Repetition Effects Research Articles

Please keep ordering! A natural field experiment assessing a carbon label introduction

We conduct a natural field experiment investigating the efficacy of environmental information provision while considering its relationships with individual consumers’ habitual behaviour. A carbon label was introduced to the lowest-emission dish for each food category on the menu of a full-service restaurant; its efficacy was assessed by distinguishing its immediate impact on orders placed by the restaurant’s occasional and regular customers as well as the impact over time for repeated orders. We collected 1,737 customer orders – of which 1,200 were placed by 99 regular customers – taking advantage of an electronic ordering system that identified customers through a unique number. Independently of customer type, we find no immediate effect of the carbon label after its introduction. However, the probability of ordering an environmentally friendly dish increases significantly with repeated exposure and additional orders, albeit with a progressively diminishing effect. We discuss the importance of the repetition effect when assessing a new label, including implications for research and policy.

Two faces of message repetition: audience favorability as a determinant of the explanatory capacities of processing fluency and message fatigue

Abstract This study offers a critical test of two competing theoretical accounts of message repetition effects—processing fluency and message fatigue—which have yet to be examined together under a coherent framework. Furthermore, integrating research on metacognition and motivated processing, we propose audience favorability toward message advocacy as a crucial moderator in this dynamic. A repeated-exposure experiment (N = 845) involving five different messages about climate change mitigation was conducted. Multilevel moderated mediation analyses showed that audience favorability critically moderated the mediational effects of the two mechanisms: For favorable individuals, repeated exposure enhanced persuasion through increased fluency and decreased fatigue. In contrast, for unfavorable individuals, repeated exposure diminished persuasion via increased fatigue and decreased fluency. Collectively, this study demonstrates that message repetition does not have uniform effects on persuasion but rather its effects critically hinge on audience favorability and challenges the fundamental notion that fluency and fatigue necessarily increase with repetition.

Truth by repetition … Without repetition: Testing the effect of instructed repetition on truth judgments.

Past research indicates that people judge repeated statements as more true than new ones. An experiential consequence of repetition that may underly this "truth effect" is processing fluency: Processing statements feels easier following their repetition. In three preregistered experiments (N = 684), we examined the effect of merely instructed repetition (i.e., not experienced) on truth judgments. Experiments 1-2 instructed participants that some statements were present (vs. absent) in an exposure phase allegedly undergone by other individuals. We then asked them to rate such statements based on how they thought those individuals would have done. Overall, participants rated repeated statements as more true than new statements. The instruction-based repetition effects were significant but also significantly weaker than those elicited by the experience of repetition (Experiments 1 and 2). Additionally, Experiment 2 clarified that adding a repetition status tag in the experienced repetition condition did not impact truth judgments. Experiment 3 further showed that the instruction-based effect was still detectable when participants provided truth judgments for themselves rather than estimating other people's judgments. We discuss the mechanisms that can explain these effects and their implications for advancing our understanding of the truth effect. (PsycInfo Database Record (c) 2022 APA, all rights reserved).

Finite element brain deformation in adolescent soccer heading

Finite element (FE) modeling provides a means to examine how global kinematics of repetitive head loading in sports influences tissue level injury metrics. FE simulations of controlled soccer headers in two directions were completed using a human head FE model to estimate biomechanical loading on the brain by direction. Overall, headers were associated with 95th percentile peak maximum principal strains up to 0.07 and von Mises stresses up to 1450 Pa, and oblique headers trended toward higher values than frontal headers but below typical injury levels. These quantitative data provide insight into repetitive loading effects on the brain.

The effect of repetition on intersubject synchrony assessed with fMRI

We investigated how repeated exposure to a stimulus affects intersubject synchrony in the brains of young and older adults. We used functional magnetic resonance imaging (fMRI) to measure brain responses to familiar and novel stimuli. Young adults participated in a familiarization paradigm designed to mimic ‘natural’ exposure while older adults were presented with stimuli they had known for more than 50 years. Intersubject synchrony was calculated to detect common stimulus-driven brain activity across young and older adults as they listened to the novel and familiar stimuli. Contrary to our hypotheses, synchrony was not related to the amount of stimulus exposure; both young and older adults showed more synchrony to novel than to familiar stimuli regardless of whether the stimuli had been heard once, known for a few weeks, or known for more than 50 years. In young adults these synchrony differences were found across the brain in the bilateral temporal lobes, and in the frontal orbital cortex. In older adults the synchrony differences were found only in the bilateral temporal lobes. This reduction may be related to an increase in idiosyncratic responses after exposure to a stimulus but does not seem to be related to how well the stimuli are learned or to differences in attention. Until the effects of repeated exposure on synchrony are fully understood, future studies using intersubject synchrony, where the novelty of the stimuli cannot be guaranteed, may consider exposing all of their participants to the stimuli once before data are collected to mitigate the effects of any systematic differences in stimulus exposure.

