Distractor Words Research Articles

Effects of Implicit and Explicit Instruction on Morphological Awareness and Knowledge

In the present study, we explored how implicit and explicit learning affects L2 learners’ morphological awareness and knowledge. To this end, 10th grade high school students (N = 170) in Korea were assigned to one of the three conditions: implicit learning, explicit learning, and control. Participants in the implicit condition learned the meaning of derivatives containing target derivational morphemes (e.g,, sub-) and distractor words, whereas their counterparts in the explicit condition learned the same lexical items and also received morphological instructions. Next, morphological awareness and knowledge was measured by using one- and seven-week delayed post-tests. Overall results revealed superiority of explicit learning over the other two conditions in all post-tests. Results also revealed that although implicit learning may enhance morphological awareness and knowledge to a statistically significant degree, the magnitude of effects computed by Cohen’s d showed small or medium-sized effects. Given that the present study is the first to explore the impact of implicit and explicit learning on morphological awareness and knowledge in EFL settings, the present findings may make important contributions to current second language acquisition literature.

The effect of time pressure and semantic relatedness in spoken word production: A topographic ERP study

Speaking involves information-universal and information-specific systems, and it remains unknown about the influence of two systems in spoken word production. We manipulated time pressure (with and without) as an information-universal factor and the semantic relatedness between target names and distractor words (semantically related and unrelated) as an information-specific factor in the picture-word interference (PWI) task, while electrophysiological signals were measured concurrently. Naming latencies showed a significant semantic interference effect in the condition without time pressure but none in the condition with time pressure. Spatio-temporal segmentation analysis indicated that time pressure only prolonged the duration of Map 4 ranging from about 250–350 ms post picture presentation, and meanwhile shortened the duration of Map 5 starting around 350–520 ms. Within the framework of serial models, the two time periods were presumably associated with lexical selection and phonological encoding in spoken word production. Cluster-based permutation analysis revealed that semantic relatedness modulated ERPs around 320−360 ms after picture onset in the condition without time pressure, while 530−570 ms in the condition with time pressure. Our findings reveal that time pressure prolongs lexical selection and shortens phonological encoding. Furthermore, time pressure dynamically modulates whether semantically related distractors exceed a competition threshold to interfere with target word selection.

The lexical nature of alpha-beta oscillations in context-driven word production

Abstract In context-driven word production, picture naming is faster following constrained than neutral sentential contexts (e.g., “The farmer milked the… [picture]” vs. “The child drew a… [picture]”, followed by the picture of a cow), suggesting conceptual-lexical pre-activation of the target response. Power decreases in the alpha-beta oscillatory band (8–25 Hz) are consistently found for constrained relative to neutral contexts prior to picture onset, when conceptual and lexical retrieval is ongoing. However, it remains a matter of debate whether the alpha-beta power decreases reflect (low-level) expectations of the visual input, conceptual and lexical retrieval, or motor preparation. The present study aimed at investigating the lexical-semantic nature of alpha-beta oscillations. Participants performed context-driven picture naming with constrained and neutral contexts. In addition, an auditory distractor word was presented before picture onset. Distractors were either semantically related (e.g., “goat”) or unrelated (e.g., “bean”) to the picture to be named. Picture naming was faster with constrained than neutral contexts. Distractor type did not affect naming latencies nor the behavioural context effect. In the oscillatory brain responses, the context-related alpha-beta power decreases were observed throughout the pre-picture interval when distractors were semantically unrelated to the picture, in line with previous findings. However, with semantically related distractors, the context effect was delayed until a period after distractor processing. Thus, alpha-beta power seems to be sensitive to the semantic relationship between the distractor word and the picture to be named. We interpret these results as suggesting that alpha-beta power decreases in context-driven word production reflect lexical-semantic retrieval mechanisms.

Pragmatic constraints do not prevent the co-activation of alternative names: evidence from sequential naming tasks with one and two speakers

ABSTRACT We investigated whether the phonological co-activation of alternative names in picture naming (e.g. “fish” for target “shark”) is reduced by contextual constraints which render them inappropriate. In the constraining context, the target naming response was preceded by a naming response to an object from the same category (e.g. an eel) which remained visible during target naming. Therefore, use of the alternative target name “fish” would result (a) in an ambiguous response because of the visual context and (b) in a pragmatically odd response because of the previous naming response. In Experiment 1 the context pictures were named by the participants themselves and in Experiment 2 by a communication partner. In both experiments, interference from distractor words phonologically related (“finger”) versus unrelated (“book”) to the alternative name was observed regardless of context. This finding indicates limited flexibility in lexical activation during speech planning.

