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Articles 1 - 30 of 33
Full-Text Articles in Cognition and Perception
From Stranger To Self: The Role Of Familiarity In Modulating The N170 And N250 Erp Components, Tabish Gul
From Stranger To Self: The Role Of Familiarity In Modulating The N170 And N250 Erp Components, Tabish Gul
Dissertations
This study investigated how varying levels of face familiarity modulate the N170 and N250 event-related potential (ERP) components, two neural markers of face perception and recognition. While the N250 is widely considered familiarity-sensitive, the N170 has traditionally been linked to the structural encoding stage of face perception. However, recent research suggests that face familiarity may also influence N170 amplitude and latency. While most previous studies have compared up to three familiarity levels, the present study examined five levels of familiarity: own face, friend’s face, famous face, experimentally familiar face, and unfamiliar face. Twenty-six participants viewed face images while completing a …
Eeg And Media Multitasking: Adhd As A Moderating Factor, Xiaoying Guo
Eeg And Media Multitasking: Adhd As A Moderating Factor, Xiaoying Guo
Theses and Dissertations
Media use has become an integral part of everyday life. It has risen dramatically over the past century with the advent of television, computers, and digital platforms, and more recently, it has been characterized by individuals using multiple devices simultaneously (Bushman & Anderson, 2001; Nielsen Media Research, 1998; Rideout & Robb, 2019, 2021). Media multitasking (MMT) has been linked to cognitive control challenges and attentional difficulties. This study examined EEG workload (Fz theta/Pz alpha ratio), survey accuracy, and ADHD traits (ASRS v1.1) in 33 adult participants across baseline and single-versus dual-media conditions. Results indicated that mental workload was significantly higher …
Using Eeg To Measure Attentional Spreading Across Objects, Dawson L. Green, Michael Pratte
Using Eeg To Measure Attentional Spreading Across Objects, Dawson L. Green, Michael Pratte
Honors Theses
Abstract: Attention may not solely be restricted to a spatial area or a feature of an object, but rather can “spread” across all parts of an object in space, enhancing the processing of its features collectively (Duncan, 1984). This phenomenon suggests that attention operates at the level of whole objects, enhancing the representation of all features associated with the attended object while suppressing competing stimuli. Building on this object-based framework, the present thesis examines the functional and neural dissociation between attention and awareness using steady-state visually evoked potentials (SSVEPs) as a frequency-tagging method in EEG. Leveraging the high temporal resolution …
Effect Of Emotional Expression And Teeth Visibility On Facial Processing, Alexandra Ackerman
Effect Of Emotional Expression And Teeth Visibility On Facial Processing, Alexandra Ackerman
Electronic Theses, Projects, and Dissertations
The N170 is an event-related potential (ERP) component commonly associated with its sensitivities to face stimuli. While mixed literature exists, the N170 has been repeatedly demonstrated to be modulated by emotion. In a highly cited study, Blau et al. (2007) found that the N170 is heavily modulated by emotional expression, with fearful expressions eliciting larger N170 amplitudes than neutral expressions. In their study, however, analysis did not account for variability in mouth positioning in fearful and neutral expressions and how this variability might influence differences observed in amplitudes of the N170. A distinctive feature in the fearful condition was the …
Exploring Cross-Linguistic Speech Perception In Hindi, English, And Romance-Language Through Temporal Dynamics Of Neural Activity, Yuga Kothari
Dissertations, Theses, and Capstone Projects
This study examines the effect of linguistic experience on the neural processing of Voice Onset Time (VOT) in Hindi and Romance language (Spanish and Portuguese) individuals who are bilingual in English and monolingual English speakers using the event-related potential (ERP) Mismatch Negativity (MMN) response. VOT is a linguistic property that measures the time elapsed between the release of a stop consonant and the beginning of voicing, that is, vocal fold vibration of a following vowel. In a double-oddball paradigm, participants’ (n = 41) ERP were recorded while listening to speech sounds differing in VOT. The bilabial short lag stop [p] …
Does Cleft Repair Surgery Restore Normal Visual And Neural Responses To Infant Faces?, Rachael Leanne Kee
Does Cleft Repair Surgery Restore Normal Visual And Neural Responses To Infant Faces?, Rachael Leanne Kee