La reprise dans le champ musical. À propos de la dimension créatrice de la compulsion de répétition

ObjectivesThe Freudian notion of repetition compulsion is marked, in its inaugural conception, by a negative connotation, that of a return of the same, which does not fully reflect the multiple facets of this register. Raising repetition to the rank of one of the four fundamental concepts of psychoanalysis, Lacan uses Kierkegaard's text entitled “Repetition” to point out the renewal of fecundity that the tendency towards repetition can induce. This article demonstrates how the creative dimension of repetition finds a particularly vivid illustration in the field of music, a domain that makes regular and varied use of the term “repetition.” MethodThis article takes up themes deployed in a series of conferences during the academic year 2021/2022 at the École Pratique des Hautes Études en Psychopathologie, associating musicians – Vincent Ségal – psychoanalysts – Marc Morali, Corinne Tyszler, Olivier Douville – and music lovers, Mario Choueiry, and leaving a large place to musical listening. This study, beyond a reading of the repetition as an expression of the death drive, studies the way in which we can hear and put to work this Freudian notion through its manifestation in the musical register. In this paper, we explore the question of repetition in the sphere of popular music but also in jazz and classical music in order to apprehend its articulation with the very movement of creation. ResultsIn so-called popular music, and mainly in rock music, the covering a song consists in proposing a version, more or less faithful or distant, of an original piece – and not in imitating it. Listening to this cover causes a particular satisfaction in the listener who can identify it. Usually considered as a tribute to the pioneers or the mark of a debt towards elders, the cover version is however above all an attempt, impregnated with hostility, to erase the origin. This is how covers come to not only supplant the original pieces but also to repress them, to make them totally forgotten. Jazz is also attached to covering standards, not only as a necessary learning exercise, but as a way for artists impose their own style and thus gain recognition. The cover of a standard can be the occasion to make audible a blind spot in the original work, or to bring to the surface a trait of identity unknown to itself. Within the context of classical music, the progression of a work is also regularly done through the repetition of a theme that renews itself through slight displacements. Finally, contemporary repetitive music pushes, perhaps to its height, the creativity inherent to the effects of repetition. DiscussionPleasure, repression, origin, hostility, imitation, and identification: these terms that are related to repetition are closely linked to psychoanalysis, which only has at its disposal the concept of “repetition.” It is, however, typical to hear oneself on the divan taking up the story of a dream or that of a memory; one can even “repeat” by continuing one's analysis after a break or termination. This opens up the opportunity to question the creative function of repetition within analytic practice. ConclusionIntroducing the musical dimension of repetition into the analytic treatment leads us to question the specific talent it implies in the practitioner. Repetition only becomes creative through a shift in interpretation that can be found in the poetry of language, where the practitioner is enriched by approaching musical interpretation.

Working memory and processing speed abilities are related to habituation and change detection in school-aged children: An ERP study.

High cognitive performance is related to efficient brain processing while accomplishing complex cognitive tasks. This efficiency is observed through a rapid engagement of the brain regions and the cognitive processes required for task accomplishment. However, it is unclear if this efficiency is also present in basic sensory processes such as habituation and change detection. We recorded EEG with 85 healthy children (51 males) aged between 4 and 13 years old, while they listened to an auditory oddball paradigm. Cognitive functioning was evaluated using the Weschler Intelligence Scales for Children Fifth Edition and the Weschler Preschool & Primary School for Intelligence Fourth Edition. Auditory evoked potentials (AEPs) analyses and repeated measure analysis of covariance as well as regression models were performed. The analysis revealed that P1 and N1 repetition effects were observed across levels of cognitive functioning. Further, working memory abilities were related to repetition suppression on the auditory P2 component amplitude, while faster processing speed was related to repetition enhancement on the N2 component amplitude. Also, Late Discriminative Negativity (LDN) amplitude, a neural correlate of change detection, increased with working memory abilities. Our results confirm that efficient repetition suppression (i.e. greater reduction in amplitudes with greater levels of cognitive functioning) and more sensitive change detection (greater amplitude changes of the LDN) are related to the level of cognitive functioning in healthy children. More specifically, working memory and processing speed abilities are the cognitive domains related to efficient sensory habituation and change detection.

