Event related potentials (ERPs) may provide specific information about how particular aspects of language are processed by the brain over time. This study investigated the electrophysiology of language processing in two children with language impairment (LI) when compared to five typically developing children. The N400, P600, and the early left anterior negativity (ELAN) were analyzed after participants listened to linguistically correct, syntactically incorrect, and semantically incorrect sentences. Participants were instructed to indicate whether the sentences were correct or incorrect. Latency and amplitude of the ERP components were compared between the two groups of participants and sentence types. Results from the current study concerning the typically developing children suggest that, at least by eight years of age, typically developing children may process linguistic information similarly to adults with regard to the areas of the brain that are activated during the processing of linguistic stimuli. When comparing results from participants with LI and their typically developing counterparts, results indicate that children with LI exhibit slower real-time language processing than typically developing children. Results also indicate that children with LI require more effort than typically developing children in processing linguistic information as indicated by the amplitude of the N400 and the ELAN. In analyzing the P600 in both groups of participants, results indicate that syntactic processing may be intact in children with LI as well as typical children. Results concerning the N400 and the ELAN were variable between the two participants with LI indicating that children with LI may be heterogeneous even in the presence of similar tasks. Results obtained from the ELAN may also indicate that the ELAN is not fully mature at eight years of age.

Behavioral symptoms of autism spectrum disorder (ASD) begin to emerge around 12 months of age and are preceded by subtle differences in how infants process and interact with the world (Elsabbagh & Johnson, 2010). Similar atypical behavioral patterns and markers of brain organization (`endophenotypes') are present in infants at risk for ASD (HRA) due to their family history, regardless of whether they ultimately develop the disorder. Possible endophenotypes of ASD were investigated through four studies that examined event-related potentials (ERPs) to speech and language in HRA and low-risk control (LRC) infants as part of a larger, longitudinal project. Chapter 2 examined ERPs to language-specific phonemes at 6, 9, and 12 months (n=59 at 6mo, 77 at 9mo, and 70 at 12mo) and found that HRA infants were not delayed in phonemic perceptual narrowing yet exhibited atypical hemispheric lateralization of ERPs at 9 and 12 months. Chapter 3 explored these findings further in a sample with known developmental outcome (n=60 at 6mo, 75 at 9mo, and 72 at 12mo) in order to understand how these ERPs differ between infants who ultimately develop ASD and infants who do not. Chapter 4 examined responses to repeated speech stimuli at 9 months (n=95). HRA infants exhibited atypically large ERPs to repeated speech, and this pattern was associated with better later language ability. Finally, Chapter 5 examined ERPs to words at 18 and 24 months (n=41 at 18mo, 52 at 24mo) and found evidence for atypical topography of responses to known versus unknown words, particularly at 18 months. These findings provide evidence that in HRA infants, even those who do not develop ASD, neural processing of linguistic stimuli is altered during infancy and toddlerhood. The results from Chapter 4 suggest that at least some of the differences seen in HRA infants who do not develop ASD may reflect beneficial, rather than disordered, processing. Overall, these results contribute to growing evidence that familial risk for ASD is associated with atypical processing of speech and language during infancy. Future work should continue to investigate more closely the implications of atypical neural processing for infants' later development.

Temporally selective attention allows for the preferential processing of stimuli presented at particular times, and is reasoned to be important for processing rapidly presented information such as speech. Recent event-related potential (ERP) evidence demonstrates that listeners direct temporally selective attention to times that contain word onsets in speech. This may be an effective listening strategy since these moments provide critical information to the listener, but the mechanism that underlies this process remains unexplored. In three experiments, putative attention cues including word recognition and predictability were manipulated in both artificial and natural speech and ERP responses at various times were compared to determine how listeners selectively process word onsets in speech. The results demonstrate that listeners allocate attention to word-initial segments because they are less predictable than other times in the speech stream. Attending to unpredictable moments may improve spoken language comprehension by allowing listeners to glean the most relevant information from an otherwise overwhelming speech signal.

Hearing loss, as a result of old age, has been linked to a decline in speech perception despite the use of additional listening devices. Even though the relationship between hearing loss and decreased speech perception has been well established, research in this area has often focused on the behavioral aspects of language and not on the functionality of the brain itself. In the present study, the mismatch negativity, an event related potential, was examined in order to determine the differences in speech perception between young adult participants, geriatric normal hearing participants, and geriatric hearing-impaired participants. It was hypothesized that a significantly weaker mismatch negativity would occur in the geriatric hearing-impaired participants when compared to the young adult participants and the geriatric normal hearing participants. A passive same/different discrimination task was administered to 10 young adult controls (5 male, 5 female) and eight older adult participants with and without hearing loss (4 male, 4 female). Data from behavioral responses and event related potentials were recorded from 64 electrodes placed across the scalp. Results demonstrated that the mismatch negativity occurred at various amplitudes across all participants tested; however, an increased latency in the presence of the mismatch negativity was noted for the geriatric normal hearing and the geriatric hearing-impaired participants. Dipoles reconstructed from temporal event related potential data were located in the cortical areas known to be instrumental in auditory and language processing for the young adult participants; however, within the geriatric normal hearing and the geriatric hearing-impaired participants, dipoles were seen in multiple locations not directly associated with language and auditory processing. Although not conclusive, it appears that within the geriatric normal hearing and the geriatric hearing-impaired participants there is slower processing of the speech information, as well as some cognitive confusion which leads to fewer available resources for interpretation.