Stroop-like effects of derived stimulus-stimulus relations.

Automaticity can be established by consistently reinforcing contingencies during practice. During reinforcement learning, however, new relations can also be derived, which were never directly reinforced. For instance, reinforcing the overlapping contingencies A → B and A → C, can lead to a new relation B-C, which was never directly reinforced. Across 5 experiments we investigated if such derived relations can also induce automatic effects. We first trained participants to derive a relation between a nonsense word and a color word, and then used the nonsense words as distractors in a Stroop task. Results indicate that derived color-word associates induce Stroop effects. This effect, however, is present only when sufficient attention is allocated to the distractor words during the Stroop task, and is driven by a response conflict. We conclude that, under the present training conditions, derived color-word associates became related to the corresponding color word at the lexical level, but did not gain direct access to the corresponding semantic color representation. (PsycINFO Database Record (c) 2020 APA, all rights reserved).

Semantic interference in the picture-word interference task: Is there a pre-lexical, conceptual contribution to the effect?

Picture naming takes longer in the presence of a semantic-categorically related distractor word compared to an unrelated distractor word. This semantic interference effect in the picture-word interference (PWI) task is an empirical cornerstone in speech production research and of central importance in theory development and evaluation. Prominent models locate the effect at an abstract lexical level, yet only few studies have tested for a possible pre-lexical, conceptual contribution. Moreover, those studies that did are not conclusive. We re-explored the locus of semantic interference by contrasting two task versions that were implemented in as parallel a fashion as possible, but differed with respect to the processing stages involved: naming pictures (requiring conceptual processing and lexical processing) and deciding on their natural size (requiring conceptual processing only). We predicted semantic interference in naming, replicating the standard effect. If part of the effect is localized at the conceptual level, we predicted interference in size decision, too. We found semantic effects in both tasks but with different polarity - interference in naming and facilitation in size decision. This pattern supports the view that semantic interference in PWI has its locus at the lexical level and its origin at the conceptual level.

Neural Correlates of True and False Recognition Memory for Socially Relevant Information in Schizophrenia

Abstract Individuals with schizophrenia (SZ) demonstrate poor recognition memory, even when information is socially relevant. The neural alterations associated with responses to old information that is accurately recognized (true recognition) vs new information inaccurately identified as old (false recognition) are not known. Twenty SZ patients and 16 healthy controls performed a recognition paradigm during functional magnetic resonance imaging (fMRI) using 78 learned target and 78 new distractor words (all socially relevant trait adjectives). Participants were asked to indicate whether they had seen the word before or not. Words were classified according to the subjects’ responses, as hits (true recognition), false alarms (false recognition), correct rejections, or misses and compared for blood-oxygen-level-dependent (BOLD) activation. During hits, patients with SZ and controls showed similar BOLD activation in expected areas of lateral prefrontal cortex, parietal cortex, and anterior cingulate cortex. During false alarms, controls activated many of the same regions as were activated during hits. In contrast, patients had reduced activation in lateral prefrontal cortex (Brodmann Area, BA, 9, 46), anterior cingulate/paracingulate (BA 24/32, 6), and posterior cingulate cortex (BA 23/31). These results indicate that, compared to controls, patients with SZ exhibit a lack of correspondence between behavior (ie, falsely identifying new items as old) and neural activation patterns (ie, overlap in activation of regions associated with true and false recognition). These findings shed light on the neural mechanisms associated with false recognition memory in SZ.

How a question context aids word production: Evidence from the picture-word interference paradigm.

Difficulties in saying the right word at the right time arise at least in part because multiple response candidates are simultaneously activated in the speaker's mind. The word selection process has been simulated using the picture-word interference task, in which participants name pictures while ignoring a superimposed written distractor word. However, words are usually produced in context, in the service of achieving a communicative goal. Two experiments addressed the questions whether context influences word production, and if so, how. We embedded the picture-word interference task in a dialogue-like setting, in which participants heard a question and named a picture as an answer to the question while ignoring a superimposed distractor word. The conversational context was either constraining or nonconstraining towards the answer. Manipulating the relationship between the picture name and the distractor, we focused on two core processes of word production: retrieval of semantic representations (Experiment 1) and phonological encoding (Experiment 2). The results of both experiments showed that naming reaction times (RTs) were shorter when preceded by constraining contexts as compared with nonconstraining contexts. Critically, constraining contexts decreased the effect of semantically related distractors but not the effect of phonologically related distractors. This suggests that conversational contexts can help speakers with aspects of the meaning of to-be-produced words, but phonological encoding processes still need to be performed as usual.