Effect of Exercise Repetitions on Arylesterase Activity of PON1 in Plasma of Average-Trained Men-The Dissociation between Activity and Concentration.

Exercise may increase the antioxidant capacity of plasma by stimulating antioxidant enzymes. The study aimed to measure the effect of three repetitions of acute exercise on arylesterase (ARE) activity of the paraoxonase 1 (PON1) enzyme. Eleven average-trained men (age 34.0 ± 5.2 years) completed three treadmill runs. ARE activity in plasma was evaluated spectrophotometrically and compared with PON1 concentration (PON1c), paraoxonase (PON) activity, and high-density lipoprotein cholesterol (HDL-C) at rest and after exercise. In all repetitions of the exercise, ARE activity remained stable, and ARE activity standardized for PON1c (ARE/PON1c) was lower post- than pre-exercise. The ARE/PON1c ratio changes returned to baseline levels during rest after each exercise session. Pre-exercise ARE activity correlated negatively with post-exercise C-reactive protein (CRP) (ρ = -0.35, p = 0.049), white blood cell count (WBC) (ρ = -0.35, p = 0.048), polymorphonuclear leukocytes (PMN) (ρ = -0.37, p = 0.037), and creatine kinase (CK) (ρ = -0.37, p = 0.036). ARE activity may be depleted under conditions of oxidative stress, as increases in PON1c during acute exercise did not result in parallel increases in ARE activity. No adaptation of the response of ARE activity to exercise was detected in subsequent exercise sessions. Individuals with lower pre-exercise ARE activity may develop a higher inflammatory response to strenuous exercise.

Visual feedback and age affect upper limb reaching accuracy and kinematics in immersive virtual reality among healthy adults.

This cross-sectional study aimed to evaluate the effect of visual feedback, age and movement repetition on the upper limb (UL) accuracy and kinematics during a reaching task in immersive virtual reality (VR). Fifty-one healthy participants were asked to perform 25 trials of a reaching task in immersive VR with and without visual feedback of their hand. They were instructed to place, as accurately and as fast as possible, a controller held in their non-dominant hand in the centre of a virtual red cube of 3 cm side length. For each trial, the end-point error (distance between the tip of the controller and the centre of the cube), a coefficient of linearity (CL), the movement time (MT), and the spectral arc length of the velocity signal (SPARC), which is a movement smoothness index, were calculated. Multivariate analyses of variance were conducted to assess the influence of visual feedback, age and trial repetition on the average end-point error, SPARC, CL and MT, and their time course throughout the 25 trials. Providing visual feedback of the hand reduced average end-point error ( P < 0.001) and MT ( P = 0.044), improved SPARC ( P < 0.001) but did not affect CL ( P = 0.07). Younger participants obtained a lower mean end-point error ( P = 0.037), a higher SPARC ( P = 0.021) and CL ( P = 0.013). MT was not affected by age ( P = 0.671). Trial repetition increased SPARC ( P < 0.001) and CL ( P < 0.001), and reduced MT ( P = 0.001) but did not affect end-point error ( P = 0.608). In conclusion, the results of this study demonstrated that providing visual feedback of the hand and being younger improves UL accuracy and movement smoothness in immersive VR. UL kinematics but not accuracy can be improved with more trial repetitions. These findings could guide the future development of protocols in clinical rehabilitation and research.

Do young EFL learners benefit from task repetition?

