Effects of reinforcement learning on gaze following of gaze and head direction in early infancy: An interactive eye‐tracking study

The current four experiments investigated gaze following behavior in response to gaze and head turns in 4‐month‐olds and how reinforcement learning influences this behavior (N = 99). Using interactive eye tracking, infants’ gaze elicited an animation whenever infants followed a person’s head or gaze orientation (Experiment 1.1, 2.1 and 2.2) or looked at the opposite side (Experiment 1.2). Infants spontaneously followed the direction of a turning head with and without simultaneously shifted gaze direction (Cohen’s d: 0.93–1.05) but not the direction of isolated gaze shifts. We only found a weak effect of reinforcement on gaze following in one of the four experiments. Results will be discussed with regard to the impact of reinforcement on the maintenance of already existing gaze following behavior

Deaf and Hard of Hearing Readers and Science Comics: A Mixed Methods Investigation on Process

Deaf and hard of hearing (DHH) students bring diverse language and literacy backgrounds to the task of academic reading, which becomes increasingly complex and abstract in the upper grades. Teachers often differentiate their instruction by providing multimedia resources, of which students interact with verbal and pictorial information. A growing body of research supports multimedia learning; however, most of the studies have focused exclusively on learning outcomes, leaving teachers in the dark about the cognitive processes underlying these effects. This mixed methods study addresses this gap by using a nonfiction comic to investigate the reading processes of DHH 7th -12th grade students. Eye tracking and cued retrospective protocol were employed in a concurrent nested design to answer the question, how do DHH students read and learn from multimedia science texts? This study was guided by the cognitive theory of multimedia which states that reading comprehension is better supported when learning from words and pictures rather than words alone, especially when readers cognitively integrate the two representations to form a coherent mental model. Temporal and sequential eye tracking results revealed that readers’ transitions between related words and pictures were a statistically significant variable in explaining factual knowledge learning outcomes. These strategic shifts in attention were further explained by readers’ retrospective verbal reports of their thinking. Students’ descriptions of their vii reading processes were interpreted into the following themes: repairing, connecting representations, passive transitions, and connecting to self. The integration of quantitative and qualitative methods at the interpretation stage revealed that although the theme of repairing was equally distributed across all student reports, the theme of connecting representations was largely present in the reports from students who made high counts of integrative transitions. The major findings of this study align with the cognitive theory of multimedia, that students’ learning outcomes were significantly predicted by the deliberate strategies to cognitively integrate words and pictures to form and maintain a coherent mental model. The discussion includes ways in which teachers can capitalize on explicit modeling of these behaviors and employ students’ “think alouds” to better understand and support the development of effective multimedia reading processes

Learning new words: Memory reactivation as a mechanism for strengthening and updating a novel word´s meaning

In the present study we explored the post-learning changes in a novel word’s definition using a cue-induced memory reactivation. Native speakers of Spanish (N=373) learned low-frequency words with their corresponding definitions. The following day, reactivated groups were exposed to a reminder and provided a subjective assessment of reactivation for each word, while control groups did not receive a reactivation. Study A demonstrated that memory reactivation enhances both explicit recall and semantic integration of new meanings. Study B investigated the effect of memory reactivation in the modification of the new meanings, through three different experiments. Results show an improvement of the updated definitions according to each word´s reactivation strength. In addition, congruence with previous knowledge was suggested to be a boundary condition, while consolidation time had a positive modulatory effect. Our findings call attention to reactivation as a factor allowing for malleability as well as persistence of long-term memories for words.Fil: Laurino, Julieta. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Fisiología, Biología Molecular y Neurociencias. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Fisiología, Biología Molecular y Neurociencias; ArgentinaFil: Forcato, Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto Tecnológico de Buenos Aires; ArgentinaFil: Coaker, Nicole. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Fisiología, Biología Molecular y Neurociencias. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Fisiología, Biología Molecular y Neurociencias; ArgentinaFil: Pedreira, Maria Eugenia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Fisiología, Biología Molecular y Neurociencias. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Fisiología, Biología Molecular y Neurociencias; ArgentinaFil: Kaczer, Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Fisiología, Biología Molecular y Neurociencias. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Fisiología, Biología Molecular y Neurociencias; Argentin

Cognitive predictors of a common multitasking ability: Contributions from working memory, attention control, and fluid intelligence

Previous research has identified several cognitive abilities that are important for multitasking, but few studies have attempted to measure a general multitasking ability using a diverse set of multitasks. In the final dataset, 534 young adult subjects completed measures of working memory (WM), attention control, fluid intelligence, and multitasking. Correlations, hierarchical regression analyses, confirmatory factor analyses, structural equation models, and relative weight analyses revealed several key findings. First, although the complex tasks used to assess multitasking differed greatly in their task characteristics and demands, a coherent construct specific to multitasking ability was identified. Second, the cognitive ability predictors accounted for substantial variance in the general multitasking construct, with WM and fluid intelligence accounting for the most multitasking variance compared to attention control. Third, the magnitude of the relationships among the cognitive abilities and multitasking varied as a function of the complexity and structure of the various multitasks assessed. Finally, structural equation models based on a multifaceted model of WM indicated that attention control and capacity fully mediated the WM and multitasking relationship

The hippocampus reevaluated in unconscious learning and memory: at a tipping point?

