Thesis. 1976. Ph.D.--Massachusetts Institute of Technology. Dept. of Psychology. / Microfiche copy available in Archives and Humanities. / Vita. / Includes bibliographies. / Ph.D.

The presented thesis focuses on garden-path sentence processing in Czech and follows the line of research within the good-enough approach to language comprehension. Some studies within this framework suggest that, after a garden-path sentence is reanalysed, a full and complete syntactic representation is formed, but the system fails to prune the initial misanalysis completely (Slattery et al., 2013; Qian et al., 2017). However, the research of garden-path sentences within the good-enough approach stems from a limited number of syntactic structures. This thesis presents a series of three self-paced reading experiments employing open-ended comprehension questions that aim to test if the conclusions of Slattery et al. (2013) can also be applied to syntactic structures that have not yet been examined within this framework, namely senteces such as "Roztržitý kastelán zamkl průvodkyni na nádvoří koloběžku.". The results are only partially in accordance with the hypothesis. The lingering misanalysis effect was shown only for the sentences with an animate object (these sentences were generally harder to process). Sentences with an inanimate object, that are easier to analyse, show no difference in response accuracy in comparison with similar unambiguous sentences. Keywords: garden-path sentences,...

Various infant studies suggest that statistical regularities in the speech stream (e.g. transitional probabilities) are one of the first speech segmentation cues available. Statistical learning may serve as a mechanism for learning various language specific segmentation cues (e.g. stress segmentation by English speakers). To test this possibility we exposed adults to an artificial language in which all words had a novel acoustic cue on the final syllable. Subjects were presented with a continuous stream of synthesized speech in which the words were repeated in random order. Subjects were then given a new set of words to see if they had learned the acoustic cue and generalized it to new stimuli. Finally, subjects were exposed to a competition stream in which the transitional probability and novel acoustic cues conflicted to see which cue they preferred to use for segmentation. Results on the word-learning test suggest that subjects were able to segment the first exposure stream, however, on the cue transfer test they did not display any evidence of learning the relationship between word boundaries and the novel acoustic cue. Subjects were able to learn statistical words from the competition stream despite extra intervening syllables.

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This study explores how native and nonnative English speakers understand and perceive directness types in written teacher feedback (WTF). Currently research suggests that indirect speech in WTF will encourage students to think and maintain politeness between teacher and student (Benkendorf, 2001; Riley, 2003; Thonus, 1999; Vassileva, 2000). However, research also indicates that indirect speech may be more difficult to interpret than direct speech (Champagne, 2001; Holtgraves, 1999), which suggests that indirect speech used in WTF may be difficult for students to interpret and use to improve their compositions (Ferris, 2007; Hyland & Hyland, 2001). This difficulty may be even more acute for second language (NNS) learners (Ferris, 2002; Mackiewicz & Riley, 2002, 2003). This thesis will test and propose refinements to this study. In this study, native (NS) and nonnative (NNS) English speaking university students, were given two essays directness of the WTF. These participants had three main tasks: 1. to identify whether or not WTF requests a correction, 2. to make the correction if requested, 3. to identify perceptions of the teacher and paper based on the WTF. For the first two tasks, accuracy and response times were calculated. Results showed that directness type affects the speed and accuracy of both NS and NNS learners. Direct speech in WTF was more quickly identified than indirect speech (indirect speech acts and hedging). Indirect speech was the slowest and least accurate for both NS and NNS learners in relation to positive WTF. Surprisingly, both NS and NNS were slowest for making corrections on direct WTF. In addition, directness type also affected the perception on the teacher and paper. For example, NS were likely to perceive indirect speech as being from a female teacher. NNS were more likely to give papers with hedged WTF an A and those with indirect WTF a C grade. This study suggests that the directness type of WTF affects how quickly and how well it is understood by both NS and NNS learners. It also suggests that the pragmatic theory may explain why direct speech is processed more quickly than indirect speech (indirect speech acts and hedging).

The purpose of this research was to study grammatical categories in the Tagalog mental lexicon using lexical decision tasks. Some linguists question whether words in Tagalog can be classified as nouns and verbs (Foley, 1998; Kaufman, 2011) because most root words can be inflected for any grammatical function and because verbs cannot be used in their uninflected form. Previous studies with English and German (Kauschke and Stenneken 2008) have shown that participants respond differently to nouns and verbs in lexical decision tasks. These studies have also shown that participants respond differently to transitive and intransitive verbs in lexical decision tasks. It was assumed that if nouns and verbs exist in Tagalog, response times to Tagalog lexical decision tasks will show similar patterns to those performed in English and German. Two experiments were performed to examine whether words are classified as nouns and verbs in the Tagalog mental lexicon and whether other factors affected that classification. For the experiments, native speakers of Tagalog participated in lexical decision tasks and response times were measured. The first experiment tested the classification of root nouns and verbs. Contrary to findings in other languages, there was no significant difference between response times to nouns and verbs. However, there were differences in response times to nouns from different semantic categories and to verbs with different morphosyntactic structures. The second experiment examined the classification of inflected nouns and verbs. Again, the results showed no difference between response times to nouns and verbs. There was also no difference between transitive and intransitive verbs. However, there was a slight difference between verbs of different voice inflections. The results of the experiments suggest the while the grammatical classes of nouns and verbs may not be the most important features of words in the Tagalog mental lexicon, they may still play a role since different features, semantics or morphosyntactics, did affect the responses to words from the different categories.