ABSTRACT Previous research has shown that task repetition can positively affect L2 oral performance. However, few studies have explored the effects of task repetition on young EFL learners’ production. Also, task repetition research has paid little attention to effects of spacing examined through longer time intervals between the two occasions of task performance. Therefore, this study investigated the impact of immediate and delayed task repetition on young learners’ oral production in terms of complexity, accuracy, and fluency. Forty-four learners aged between 10 and 12 studying at a private language institute in Tehran, Iran, were randomly assigned to one of the three groups in the study: no repetition (NR), immediate task repetition (ITR) and delayed task repetition (DTR). The participants were asked to watch a short silent movie and narrate its story. In the ITR condition, participants repeated the task immediately after their first enactment; the DTR group repeated the same task after 1 month ; and the NR group carried out the task only once. The results showed that ITR had positive impacts on all the three areas of speech production, while DTR could improve accuracy and partly fluency. Also, among the examined areas of oral language production, complexity was found to be the least affected area.

Effects of repetition as training and incentives on the performance in pulmonary function tests in healthy volunteers

Pulmonary function testing (PFT) is a central part of diagnosis and treatment monitoring in respiratory medicine. Few studies have investigated whether repeated PFT or training can significantly influence performance.To investigate potential training effects of repeated PFT, 30 healthy volunteers underwent daily and weekly repeated PFT with spirometry over 10 weeks. The study included 22 females and 8 males with a mean age of 31.8 years ± 15 (SD), a mean weight of 66.3 kg ± 14.5 (SD) and a mean BMI of 22.4 ± 3.3 (SD). The first 5 PFTs were performed on 5 consecutive days, followed by 3 PFTs once a week on the same day of the week. Subsequently, 5 measurements were taken daily for 5 consecutive days. After these 13 appointments in 5 weeks, participants were randomly assigned to the control or incentive group, with stratification for age and gender. The incentive group had the opportunity to win money (200 €) for the highest increase in forced vital capacity (FVC). PFTs were performed once a week on the same day of the week as before for 5 more times. Motivation was assessed by a questionnaire before the 1st, 9th and 18th measure of PFT at three time points throughout the study.An increase in PFT was observed with mean increases of 473 [ml] in FVC, 395 [ml] in forced expiratory volume in 1 s (FEV1) and 1.382 [litres/second] in peak expiratory flow (PEF) after four days of daily PFT. These increases did not persist and spirometric data returned to baseline after one week. After allocation, participants in the incentive group did not increase their FVC, FEV1 or PEF compared to the control group. The incentive group showed higher motivation than the control group, even before allocation.Repeated daily PFT could induce short-term increases, but PFT does not fluctuate significantly in the long term. External influences that affect motivation could not consistently increase PFT. For clinical practice, it can be concluded that PFT does not necessarily require extended training to ensure reliability if reproducibility criteria are met.

Verb argument construction complexity indices and L2 written production: effects of task complexity and task repetition

ABSTRACT This study examines the extent to which verb argument construction (VAC) based indices of syntactic complexity could predict four different writing task conditions: a simple task with no repetition (S + NR), a simple task with repetition (S + R), a complex task with no repetition (C + NR), and a complex task with repetition (C + R). Ninety-six high-intermediate second language (L2) learners of English performed two argumentative writing tasks and repeated them at one-week intervals, with the order of the tasks counterbalanced. The 384 essays collected at four different time points were analyzed in terms of VAC sophistication measures using the Tool for the Automatic Analysis of Syntactic Sophistication and Complexity (Kyle 2016). Results indicated that S + R as well as C + NR and C + R conditions led to more lower-frequency VAC-verb combined structures used in the essays. Further analyses revealed a significant average association strength between verbs and VACs for the C + R group, showing the superiority of this condition over the others in developing syntactically complex argumentative essays. The implications for L2 writing pedagogy and assessment will be discussed.

Reduction or enhancement? Repetition effects on early brain potentials during visual word recognition are frequency dependent.

Most studies on word repetition have demonstrated that repeated stimuli yield reductions in brain activity. Despite the well-known repetition reduction effect, some literature reports repetition enhancements in electroencephalogram (EEG) activities. However, although studies of object and face recognition have consistently demonstrated both repetition reduction and enhancement effects, the results of repetition enhancement effects were not consistent in studies of visual word recognition. Therefore, the present study aimed to further investigate the repetition effect on the P200, an early event-related potential (ERP) component that indexes the coactivation of lexical candidates during visual word recognition. To achieve a high signal-to-noise ratio, EEG signals were decomposed into various modes by using the Hilbert-Huang transform. Results demonstrated a repetition enhancement effect on P200 activity in alpha-band oscillation and that lexicality and orthographic neighborhood size would influence the magnitude of the repetition enhancement effect on P200. These findings suggest that alpha activity during visual word recognition might reflect the coactivation of orthographically similar words in the early stages of lexical processing. Meantime, there were repetition reduction effects on ERP activities in theta-delta band oscillation, which might index that the lateral inhibition between lexical candidates would be omitted in repetition.