In this thesis, I investigate idiom processing from two angles through three different studies. First, I approached idiom processing from a constraint-based perspective. According to this view, not all idioms are alike: they can differ regarding lexical, and linguistic characteristics, such as their level of familiarity. In this first study, I investigated the underlying processes during the comprehension of idioms with different characteristics. I used the Event Related Potential (ERP) technique, which has high temporal resolution, to investigate this issue. I provided evidence that idioms' characteristics impact their processing. More specifically, idioms which are more familiar to language users (i.e., the ones that are encountered more frequently) showed processing facilitation compared to less familiar idioms. Also, idioms with plausible literal interpretation showed processing advantages over idioms which are less likely to be interpreted literally. The second aim of the current thesis was to investigate idiom processing from an embodied account of language processing. According to this view, various sources of information (including linguistic, affective, and sensory-motor) are available and used during the comprehension of language. While, this view has become popular in many language processing studies, studies of idiom processing are still at the beginning of this journey. To be able to investigate idiom processing while considering the role of affective and sensory-motor factors, we require access to norming data. In the second (descriptive) study, I conducted a large-scale survey and collected measures of valence, arousal, concreteness, and imageability for a set of English idioms, by both native speakers of English and proficient second language speakers. In the last study, I explored how the emotional status of idioms and their concreteness contributes to their processing, and whether this contribution is modulated by idiom familiarity. We found that the impact of non-linguistic sources of information (affective and sensory-motor) is determined by idiom familiarity, such that low familiar and high familiar idioms show different behaviour where these factors are concerned. For highly familiar idioms, behaviour aligns with the findings on word processing: for example, idioms with more positive valence showed facilitative processing. Unlike highly familiar idioms, valence had an inhibitory impact on idioms with low familiarity level, such that greater valence increased the reading time.

Grammatical gender is a complex classification system and is often referred to as one of the most difficult grammatical categories for second language (L2) speakers to master. Previous research has focused on anticipatory processing of grammatical gender cues in first language (L1) speakers of various gendered languages (French, Spanish, Dutch, etc.) and has found that speakers use gender information from a preceding determiner to facilitate access to a gender-congruent noun (e.g., Dussias et al., 2013; Lew-Williams & Fernald, 2010). These findings have been consistently found among speakers of various languages when they were presented with congruent vs. incongruent determiner phrases (DPs), subsequently collapsing across grammatical genders (e.g., congruent: la maison and le bateau vs. incongruent: *le maison vs. *la bateau). Responses to individual genders cues in Spanish has been teased apart (masculine vs. feminine) as well as the effect of inhibitory control on gender processing (Beatty-Martínez, et al., 2020). A correlation between grammatical gender error recovery and increased inhibitory control was found. The current dissertation aims to dissect the processing and underlying neural mechanisms associated with masculine and feminine grammatical gender in L1 French, simultaneous French-English, and L1 English-L2 French speakers. A series of three experiments were conducted. The first two experiments used a masked priming lexical decision task where participants were presented with congruent (e.g., la maison) and incongruent (*le maison) DPs. The first experiment employed a behavioural version of the task and the second experiment focused on event-related brain potentials (ERPs). At a behavioural level, there was no indication of grammatical gender cue use. However, ERP results show that L1 speakers employ distinct processing mechanisms for feminine (P200; *le maison) incongruencies compared to feminine congruencies (la maison). The final experiment consisted of a self-paced reading task, where participants read sentences with congruent and incongruent DPs and an AX-CPT task as a measure of inhibitory control. L1 French and simultaneous French-English speakers exhibit processing difficulties with the incongruent feminine condition (*le maison) compared to the congruent feminine condition (la maison), as well as with the incongruent masculine condition (*la bateau) compared to the congruent masculine condition (le bateau). On the other hand, L2 speakers only show difficulty with the incongruent feminine condition in relation to the congruent feminine condition. Further, there was no relationship between inhibitory control and grammatical gender processing across groups. Overall, the results reflect an intricate picture of grammatical gender processing in French speakers. At a lexical level, L1 French speakers likely process incongruent feminine DPs as a lexical clash, potentially implementing further cognitive resources during processing. At a syntactic level, L1 French and simultaneous French-English speakers show processing difficulties behaviourally to gender incongruencies. L2 speakers seem to employ the use of masculine grammatical gender cues, implying that it is perhaps the presence of a feminine noun causing processing difficulty due to a feature mismatch. These results indicate that masculine and feminine genders employ distinct processing mechanisms and may be accessed in a contrasting manner.