Syllables are Retrieved before Segments in the Spoken Production of Mandarin Chinese: An ERP Study

Languages may differ in terms of the functional units of word-form encoding used in spoken word production. It is widely accepted that segments are the primary units used in Indo-European languages. However, it is controversial what the functional units (syllables or segments) in Chinese spoken word production are. In the present study, Mandarin Chinese speakers named pictures while ignoring distractor words presented simultaneously, which shared atonal syllables, bodies or rhymes, or were unrelated with the name of the target pictures. Behavioral results showed that naming latencies in the 3 phonologically-related conditions were significantly shorter than those associated with the unrelated condition. EEG data indicated that the syllable-related condition modulated event-related potentials (ERPs) in a time window of 320–500 ms, the body-related condition modulated ERPs from 370–420 ms, while the rhyme-related condition modulated ERPs from 400–450 ms. The starting points for evident syllable, body, and rhyme priming effects were 322 ms, 368 ms, and 408 ms (by the Guthrie & Buchwald method) or 340 ms, 372 ms and 403 ms (by the jackknife procedure), respectively. Our findings provide a relative temporal course of syllable and segment encoding in Chinese spoken naming: Syllables are retrieved before segments, and constitute the primary processing units during the early stage of word-form encoding. Furthermore, segments and their order are retrieved incrementally from left to right when producing Chinese spoken words.

No Negative Priming Effect in the Manual Stroop Task.

The negative priming effect is an increase in interference when the response to the target on the current trial corresponds to the response to the distractor word on a preceding trial. Contrary to the commonly held belief that the negative priming effect is ubiquitous in the Stroop task, in the original study by Neill (1977), negative priming was found only in the oral, and not the manual Stroop task. The present paper makes three empirical observations. First, we replicate the discrepancy in the finding of the negative priming effect in the oral versus manual Stroop tasks tested under identical conditions, where response mode could be the only the causal factor. Second, we point out that previous manual Stroop experiments reporting the negative priming effect confounded the effect of response repetition. Third, we report the analysis of the negative priming effect at the level of whole RT distribution, which revealed that the effect was absent throughout the RT distribution in the manual task, and it was of constant size across the RT distribution in the oral task. Implications of the results for conflict control in the Stroop task is discussed.

Prediction of orthographic information during listening comprehension: A printed-word visual world study.

Two visual world eye-tracking experiments examined the role of orthographic information in the visual context in pre-activation of orthographic and phonological information using Japanese. Participants heard sentences that contained a predictable target word and viewed a display showing four words in a logogram, kanji (Experiment 1) or in a phonogram, hiragana (Experiment 2). The four words included either the target word (e.g., /sakana/; fish), an orthographic competitor (e.g., /tuno/; horn), a phonological competitor (e.g., /sakura/; cherry blossom), or an unrelated word (e.g., /hon/; book), together with three distractor words. The orthographic competitor was orthographically or phonologically dissimilar to the target in hiragana. In Experiment 1, target and orthographic competitor words attracted more fixations than unrelated words before the target word was mentioned, suggesting that participants pre-activated orthographic form of the target word. In Experiment 2, target and phonological competitor words attracted more predictive fixations than unrelated words, but orthographic competitor words did not, suggesting a critical role of the visual context. This pre-activation pattern does not fit with the pattern of lexical activation in auditory word recognition, where orthography and phonology interact. However, it is compatible with the pattern of lexical activation in spoken word production, where orthographic information is not automatically activated, in line with production-based prediction accounts.

Repetition priming and repetition blindness: Effects of an intervening distractor word.

In a simplified repetition blindness (RB) paradigm, university students named target words (C2) that were presented for 72 ms and followed by a pattern mask. A prime word (C1) that was identical or unrelated to the target was read silently at the beginning of each trial, and there was an intervening distractor item displayed for 120 ms between prime and target. When the distractor was a word, there was a large repetition cost for target accuracy at both prime durations (Experiments 1A and 1B). The cost with word distractors was not abolished when instructions about repeats were given (Experiments 2A and 2B). When the distractor was selected from a set of random-letter strings, there was a repetition benefit in target accuracy for a 120-ms prime and no effect for a 480-ms prime (Experiments 3A and 3B). The cost of distractor lexicality implicates competitive effects in event registration and ordering. (PsycINFO Database Record (c) 2019 APA, all rights reserved).

Phonological picture-word interference in language mapping with transcranial magnetic stimulation: an objective approach for functional parcellation of Broca's region.