The effects of different task repetition schedules on oral narratives of L2 learners with high and low working memory capacity

The present study investigated the effects of different task repetition (TR) schedules on oral complexity, accuracy, and fluency (CAF) of L2 learners with high and low working memory capacity (WMC). To this end, 36 intermediate Iranian learners were assigned to two groups by means of a speaking span task: task repetition of high WMC learners (TRHWM) and task repetition of low WMC leaners (TRLWM). The learners in both groups were required to watch a silent animation, retell the story, and then repeat it immediately. They were also asked to repeat the same task after three days and a week without having a chance to watch the animation. The learners' oral task performances were recorded, coded, and analyzed in terms of the CAF measures. Results revealed that different TR schedules assisted low-WMC L2 learners with improving their complexity measure in terms of lexical diversity such that there was a statistically significant difference between the two groups from the first to the last oral performance. In addition, the findings bear pedagogical significance in that they add support to the positive effect of using different task repetition schedules on the oral performances of both high- and low-WMC L2 learners.

Fixed Time-Point Analysis Reveals Repetitive Mild Traumatic Brain Injury Effects on Resting State Functional Magnetic Resonance Imaging Connectivity and Neuro-Spatial Protein Profiles.

Repetitive mild traumatic brain injuries (rmTBIs) are serious trauma events responsible for the development of numerous neurodegenerative disorders. A major challenge in developing diagnostics and treatments for the consequences of rmTBI is the fundamental knowledge gaps of the molecular mechanisms responsible for neurodegeneration. It is both critical and urgent to understand the neuropathological and functional consequences of rmTBI to develop effective therapeutic strategies. Using the Closed-Head Impact Model of Engineered Rotational Acceleration, or CHIMERA, we measured neural changes following injury, including brain volume, diffusion tensor imaging, and resting-state functional magnetic resonance imaging coupled with graph theory and functional connectivity analyses. We determined the effect of rmTBI on markers of gliosis and used NanoString-GeoMx to add a digital-spatial protein profiling analysis of neurodegenerative disease-associated proteins in gray and white matter regions. Our analyses revealed aberrant connectivity changes in the thalamus, independent of microstructural damage or neuroinflammation. We also identified distinct changes in the levels of proteins linked to various neurodegenerative processes including total and phospho-tau species and cell proliferation markers. Together, our data show that rmTBI significantly alters brain functional connectivity and causes distinct protein changes in morphologically intact brain areas.

Wear in or wear out: how consumers respond to repetitive influencer marketing

PurposeEndorsement marketing has been widely used to generate consumer attention, interest and purchase decisions among targeted audiences. Internet celebrities who become famous on the Internet are dependent on strategic intimacy to appeal to their followers. Our study aims to examine how multiple exposures to Internet celebrity endorsements influence consumers’ click and purchase decisions in the context of influencer marketing.Design/methodology/approachBased on a unique and representative dataset, the authors first model consumers’ choices for clicks and purchases with two panel fixed-effect logit models linking clicks and purchases with the frequency of exposure to Internet celebrity endorsement. To further control the endogeneity produced by the intercorrelation between the click and purchase models, the authors also adopt the two-stage Heckman probit structure to jointly estimate the two models using Maximum Likelihood Estimation. Robustness checks confirm the effectiveness of the models.FindingsThe results suggest that Internet celebrity endorsement plays a significant role in bringing referral traffic to e-commerce sites but is less helpful in affecting conversion to sales. The impact of repetitive Internet celebrity endorsements on consumers’ click decisions is U-shaped, but the role of Internet celebrities as online retailers will “shape-flip” this relationship to a negative linear relation.Originality/valueOur study is the first to investigate the repetitive exposure effect of Internet celebrity endorsement. The results show a contradictory pattern with a wear-out effect of repetition in the advertising literature. This is the first study to show how the endorsing self, which is a common business model in influencer marketing, moderates the effectiveness of influencer marketing.