Cal Poly Humboldt theses and projects
Infant faces readily capture our attention and elicit enhanced neural processing, likely due to their evolutionary importance in facilitating bonds with caregivers. Infant facial malformations are associated with a lower degree of parental investment and have been shown to negatively impact early infant-caregiver interactions. Cleft lip or cleft palate is a common facial malformation, estimated to affect 1 in 700 live births worldwide, that is associated with altered visual and neural processing as compared to normal infant faces. Importantly, it is not yet known how craniofacial repair surgery impacts responses to these faces. The current study uses eye tracking and …
Digital Manipulation Of Human Faces: Effects On Emotional Perception And Brain Activity, Martin Knoll
Digital Manipulation Of Human Faces: Effects On Emotional Perception And Brain Activity, Martin Knoll
Electronic Theses and Dissertations
The study of human face-processing has granted insight into key adaptions across various social and biological functions. However, there is an overall lack of consistency regarding digital alteration styles of human-face stimuli. In order to investigate this, two independent studies were conducted examining unique effects of image construction and presentation. In the first study, three primary forms of stimuli presentation styles (color, black and white, cutout) were used across iterations of non-thatcherized/thatcherized and non-inverted/inverted presentations. Outcome measures included subjective reactions measured via ratings of perceived “grotesqueness,” and objective outcomes of N170 event-related potentials (ERPs) measured via encephalography. Results of subjective …
Classical Conditioning Of Cognitive States, Arthur Burns
Classical Conditioning Of Cognitive States, Arthur Burns
Neuroscience Honors Papers
Classical conditioning has been a fundamental concept and practice throughout the history of psychology. While classical conditioning traditionally seeks to elicit target behaviors in correlation to specific stimuli, we sought to do the same with cognitive states in place of behaviors. Specifically, we wanted to determine the effectiveness of conditioning states of cognitive arousal in human participants in conjunction with cues presented in a designed learning task. We designed a cognitive task specifically for this research, referred to as “the Tone Pitching Task”, which utilized a combination of working memory and mental processing in order to elicit cognitive arousal and …
The Mental Noise Hypothesis: A Relation Between Neuroticism And P3 Latency Variance In A Stroop-Style Reaction Time Task, Jeremy Lawrence
The Mental Noise Hypothesis: A Relation Between Neuroticism And P3 Latency Variance In A Stroop-Style Reaction Time Task, Jeremy Lawrence
All NMU Master's Theses
Neuroticism is a relatively stable personality dimension characterized by tendencies to experience negative thoughts and affect. Its empirically related outcome measures range from anxiety and mood disorders to increases in mortality. Traditional theories of neuroticism, link the construct to greater threat sensitivity, however, these conceptions fail to account for certain salient features of neuroticism, such as negative affect in threat benign environments. The mental noise hypothesis posits that neuroticism results from a more variable mental control system, with support coming from behavioral, psychometric, and neuroimaging paradigms. To assess whether this more chaotic mental control system would variably disrupt the stimulus …
Classical Conditioning Of Cognitive States, Arthur Burns
Classical Conditioning Of Cognitive States, Arthur Burns
Neuroscience Presentations
This research sought out to do preliminary testing to prepare for honors research in the 2021 academic year. This research focuses on attempting to classically condition cognitive states. Learning tasks were designed to elicit relaxation or arousal in partisans and a combination of EEG data, pupil dilation data, performance on cognitive tasks, and self-report were used to evaluate the level of cognitive states in participants.
Classical Conditioning Of Cognitive States, Arthur Burns
Classical Conditioning Of Cognitive States, Arthur Burns
Neuroscience Summer Fellows
This research sought out to do preliminary testing to prepare for honors research in the 2021 academic year. This research focuses on attempting to classically condition cognitive states. Learning tasks were designed to elicit relaxation or arousal in partisans and a combination of EEG data, pupil dilation data, performance on cognitive tasks, and self-report were used to evaluate the level of cognitive states in participants.