Functional imaging data suggest different regions for semantic, syntactic, and phonological processing in an anterior-to-posterior direction along the inferior frontal gyrus. Language mapping by use of neuro-navigated transcranial magnetic stimulation (TMS) is frequently applied in clinical research to identify language-related cortical regions. Recently, we proposed a high spatial resolution approach for more detailed language mapping of cortical sub-areas such as Broca's region. Here, we employed a phonological picture-word interference paradigm in healthy subjects to reveal functional specialization in Broca's region for phonological processing. The behavioral phonological priming effect is characterized by accelerated naming responses to target pictures accompanied by phonologically related auditory distractor words. We hypothesized that the inhibitory effects of TMS on language processing would reduce phonological priming only at stimulation sites involved in phonological processing. In active as compared to sham TMS, we found reduced phonological facilitation specifically at sites overlapping with the probabilistic cytoarchitectonic area 44. Our findings complemented functional imaging data by revealing structure-function relationship in Broca's region. The introduction of a reactiontime based interference paradigm into TMS language mapping increases the objectivity of the method and allows to explore functional specificity with high temporal resolution. Findings may help to interpret results in clinical applications.

The closer they are, the more they interfere: Semantic similarity of word distractors increases competition in language production.

Heterogeneous effects of semantic distance in language production have sparked a debate on the central assumption of many language production models, namely that lexical selection is a competitive process. In the present ERP study, we manipulated semantic distance in the picture word interference (PWI) paradigm systematically within taxonomic hierarchies. Target-distractor pairs were either closely related members of the same basic level category, hence sharing many semantic features (e.g., orangutan and gorilla), or distantly related members of the same superordinate category, sharing fewer features (e.g., orangutan and horse). Across related conditions, broad category membership (e.g., animals) was kept constant. Naming times reflected a systematic increase of semantic interference as semantic distance decreased. Early and later ERP modulations related to the semantic distance manipulation were observed at posterior regions starting at 234 ms and with an additional fronto-central cluster starting at 346 ms. Early effects are interpreted as indexing lexical selection while the late effects may reflect an N400-like component. Taking the behavioral and ERP modulations together, these results are in line with models of lexical selection that include an early competitive lexical selection process. (PsycINFO Database Record (c) 2019 APA, all rights reserved).

Early and Late Effects of Semantic Distractors on Electroencephalographic Responses During Overt Picture Naming.

This study investigated the nature of the interference effect of semantically related distractors in the picture-word interference paradigm, which has been claimed to be caused by either competition between lexical representations of target and distractor or by a late response exclusion mechanism that removes the distractor from a response buffer. EEG was recorded while participants overtly named pictures accompanied by categorically related versus unrelated written distractor words. In contrast to previous studies, stimuli were presented for only 250 ms to avoid any re-processing. ERP effects of relatedness were found around 290, 470, 540, and 660 ms post stimulus onset. In addition, related distractors led to an increase in midfrontal theta power, especially from about 440 to 540 ms, as well as to decreased high beta power between 40 and 110 ms and increased high beta power between 275 and 340 ms post stimulus onset. Response-locked analyses showed no differences in ERPs, however increased low and high beta power for related distractors in various time windows, most importantly a high beta power increase between −175 and −155 ms before speech onset. These results suggest that the semantic distractor effect is a combination of various effects and that the lexical competition account and the response exclusion account each capture a part, but not all aspects of the effect.

Adolescents' Developing Sensitivity to Orthographic and Semantic Cues During Visual Search for Words.

Two eye-tracking experiments were conducted to assess the influence of words either looking like the target word (orthographic distractors) or semantically related to the target word (semantic distractors) on visual search for words within lists by adolescents of 11, 13, and 15 years of age. In Experiment 1 (literal search task), participants saw the target word before the search (e.g., “raven”), whereas in Experiment 2 (categorical task) the target word was only defined by its semantic category (e.g., “bird”). In both experiments, participants’ search times decreased from fifth to ninth grade, both because older adolescents gazed less often at non-target words during the search and because they could reject non-target words more quickly once they were fixated. Progress in visual search efficiency was associated with a large increase in word identification skills, which were a strong determinant of average gaze durations and search times for the categorical task, but much less for the literal task. In the literal task, the presence of orthographic or semantic distractors in the list increased search times for all age groups. In the categorical task, the impact of semantic distractor words was stronger than in the literal task because participants needed to gaze at the semantic distractors longer than at the other words before rejecting them. Altogether, the data support the assumption that the progressive automation of word decoding up until the age of 12 and the better quality of older adolescents’ lexical representations facilitate a flexible use of both the perceptual and semantic features of words for top-down guidance within the displays. In particular, older adolescents were better prepared to aim at or reject words without gazing at them directly. Finally, the overall similar progression of the maturation of single word visual search processes and that of more real-life information search within complex verbal documents suggests that the young adolescents’ difficulties in searching the Web effectively could be due to their insufficiently developed lexical representations and word decoding abilities.