Classic findings from the neuropsychological literature invariably indicated that performances on tests of memory that can be accomplished without conscious awareness were largely spared in amnesia, while those that required conscious retrieval (e.g., via recognition or recall) of information learned in the very same sessions was devastatingly impaired. Based on reports of such dissociations, it was proposed that one of the fundamental distinctions between memory systems is whether or not they support conscious access to remembered content. Only recently have we come to realize that the putative systemic division of labor between conscious and unconscious memory is not so clean. A primary goal of this review is to examine recent evidence that has been advanced against the view that the hippocampus is selectively critical for conscious memory. Along the way, consideration is given to criticisms that have been levied against these findings, potential explanations for differences in the reported results are proposed, and methodological pitfalls in investigations of unconscious memory are discussed. Ultimately, it is concluded that a tipping point has been reached, and that while conscious recollection depends critically on hippocampal integrity, the reach of the hippocampus extends to unconscious aspects of memory performance when relational memory processing and representation are required

A Case Study of the Preventing Academic Failure Orton-Gillingham Approach With Five Students Who Are Deaf or Hard of Hearing: Using the Mediating Tool of Cued Speech

Struggling deaf readers, like struggling readers with dyslexia, share similarities in their difficulty with phonemic awareness, decoding, fluency, vocabulary, and comprehension. Orton-Gillingham instruction is used to remediate these difficulties among hearing readers, but data is needed on its effectiveness with deaf students. Five subjects, who were severely deaf or hard of hearing, participated in a year long case study analyzing the impact of an Orton-Gillingham approach, supported with Cued Speech, on the development of their reading skills. Participants ranged from kindergarten to Grade 5, had additional learning, language, and socioeconomic challenges, and were mainstreamed in a public school district. Data were obtained in the fall, winter, and spring of one academic year from assessments (DRA, DIBELS, PAF), interviews with classroom teachers, and field notes. Results demonstrated that all five students made a year of growth, or more, on their reading achievement, similarly to expected yearly progress of students without disabilities. Results indicated that Orton-Gillingham instruction, supported with Cued Speech, may mitigate reading challenges among severely deaf or hard of hearing students in the mainstream. Additional studies are needed to verify the results in different educational settings

Lever Press Duration as a Measure of Frustration Motivated Response Variation in Rat Self-administration to Investigate the Effects of Frustration on Substance Use Behavior

In human studies, frustration has been identified as a potential risk factor for substance use disorders. Currently, there is little research into the role of frustration in substance use disorders despite research showing that frustration tolerance in humans is associated with a lower likelihood of developing substance use problems, better outcomes in recovery, and fewer relapses. To address this need, our studies use rat self-administration models to focus on frustration-related behavior in natural reward and addiction-related behavioral procedures. First, to study frustration in operant responding, there is a need to establish a real-time objective measure and validate its use in predicting vulnerability to drug use. Frustration is when a subject cannot achieve a reinforcer, receives less than the anticipated reinforcer, or has to work harder to achieve a reinforcer. Therefore, the measure of frustration should increase in instances consistent with the definition of frustration. Furthermore, the operant measure of frustration should assess a form of either the approach or avoidance responses to frustration. Increases in bar press durations are shown to be an approach strategy that can be used to measure frustration-related behavior objectively and, in some conditions, has the potential to signal a future transition to avoidance strategies. Supplementary experiments solidify that changes in bar press durations are a modification of continued approach behavior that can be used to objectively measure frustration-related behavior by satisfying nine behavioral criteria for barpress durations to measure frustration. Additional experiments established the predictive validity of identifying individual differences in frustration-like behavior as measured by bar press durations prior to drug self-administration. This work also affirms bar press durations as the optimal measure of frustration-like behavior within operant self-administration compared to the force of a bar press as a potential alternative approach response variation. Essentially, the results within this dissertation solidify bar press durations as an effective measure of frustration-like behavior to further elucidate the understanding of frustration within substance use disorders

Examination of cue-induced nicotine withdrawal among humans

There is copious research investigating the effect of environmental cues on the maintenance of drug behavior in animals, but sparse data exist with regard to humans. In our study, we examined 6 dependent cigarette smokers from James Madison University. We paid participants to use novel lighters that served as audible/tactile cues. After 2 weeks, participants returned to the lab satiated with nicotine for their testing session in which they were presented with the same cue and immediately completed a multiple-choice procedure (MCP) that measured their preferences by offering choices regarding money or the ability to take a cigarette break. Results showed no significant relationship between cue presentation and choice preference across the three conditions until current craving state was withheld as a covariate

The cognitive neuroscience of visual working memory

Visual working memory allows us to temporarily maintain and manipulate visual information in order to solve a task. The study of the brain mechanisms underlying this function began more than half a century ago, with Scoville and Milner’s (1957) seminal discoveries with amnesic patients. This timely collection of papers brings together diverse perspectives on the cognitive neuroscience of visual working memory from multiple fields that have traditionally been fairly disjointed: human neuroimaging, electrophysiological, behavioural and animal lesion studies, investigating both the developing and the adult brain