No description available.

Yes / Posed facial expressions of actors have often been used as stimuli to induce mental state inferences, in order to investigate 'Theory of Mind' processes. However, such stimuli make it difficult to determine whether perceivers are using a basic or more elaborated mentalizing strategy. The current study used as stimuli covert recordings of target individuals who viewed various emotional expressions, which caused them to spontaneously mimic these expressions. Perceivers subsequently judged these subtle emotional expressions of the targets: in one condition ('classification') participants were instructed to classify the target's expression (i.e. match it to a sample) and in another condition ('retrodicting') participants were instructed to retrodict (i.e. infer which emotional expression the target was viewing). When instructed to classify, participants showed more prevalent activations in event-related brain potentials (ERPs) at earlier and mid-latency ERP components N170, P200 and P300-600. By contrast, when instructed to retrodict participants showed enhanced late frontal and fronto-temporal ERPs (N800-1000), with more sustained activity over the right than the left hemisphere. These findings reveal different cortical processes involved when retrodicting about a facial expression compared to merely classifying it, despite comparable performance on the behavioral task. / Experimental Psychology Society (EPS) Study Visit Grant; Young Researcher Support Grant DRM/2014-02; Deutsche Forschungsgemeinschaft (SCHN 1481/2-1); Deutsche Forschungsgemeinschaft (FOR 1097)

Over the last 30 or more years evidence has accumulated in favour of the view that memory is not a unitary faculty; rather, it can be subdivided into a num- ber of functionally independent subsystems. Whilst dividing memory phenomena into these distinct subsystems has undoubtedly advanced our understanding of memory as a whole, the approach of studying subsystems in isolation fails to address potential interactions between them. Over the last few decades there has been a gradual increase in the number of studies attempting to move be- yond dissociation by characterising functional interactions between subsystems of memory. The main aim of this thesis was to contribute to this endeavour, by examining interactions between two specific subsystems that are positioned on opposite sides of the declarative and non-declarative divide in long-term mem- ory: priming and episodic recognition. Event-Related Potentials (ERPs) were employed to monitor neural markers of repetition priming and episodic memory during recognition tests with masked priming of test cues. In the standard pro- cedure, half of the studied and unstudied test trials began with a brief (48ms) masked repetition of the to-be-recognized word prior to the onset of test items; the remaining unprimed trials were preceded by the word “blank”. The pattern of priming effects across experiments was reasonably consistent, with differences between experiments directly related to the intended manipulations. In contrast to priming effects, the pattern of memory effects was variable across experiments, demonstrating that the engagement of explicit recognition signals is influenced by the outcome of implicit processing, and suggesting that interactions between priming and explicit retrieval processes do occur. Taken together, results from experiments reported in this thesis indicate (1) that under certain circumstances, priming is sufficient to support accurate recognition and does not necessitate changes in memory performance, (2) that mid-frontal old/new effects indexing familiarity are not merely driven by repeated access to semantic information, and (3) that priming influences neural correlates of recollection by speeding their onset. Overall, the data clearly demonstrate that there are multiple potentially interacting routes to recognition.

Judgments of Learning (JOLs) are judgments of the likelihood of remembering recently studied material on a future test. Although JOLs have been extensively studied, particularly due to their important applications in education, relatively little is known about the cognitive and neural processes supporting JOLs and how these processes relate to actual memory processing. Direct access theories describe JOLs as outputs following direct readings of memory traces and hence predict that JOLs cannot be distinguished from objective memory encoding operations. Inferential theories, by contrast, claim JOLs are products of the evaluation of a number of cues, perceived by learners to carry predictive value. This alternative account argues that JOLs are made on the basis of multiple underlying processes, which do not necessarily overlap with memory encoding. In this thesis, the neural and cognitive bases of JOLs were examined in a series of four ERP experiments. Across experiments the study phase ERP data showed that JOLs produce neural activity that is partly overlapping with, but also partly distinct from, the activity that predicts successful memory encoding. Furthermore, the neural correlates of successful memory encoding appear sensitive to the requirements to make a JOL, emphasising the close interaction between subjective and objective measures of memory encoding. Finally, the neural correlates of both JOLs and successful memory encoding were found to vary depending on the nature of the stimulus materials, suggesting that both phenomena are supported by multiple cognitive and neural systems. Although the primary focus was on the study phase ERP data, the thesis also contains two additional chapters reporting the ERP data acquired during the test phases of three of the original experiments. These data, which examined the relative engagements of retrieval processes for low and high JOL items, suggest that encoding processes specifically resulting in later recollection (as opposed to familiarity) form one reliable basis for making JOLs. Overall, the evidence collected in this series of ERP experiments suggests that JOLs are not pure products of objective memory processes, as suggested by direct access theories, but are supported by neural systems that are at least partly distinct from those supporting successful memory encoding. These observations are compatible with inferential theories claiming that JOLs are supported by multiple processes that can be differentially engaged across stimulus contents.