The Speech of the Repetition of Rhetorical Question “Then Which of the Favours of Your Lord Will You Deny? In Surat AL Rahman

Repetition is a linguistic feature that exists in all languages, and represents different purposes, rhetorical, emphatic, or otherwise. A problematic issue arises when the rhetorical question "Then which of the favours of your Lord will you deny? In Surat AL Rahman repeated many times in Surat Al Rahman. This paper deals with this specific area as far as the repetition of rhetorical question "Then which of the favours of your Lord will you deny? Is concerned. The speech act theory (1962) was applied to investigate realization of speech The repetition of rhetorical question "Then which of the favours of your Lord will you deny? In Surat AL Rahman. The analytical method is used while gathering of data. The paper highlights the Qur’an’s aims and the effects of repetition in Surat Al Rahman. The paper also elucidates the purpose of the repetition in Surat Al Rahman. This paper elucidates that This verse is repeated 31 times in the surah, once after each description of Allah's blessings and punishment as well. The speech in surah Ar-Rahman is namely repetition. The reason used of speech in surah Ar-rahman namely faith, laws of justice, man and jinn, hell and favors heaven.

Repetition learning is neither a continuous nor an implicit process

Learning advances through repetition. A classic paradigm for studying this process is the Hebb repetition effect: Immediate serial recall performance improves for lists presented repeatedly as compared to nonrepeated lists. Learning in the Hebb paradigm has been described as a slow but continuous accumulation of long-term memory traces over repetitions [e.g., Page & Norris, Phil. Trans. R. Soc. B 364, 3737-3753 (2009)]. Furthermore, it has been argued that Hebb repetition learning requires no awareness of the repetition, thereby being an instance of implicit learning [e.g., Guérard etal., Mem. Cogn. 39, 1012-1022 (2011); McKelvie, J. Gen. Psychol.114, 75-88 (1987)]. While these assumptions match the data from a group-level perspective, another picture emerges when analyzing data on the individual level. We used a Bayesian hierarchical mixture modeling approach to describe individual learning curves. In two preregistered experiments, using a visual and a verbal Hebb repetition task, we demonstrate that 1) individual learning curves show an abrupt onset followed by rapid growth, with a variable time for the onset of learning across individuals, and that 2) learning onset was preceded by, or coincided with, participants becoming aware of the repetition. These results imply that repetition learning is not implicit and that the appearance of a slow and gradual accumulation of knowledge is an artifact of averaging over individual learning curves.

Manual assembly learning, disability, and instructions: an industrial experiment

Cognitive assistance systems help people with learning disabilities to increase their skills and consequently their employment opportunities in the regular labour market. Research on advanced work instructions has encouraged training disabled workers in cognitively demanding production tasks, especially manual assembly. However, studies lack evidence on the effect of repetition or work cycle alongside the form of instruction and type of disability. This paper addresses this gap and reports on an experiment conducted at a sheltered workplace. Four forms of instruction (paper-based, animations, projection, adaptive projection) were tested to assist operators with three types of disability (illiterate, psychosocial, cognitive) with a manual assembly task. The results show that projection enhances the first assembly cycle. Challenging operators by filtering the content of the instruction with increased experience leads to greater independence and a better understanding of their tasks. However, adaptive instructions can form a barrier for those operators who are most dependent on mentor support. The form of instruction should thus be considered carefully for each operator as their adaptation to changes and cognitive assistance systems varies. The results are discussed in light of the Industry 5.0 human-centric and socially sustainable production agenda with managerial and research implications and future research priorities.

The impact of input, input repetition, and task repetition on L2 lexical use and fluency in speaking

The present study investigates the impact of meaningful input on L2 learners’ vocabulary use and their fluency in oral performance (immediate and repeat tasks), as well as whether the effects are mediated by learners’ prior vocabulary knowledge and working memory. Ninety university students learning English as a foreign language were randomly assigned to one of three groups: input (N = 29), input repetition (N = 32), and no-input (i.e., baseline group) (N = 29). The input group watched L2 videos prior to performing an immediate oral task, whereas the input repetition group watched the same videos not only before but also after the immediate oral task. The no-input group only performed the oral tasks without watching the videos. The three groups repeated the same oral task after two days. Results did not show a significant effect of task repetition, input, and input repetition on learners’ lexical use and fluency. However, the fluency and lexical complexity in learners’ L2 speech can be predicted by their receptive vocabulary knowledge and working memory capacity to some extent.