Previous research has suggested that attraction errors are not due to the proximity of the local noun and verb, as a more distant local noun can result in more errors than a nearer one (e.g., *The helicopter for the flights over the canyon are vs. *The helicopter for the flight over the canyons are; Franck, Vigliocco, & Nicol, 2002). However, the verb tends to agree in number with the nearer noun of a disjoined subject, suggesting that linear order can indeed play a role in agreement computation (e.g., The horse or the clocks are vs. The horses or the clock is; Haskell & MacDonald, 2005). In the present study, two experiments using a two-alternative forced-choice production paradigm and one experiment using eyetracking during reading directly compared agreement computation in the classic attraction configuration and when the subject is a coordinate phrase. The 2AFC experiments replicated both the lack of a linear distance effect in classic attraction and the presence of a linear order effect in disjunction agreement, which was also extended to conjunction agreement; when the second conjunct was singular, subjects frequently selected a singular verb. This order effect was also modulated by the presence or absence of additional material between the subject and verb. In the eyetracking experiment, a singular second conjunct both facilitated processing of a singular verb and inhibited processing of a plural verb. These results suggest that variable agreement with coordinate subjects is not a form of agreement attraction and that distinct theoretical treatments are required for two distinct phenomena.

A word’s predictability has been shown to influence its processing. Two methodologies have demonstrated this time and again: eye tracking while reading and Event Related Potentials (ERPs). In eye tracking while reading, words that are made predictable by their contexts (as operationalized by the cloze task; Taylor, 1953) receive shorter first fixation times (Staub, 2015, for a review) as well as shorter gaze duration and increased skipping rate. In ERPs, the N400 component’s amplitude has also been shown to inversely correlate with a word’s predictability (Kutas and Federmeier, 2011, for a review). Despite the similarities, there is much reason to suspect that these two measures are reflections of different underlying cognitive processes, both modulated by a word’s predictability. We utilized the simultaneous collection of EEG and eye tracking data to investigate the differential effects of lexical predictability and stimulus quality on these measures. We found that these two manipulations had additive effects in the eye movement record, but yet only the manipulation of predictability influenced the N400 Fixation Related Potential (FRP) amplitude, with stimulus quality influencing neither the amplitude nor the latency of the N400. These findings provide no evidence for there being a role for predictability in early visual processing, and thus call into question the relative ordering of lexical processing effects laid out in Staub and Goddard (2019). Our findings also suggest that the N400’s underlying process is strictly temporally fixed and indexes the lexical processing difficulty left after there has already been a convergence of evidence towards the identity of the observed stimulus.

Evidence of systematic misreading has been taken to argue that language processing is noisy, and that readers take noise into consideration and therefore sometimes interpret sentences non-literally (rational inference over a noisy channel). The present study investigates one specific misreading phenomenon: failure to notice word transpositions in a sentence. While this phenomenon can be explained by rational inference, it also has been argued to arise due to parallel lexical processing. The study explored these two accounts. Visual, lexical, and syntactic properties of the two transposed words were manipulated in three experiments. Failure to notice the transposition was more likely when both words were short, and when readers' eyes skipped, rather than directly fixated, one of the two words. Failure to notice the transposition also occurred when one word was long. The position of ungrammaticality elicited by transposition (the first vs. second transposed word) influenced tendency to miss the error; the direction of the effect, however, depended on word classes of the transposed words. Failure of detection was not more likely when the second transposed word was easier to recognize than the first transposed word. Finally, readers’ eye movements on the transposed words revealed no disruption in those trials when they ultimately accepted the sentence to be grammatical. We consider the findings to be only partially supportive of parallel lexical processing and instead propose that word recognition is serial, but integration is not perfectly incremental, and that rational inference may take place before an ungrammatical representation is constructed.

In modern-day psycholinguistics, there is a rising interest in looking at bilingualism from a holistic perspective. Yet, only a few are the methods employed as efficient and comprehensive of all the variables and factors that affect language acquisition and the motivation for someone to seek to acquire another language. Historically, research has also recognized the extreme value of bilingualism at a neurological level (we know that it offers protection against neurodegeneration and increased grey matter presence in some brain regions, aiding in cognitive performance overall). However, we ignore the full extent of the mechanisms that aid this complex process and the trajectory the speaker takes from initial exposure to another language to becoming competent. Vocal biomarkers are a currently emerging topic in behavioral research due to their potential uses in the early detection of psychopathology and neurodegeneration, potentially by just recording a person's voice and relying on an app to analyze and provide a report. We created a comprehensive battery to measure bilingualism, including surveys and a vocal assessment, considering specific vocal patterns (jitteriness, sustentation, and others). Participants took a modified version of a golden reference test for bilingualism research, the Bilingual Language Profile, to which we added a technology usage question and a cultural influences section. We then collected voice samples from them, completing three tasks.