Characterizing The Brain Dynamics And Eye Movement Behavior Of Memory-Guided Saccades: A Preliminary Investigation Of Distractor Influence On Memory-Guided Saccades, Angelo V. Colmenero
Characterizing The Brain Dynamics And Eye Movement Behavior Of Memory-Guided Saccades: A Preliminary Investigation Of Distractor Influence On Memory-Guided Saccades, Angelo V. Colmenero
Dissertations, Theses, and Capstone Projects
Research has helped to shed light on the functional organization and neural mechanisms of distractors on memory-guided saccades. In our current study we have utilized eye tracking and EEG technology to simultaneously record the changes in saccadic eye movement (SEM) behavior and event-related potentials (ERPs) associated with performance on a memory-guided saccade task with distractor conditions. Thirteen healthy control participants (n = 13; 6 female) were tasked to complete 864 memory-guided saccade trials with both visible (white) and invisible (black) distractors presented on a black background before saccade initiation. Compared with the control (black) distractor condition, distractor presentation produced a …
The Temporal Dynamics Of Ensemble Perception, Michael L. Epstein
The Temporal Dynamics Of Ensemble Perception, Michael L. Epstein
Dissertations, Theses, and Capstone Projects
The striking disparity between the subjective richness of experience and the considerable limitations of perceptual processing has emerged as an essential, enduring question in both vision science and philosophy of mind. A potential solution to this issue is ensemble perception: the ability for the visual system to compute the statistical summaries of object groups, effectively compressing an otherwise overwhelming amount of information. Previous work has supported that ensemble statistics can be perceived quickly and accurately for a wide range of object features. This has motivated models of ensemble perception as an early process in vision, providing an initial sense of …
Mood Effects And Individual Differences On Reappraisal And Distraction: An Erp Study Of The Sensitivity Of Emotion Regulation Strategies, Elsa Mastico
All Master's Theses
The present research evaluated the effect of mood and individual differences on the regulatory process of emotions by using a regulation task with negative and neutral images to assess reappraisal and distraction ability. Specifically, this research evaluated the average amplitude of the latent positive potential (latent positivity, LPP) brainwave linked to distraction and reappraisal using an ERP analysis. In addition, the current study compared the modulation of the LPP to the self-reported mood of the participants and their individual differences in regulation ability through scores of a self-report emotion regulation questionnaire. The latent positive potentials from an emotion regulation task …
Mechanisms Of Value-Biased Prioritization In Fast Sensorimotor Decision Making, Kivilcim Afacan-Seref
Mechanisms Of Value-Biased Prioritization In Fast Sensorimotor Decision Making, Kivilcim Afacan-Seref
Dissertations and Theses
In dynamic environments, split-second sensorimotor decisions must be prioritized according to potential payoffs to maximize overall rewards. The impact of relative value on deliberative perceptual judgments has been examined extensively, but relatively little is known about value-biasing mechanisms in the common situation where physical evidence is strong but the time to act is severely limited. This research examines the behavioral and electrophysiological indices of how value biases split-second perceptual decisions and the possible mechanisms underlying the process. In prominent decision models, a noisy but statistically stationary representation of sensory evidence is integrated over time to an action-triggering bound, and value-biases …
Visual Modulation Of Resting State Α Oscillations, Kelly Webster, Tony Ro
Visual Modulation Of Resting State Α Oscillations, Kelly Webster, Tony Ro
Publications and Research
Once thought to simply reflect passive cortical idling, recent studies have demonstrated that α oscillations play a causal role in cognition and perception. However, whether and how cognitive or sensory processes modulate various components of the α rhythm is poorly understood. Sensory input and resting states were manipulated in human subjects while electroencephalography (EEG) activity was recorded in three conditions: eyes-open fixating on a visual stimulus, eyes-open without visual input (darkness), and eyes-closed without visual input (darkness). We show that α power and peak frequency increase when visual input is reduced compared to the eyes open, fixating condition. These results …