Social anxiety enhances recognition of task-irrelevant threat words

Past research is mixed regarding the conditions under which memory biases emerge in individuals with high levels of social anxiety. The current study examined whether high social anxiety would be associated with a memory bias for threatening, but task-irrelevant information, or whether it creates a memory bias for both threatening as well as neutral distractors.60 undergraduate students were recruited, half classified as having high social anxiety and half as having low social anxiety according to the Social Phobia Inventory. Participants memorized a series of sequentially and visually presented target words that were either all neutral (e.g., patient) or all socially threatening (e.g., embarrassed). Simultaneously during encoding, participants also saw a distractor word on each trial that was either neutral or socially threatening. Memory for targets was then assessed using a recall and recognition test. Incidental recall and recognition tests for the distractors were also administered.There were no group differences in memory for threat versus neutral targets. However, recognition of socially threatening distractors was significantly enhanced in those with high relative to low levels of social anxiety, but only when targets were also socially threatening.Memory biases in high social anxiety were shown to be specific for threat-related distractors rather than general, for all distractors. This specific bias for threat emerged only when the to-be-remembered target information was also threatening. Findings suggest that when social anxiety is primed, attention to irrelevant, but socially threatening, information is heightened.

The Shape of Things to Come in Speech Production: A Functional Magnetic Resonance Imaging Study of Visual Form Interference during Lexical Access.

Studies of context effects in speech production have shown that semantic feature overlap produces interference in naming of categorically related objects. In neuroimaging studies, this semantic interference effect is consistently associated with involvement of left superior and middle temporal gyri. However, at least part of this effect has recently been shown to be attributable to visual form similarity, as categorically related objects typically share visual features. This fMRI study examined interference produced by visual form overlap in the absence of a category relation in a picture-word interference paradigm. Both visually similar and visually dissimilar distractors led to increased BOLD responses in the left inferior frontal gyrus compared with the congruent condition. Naming pictures in context with a distractor word denoting an object visually similar in form slowed RTs compared with unrelated words and was associated with reduced activity in the left posterior middle temporal gyrus. This area is reliably observed in lexical level processing during language production tasks. No significant differential activity was observed in areas typically engaged by early perceptual or conceptual feature level processing or in areas proposed to be engaged by postlexical language processes, suggesting that visual form interference does not arise from uncertainty or confusion during perceptual or conceptual identification or after lexical processing. We conclude that visual form interference has a lexical locus, consistent with the predictions of competitive lexical selection models.

The neurobiology of taboo language processing: fMRI evidence during spoken word production

Every language has words deemed to be socially inappropriate or ‘taboo’ to utter. Taboo word production appears prominently in language disorders following brain injury. Yet, we know little about the cognitive and neural mechanisms involved in processing taboo compared to neutral language. In the present study, we introduced taboo distractor words in the picture word interference paradigm during functional magnetic resonance imaging to investigate how these words influence spoken word production. Taboo distractor words significantly slowed picture-naming latencies compared to neutral words. This interference effect was associated with increased blood oxygen level dependent signal across a distributed thalamo-cortical network including bilateral anterior cingulate cortex and left inferior frontal gyrus, left posterior middle temporal gyrus and right thalamus. We interpret our findings as being consistent with an account integrating both domain-general attention-capture/distractor blocking and language-specific mechanisms in processing taboo words during spoken word production.

Positive and negative priming differences between short-term and long-term identity coding of word-specific attentional priorities.

Two experiments investigated positive priming and negative priming effects in a lexical decision task. A priming task was used in which participants were required to make a verbal naming response to a prime target word, flanked by a distractor word, followed by a lexical decision response to a probe target word or nonword, flanked by a distractor word. The longevity of both positive and negative priming was explored in short-lag and long-lag conditions in which stimuli were presented once and only once, except in order to fulfill the priming manipulations. The results showed significant immediate positive priming and negative priming effects, but only negative priming was sustained for over 8 minutes with many intervening trials, whereas there was no evidence of positive priming after the same delay. These intriguing results have implications for the nature of inhibitory processing and differing predictions between inhibition-based and episodic retrieval accounts of priming.