timeline, then the processing of such words should interfere with hand movements that go in the opposite direction. To test this hypothesis, we conducted 3 visual lexical decision tasks with conjugated (past/future) verbs and pseudoverbs. In Experiment 1, participants moved a pen to the right or left of a trackpad to indicate whether a visual stimulus was a real word or not. Grammatical time and hand movements for yes responses went in the same direction in the congruent condition (e.g., past tense/leftward movement) but in opposite directions in the incongruent condition. Analyses showed that space-time incongruency significantly increased reaction times. In Experiment 2, we investigated the role of movement in this effect. Participants performed the same task by responding with a trackpad or a mouse, both of which required lateral movement through space, or a static keypress. We again obtained the space-time congruency effect, but only when the decision required movement through space. In Experiments 1 and 2, stimuli were preceded by a temporal prime. In Experiment 3, participants performed the same task without any prime. Results replicated the congruency effect, demonstrating that it does not depend upon temporal word priming. Altogether, results suggest automatic activation of a left-right mental timeline during word recognition, reinforcing the claim that the concept of Time is grounded in movement through space. (PsycInfo Database Record (c) 2022 APA, all rights reserved).

Orthographic relatedness and transposed-word effects in the grammatical decision task.

In two on-line experiments (N = 386) we asked participants to make speeded grammatical decisions to a mixture of syntactically correct sentences and ungrammatical sequences of words. In Experiment 1, the ungrammatical sequences were formed by transposing two inner words in a correct sentence (e.g., the brave daunt the wind / the daunt brave the wind), and we manipulated the orthographic relatedness of the two transposed words (e.g., the brave brace the wind / the brace brave the wind). We found inhibitory effects of orthographic relatedness in decisions to both the correct sentences and the ungrammatical transposed-word sequences. In Experiment 2, we further investigated the impact of orthographic relatedness on transposed-word effects by including control ungrammatical sequences that were matched to the transposed-word sequences. We replicated the inhibitory effects of orthographic relatedness on both grammatical and ungrammatical decisions and found that transposed-word effects were not influenced by this factor. We conclude that orthographic relatedness across adjacent words impacts on processes involved in parallel word identification for sentence comprehension, but not on the association of word identities to positions in a sequence.

The contribution of semantics to the sentence superiority effect.

When a sequence of written words is presented briefly and participants are asked to report the identity of one of the words, identification accuracy is higher when the words form a correct sentence. Here we examined the extent to which this sentence superiority effect can be modulated by semantic content. The central hypothesis guiding this study is that the sentence superiority effect is primarily a syntactic effect. We therefore predicted little or no modulation of the effect by semantics. The influence of semantic content was measured by comparing the sentence superiority effect obtained with semantically regular sentences (e.g., son amie danse bien [her friend dances well]) and semantically anomalous but syntactically correct sentences (e.g., votre sac boit gros [your bag drinks big]), with effects being measured against ungrammatical scrambled versions of the same words in both cases. We found sentence superiority effects with both types of sentences, and a significant interaction, such that the effects were greater with semantically regular sentences compared with semantically anomalous sentences. We conclude that sentence-level semantic information can constrain word identities under parallel word processing, albeit with less impact than that exerted by syntax.

Single Word Reading in the Real World: Effects of Transposed-Letters.

We investigated single word reading in a context where isolated word presentation is not unusual reading road signs in a simulated car driving situation. Participants had to indicate if the inscription on the road sign was a real word or not (lexical decision). The critical nonwords were created in two ways: by transposing two letters in a real word (e.g., the word Highway becomes Hihgway) or by substituting the same two letters with different letters (Hifpway). The baseword used to create the critical nonword stimuli were either congruent with a driving context (e.g., highway) or incongruent (e.g., garden). Nonwords created by a letter transposition were harder to reject as such compared with letter substitution nonwords a transposed-letter effect. The effect of baseword congruency was not significant and did not interact with the transposed-letter effect.

Do you want /ʃoloka/ on a /bistɔk/? On the scope of transposed-phoneme effects with non-adjacent phonemes.

We conducted two lexical decision experiments and one replication study to examine the scope of transposed-phoneme effects when the transposition involves non-adjacent phonemes. The critical stimuli were non-words derived from a real word (the base-word) either by transposing two phonemes or by substituting the same phonemes with different phonemes. In Experiment 1, the transposed phonemes belonged either to the same syllable (e.g. /bis.tɔk/ for the French base-word /bis.kɔt/) or to a different syllable (e.g. /ʃo.lo.ka/ for the French base-word /ʃo.ko.la/) and were located either at the beginning of the speech signal (e.g. /sib.kɔt/ for /bis.kɔt/; /ko.ʃo.la/ for /ʃo.ko.la/) or at the end (e.g. /bis.tɔk/ for /bis.kɔt/; /ʃo.lo.ka/ for /ʃo.ko.la/). Experiment 2 compared within-syllable and between-syllable transpositions derived from the same set of bi-syllabic base-words (e.g., /sib.kɔt/, /bik.sɔt/, /bis.tɔk/ for the base-word /biskɔt/). In both experiments, we found clear transposed-phoneme effects with longer "no" decisions for transposed-phoneme non-words compared with the matched substituted-phoneme non-words. The effect was of similar magnitude when the transposed phonemes occurred in the same syllable and across different syllables. Also, for both the within- and between-syllable transpositions, the size of the transposed-phoneme effect did not vary as a function of the position of the transposition. Overall, our results suggest that phonemes can migrate across their respective positions not only within a syllable, but also across syllables. More importantly, they also suggest that position-independent phonemes exert a continuous influence during the entire processing of the auditory stimulus to the extent that there is sufficient time for this influence to manifest itself.