Changes In Cortical Processing Following Unilateral Visual Cortex Deafferentation, Matthew Gannon
Changes In Cortical Processing Following Unilateral Visual Cortex Deafferentation, Matthew Gannon
Graduate Theses and Dissertations
After the loss of inputs, cells in visual cortex adapt and begin representing space beyond their classical receptive fields. This ability for functional reorganization is a phenomenon known as neuroplasticity. Homonymous hemianopia is a unique case of this scenario that results from hemispheric deafferentation, or when all visual inputs in to one hemisphere of the brain are lost. This condition occurs due to unilateral damage of the post-chiasmatic geniculo-striate pathway, the network that carries visual information from one side of visual space to the visual cortex for processing. Damage to this pathway causes perceptual blindness in the side of space …
Visual Entrainment Of Perception-Related Neural Oscillations As A Mechanism For Maintaining Rhythmic Temporal Expectations Across A Wide Range Of Frequencies, Michael James Gray
Visual Entrainment Of Perception-Related Neural Oscillations As A Mechanism For Maintaining Rhythmic Temporal Expectations Across A Wide Range Of Frequencies, Michael James Gray
Dissertations, Theses, and Capstone Projects
Visual sensitivity fluctuates rhythmically, in-synch with ongoing, EEG-recorded neural oscillations across a wide range of frequencies (~1-25hz). Some recent work has suggested that these perception-related neural oscillations can be entrained by rhythmic visual stimulation. Evidence is also emerging that the entrainment of ongoing oscillations in visual and auditory cortices is involved in rhythmic temporal expectations. In the introduction chapter, I attempt to bridge these bodies of literature and hypothesize that rhythmic visual stimuli automatically entrain ongoing, perception-related neural oscillations and that this mechanism supports the maintenance of rhythmic temporal expectations. Chapters 2 and 3 address this hypothesis from different angles. …
Neural Correlates Of Automatic Emotional Processing And Emotion Regulation In Empathy And Psychopathy-Related Coldheartedness, Danielle Difilipo
Neural Correlates Of Automatic Emotional Processing And Emotion Regulation In Empathy And Psychopathy-Related Coldheartedness, Danielle Difilipo
Dissertations, Theses, and Capstone Projects
Psychopathy is a personality disorder that is defined, in part, by a lack of empathy. Psychopathy-related empathic deficits have been associated with atypical behavioral and neural responses to emotional facial expressions. Although the mirror neuron system (MNS) has been implicated in empathy, very few studies have examined the role of MNS functioning as it pertains to empathy impairments in psychopathy. Moreover, there is very little empirical research regarding emotion regulation in psychopathy, and specifically whether emotional responses can be intentionally upregulated. The present study sought to clarify whether the MNS is functionally intact in adults with subclinical psychopathic traits, particularly …
Neurological Correlates Of The Dunning-Kruger Effect, Alana Lauren Muller
Neurological Correlates Of The Dunning-Kruger Effect, Alana Lauren Muller
Electronic Theses, Projects, and Dissertations
The Dunning-Kruger Effect is a metacognitive phenomenon in which individuals who perform poorly on a task believe they performed well, whereas individuals who performed very well believe their performance was only average. To date, this effect has only been investigated in the context of performance on mathematical, logical, or lexical tasks, but has yet to be explored for its generalizability in episodic memory task performance. We used a novel method to elicit the Dunning-Kruger Effect via a memory test of item and source recognition confidence. Participants studied 4 lists of words and were asked to make a simple decision about …
Differences In Stimulus-Response Prediction And Reorientation Of Attention Relative To Student Athletic Background, Madelyn Quirk, Jessica Green
Differences In Stimulus-Response Prediction And Reorientation Of Attention Relative To Student Athletic Background, Madelyn Quirk, Jessica Green
Senior Theses
Within the game of baseball, every hit, pitch, and catch, rely on a player’s ability to respond quickly and appropriately to the resulting play in a manner that allows them to be an asset on the field. The most successful athletes are those best able to allocate their attention to accomplish these goal-oriented tasks. To explore this attentional orientation, occipital neural recordings of alpha waves often show a preemptive shift in phase alignment according to temporal anticipations. Here we aimed to identify influences on voluntary attention using cueing paradigms to examine stimulus-response timing relative to validity and athletic background, while …
The Role Of Visual And Verbal Processes In False Memory Susceptibility On The Misinformation Effect, John E. Kiat
The Role Of Visual And Verbal Processes In False Memory Susceptibility On The Misinformation Effect, John E. Kiat
Department of Psychology: Dissertations, Theses, and Student Research
The goal of this dissertation is to investigate links between susceptibility to misinformation on the misinformation effect paradigm and individual differences in visual and verbal source monitoring ability. Results from four studies are reported. The first three studies assess links between individual differences in perceptual misinformation endorsement levels and visualization (Word-As-Picture) as well as verbalization (Picture-As-Word) errors on the memory test of a source monitoring task in which a set of objects were initially presented either as pictures or words during study. In Study 1, this picture-word source monitoring task and a misinformation effect paradigm, with a True/False test format, …
The Signature Of Undetected Change: An Exploratory Electrotomographic Investigation Of Gradual Change Blindness, John E. Kiat, Michael D. Dodd, Robert F. Belli, Jacob E. Cheadle
The Signature Of Undetected Change: An Exploratory Electrotomographic Investigation Of Gradual Change Blindness, John E. Kiat, Michael D. Dodd, Robert F. Belli, Jacob E. Cheadle
Department of Psychology: Faculty Publications
Neuroimaging-based investigations of change blindness, a phenomenon in which seemingly obvious changes in visual scenes fail to be detected, have significantly advanced our understanding of visual awareness. The vast majority of prior investigations, however, utilize paradigms involving visual disruptions (e.g., intervening blank screens, saccadic movements, “mudsplashes”), making it difficult to isolate neural responses toward visual changes cleanly. To address this issue in this present study, high-density EEG data (256 channel) were collected from 25 participants using a paradigm in which visual changes were progressively introduced into detailed real-world scenes without the use of visual disruption. Oscillatory activity associated with undetected …
Modeling The Neural Circuitry Underlying The Behavioral And Eeg Correlates Of Attentional Capture, Chloe Callahan-Flintoft, Brad Wyble
Modeling The Neural Circuitry Underlying The Behavioral And Eeg Correlates Of Attentional Capture, Chloe Callahan-Flintoft, Brad Wyble
MODVIS Workshop
The Reactive-Convergent Gradient Field model (R-CGF) is a unique approach to modeling spatial attention in that it links neural mechanisms to event related potentials (ERPs) from scalp EEG. This model was developed with the aim of explaining different, sometimes conflicting, findings in the attention literature. Specifically, this model address conflicting findings showing both simultaneous and serial deployment of attention. Another argument addressed by the model is whether attention to a location invokes a suppression of the spatial surround, or the selective inhibition of distractors. With the R-CGF, we have found that these results are not as incompatible as they appear …
The Effects Of Alpha Oscillations On Touch Perception And Visuo-Tactile Integration, Lei Ai
The Effects Of Alpha Oscillations On Touch Perception And Visuo-Tactile Integration, Lei Ai
Dissertations, Theses, and Capstone Projects
Previous studies have shown that touch perception and visuo-tactile integration have large inter-subject/intra-subject variations. For example, touch perception varies across trials and the temporal binding windows of visuo-tactile integration varies across subjects. I hypothesized that the variations might be due to the change of power, phase and peak frequency of brain alpha oscillations. In the first set of experiments, I examined whether the power and phase of alpha oscillations predict successful conscious touch perception. Near-threshold tactile stimuli were applied to the left hand while electroencephalographic (EEG) activity and fast signal optical imaging were recorded over the somatosensory cortex. Alpha power …
An Examination Of The Factors That Dictate The Relative Weighting Of Feedback And Feedforward Input For Speech Motor Control, Nichole E. Scheerer
An Examination Of The Factors That Dictate The Relative Weighting Of Feedback And Feedforward Input For Speech Motor Control, Nichole E. Scheerer
Theses and Dissertations (Comprehensive)
Speech is arguably the most important form of human communication. Fluent speech production relies on auditory feedback for the planning, execution, and monitoring of speech movements. Auditory feedback is particularly important during the acquisition of speech, however, it has been suggested that over time speakers rely less on auditory feedback as they develop robust sensorimotor representations that allow speech motor commands to be executed in a feedforward manner. The studies reported in this thesis recorded speaker’s vocal and neural responses to altered auditory feedback in order to explore the factors that dictate the relative importance of auditory feedback for speech …
The Electrophysiology Of Written Informal Language, Taylor S. Blaetz
The Electrophysiology Of Written Informal Language, Taylor S. Blaetz
Masters Theses & Specialist Projects
Language is an essential component of human behavior. It is ubiquitous, but more importantly, it is malleable and it is constantly changing. Part of the dynamic nature of informal communication is the introduction and adoption of new linguistic elements. Online communication provides a window into this informal public discourse; therefore, it may be useful for testing hypotheses about the processes underlying the acquisition and use of new words. The comprehension of informal language may lead to an understanding of how these new informal words are integrated into our mental lexicon. The current study was an electroencephalographic (EEG) investigation of the …
Electrophysiological Changes In P200 Latency And Amplitude Of Jittered Orientation Visual Integration Task In Healthy Participants: A Multi-Block Design Eeg Study, Monika M. Rozynski, Chi-Ming Chen
Electrophysiological Changes In P200 Latency And Amplitude Of Jittered Orientation Visual Integration Task In Healthy Participants: A Multi-Block Design Eeg Study, Monika M. Rozynski, Chi-Ming Chen
Honors Scholar Theses
Visual integration, the ability to fuse environmental information such as light, color, shades, and motion to form a representation of a whole cohesive higher-order visual image, is impaired in persons with schizophrenia. Little is known how the P200 component, an event-related potential (ERP) in the parieto-occipital region, is affected in persons with schizophrenia while they perform visual integration tasks, when compared to healthy persons. This study administered Gabor contours that varied in high and low degrees of orientational jitter through the Jitter Orientation Visual Integration (JOVI) task to investigate visual integration by analyzing latency and amplitude of the P200 component. …
Electrophysiological Changes Of N100 Latency And Amplitude In Healthy Participants Performing The Jitter Orientated Visual Integration Task: A Multi-Block Design Study, Fariya Naz
University Scholar Projects
The present study investigated the differences in processing during visual integration in healthy adults. The visual N100 indexes early visual discrimination and in this case, was hypothesized to show differences in both latency and amplitude depending on the level of difficulty which corresponds to orientational jitter in a visual integration task. Four blocks with pseudo-random levels of jitter were presented to participants in the Jitter Oriented Visual Integration (JOVI) task. Results looking at the Oz channel showed significant reduction in amplitude in the visual N100 during the more difficult levels condition of the task. The multi-block design, originally expected to …
Electrophysiological And Behavioral Working Memory Differences Between Musicians And Non-Musicians, Benjamin P. Richardson
Electrophysiological And Behavioral Working Memory Differences Between Musicians And Non-Musicians, Benjamin P. Richardson
All Master's Theses
The current study examines the P300 brainwave and working memory differences between musicians and non-musicians. Differences in aspects of recorded electrical brain activity have been used to quantify differences in updating processes of working memory possibly related to differences in amount of music experience. The current study is designed to partially replicate and enhance a method previously implemented in research describing how music experience may be associated with differences in visual processing as well auditory working memory and executive function. Behavioral data were collected using six standardized subtest measures of the TOMAL – II, followed by ERP recordings during a …