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- Creators: Arizona State University
- Member of: Theses and Dissertations
- Status: Published
Description
The purpose of this study was to investigate the effect of partial exemplar experience on category formation and use. Participants had either complete or limited access to the three dimensions that defined categories by dimensions within different modalities. The concept of "crucial dimension" was introduced and the role it plays in category definition was explained. It was hypothesized that the effects of partial experience are not explained by a shifting of attention between dimensions (Taylor & Ross, 2009) but rather by an increased reliance on prototypical values used to fill in missing information during incomplete experiences. Results indicated that participants (1) do not fill in missing information with prototypical values, (2) integrate information less efficiently between different modalities than within a single modality, and (3) have difficulty learning only when partial experience prevents access to diagnostic information.
ContributorsCrawford, Thomas (Author) / Homa, Donald (Thesis advisor) / Mcbeath, Micheal (Committee member) / Glenberg, Arthur (Committee member) / Arizona State University (Publisher)
Created2011
Description
This thesis describes a synthetic task environment, CyberCog, created for the purposes of 1) understanding and measuring individual and team situation awareness in the context of a cyber security defense task and 2) providing a context for evaluating algorithms, visualizations, and other interventions that are intended to improve cyber situation awareness. CyberCog provides an interactive environment for conducting human-in-loop experiments in which the participants of the experiment perform the tasks of a cyber security defense analyst in response to a cyber-attack scenario. CyberCog generates the necessary performance measures and interaction logs needed for measuring individual and team cyber situation awareness. Moreover, the CyberCog environment provides good experimental control for conducting effective situation awareness studies while retaining realism in the scenario and in the tasks performed.
ContributorsRajivan, Prashanth (Author) / Femiani, John (Thesis advisor) / Cooke, Nancy J. (Thesis advisor) / Lindquist, Timothy (Committee member) / Gary, Kevin (Committee member) / Arizona State University (Publisher)
Created2011
Description
This study investigated the role of broad cognitive processes in the development of mathematics skills among children and adolescents. The participants for this study were a subsample of a nationally representative sample used in the standardization of the Woodcock-Johnson III Tests of Cognitive Abilities and the Woodcock-Johnson III Tests of Achievement, Normative Update (Woodcock, McGrew, & Mather, 2007). Participants were between 5 years old and 18 years old (N = 4721; mean of 10.98 years, median of 10.00 years, standard deviation of 3.48 years), and were 50.7% male and 49.3% female. Structural equation models supported the theoretical suggestion that broad cognitive processes play significant and specific roles in the development of mathematical skills among children and adolescents. Implications for school psychology researchers and practitioners are discussed.
ContributorsCalderón, Carlos Oreste (Author) / Caterino, Linda (Thesis advisor) / Nakagawa, Kathryn (Thesis advisor) / Knight, George (Committee member) / Mcgrew, Kevin (Committee member) / Arizona State University (Publisher)
Created2012
Description
The present study explores the role of motion in the perception of form from dynamic occlusion, employing color to help isolate the contributions of both visual pathways. Although the cells that respond to color cues in the environment usually feed into the ventral stream, humans can perceive motion based on chromatic cues. The current study was designed to use grey, green, and red stimuli to successively limit the amount of information available to the dorsal stream pathway, while providing roughly equal information to the ventral system. Twenty-one participants identified shapes that were presented in grey, green, and red and were defined by dynamic occlusion. The shapes were then presented again in a static condition where the maximum occlusions were presented as before, but without motion. Results showed an interaction between the motion and static conditions in that when the speed of presentation increased, performance in the motion conditions became significantly less accurate than in the static conditions. The grey and green motion conditions crossed static performance at the same point, whereas the red motion condition crossed at a much slower speed. These data are consistent with a model of neural processing in which the main visual systems share information. Moreover, they support the notion that presenting stimuli in specific colors may help isolate perceptual pathways for scientific investigation. Given the potential for chromatic cues to target specific visual systems in the performance of dynamic object recognition, exploring these perceptual parameters may help our understanding of human visual processing.
ContributorsHolloway, Steven R. (Author) / McBeath, Michael K. (Thesis advisor) / Homa, Donald (Committee member) / Macknik, Stephen L. (Committee member) / Arizona State University (Publisher)
Created2011
Description
Introductory programming courses, also known as CS1, have a specific set of expected outcomes related to the learning of the most basic and essential computational concepts in computer science (CS). However, two of the most often heard complaints in such courses are that (1) they are divorced from the reality of application and (2) they make the learning of the basic concepts tedious. The concepts introduced in CS1 courses are highly abstract and not easily comprehensible. In general, the difficulty is intrinsic to the field of computing, often described as "too mathematical or too abstract." This dissertation presents a small-scale mixed method study conducted during the fall 2009 semester of CS1 courses at Arizona State University. This study explored and assessed students' comprehension of three core computational concepts - abstraction, arrays of objects, and inheritance - in both algorithm design and problem solving. Through this investigation students' profiles were categorized based on their scores and based on their mistakes categorized into instances of five computational thinking concepts: abstraction, algorithm, scalability, linguistics, and reasoning. It was shown that even though the notion of computational thinking is not explicit in the curriculum, participants possessed and/or developed this skill through the learning and application of the CS1 core concepts. Furthermore, problem-solving experiences had a direct impact on participants' knowledge skills, explanation skills, and confidence. Implications for teaching CS1 and for future research are also considered.
ContributorsBillionniere, Elodie V (Author) / Collofello, James (Thesis advisor) / Ganesh, Tirupalavanam G. (Thesis advisor) / VanLehn, Kurt (Committee member) / Burleson, Winslow (Committee member) / Arizona State University (Publisher)
Created2011
Description
Research on priming has shown that a stimulus can cause people to behave according to the stereotype held about the stimulus. Two experiments were conducted in which the effects of elderly priming were tested by use of a driving simulator. In both experiments, participants drove through a simulated world guided by either an elderly or a younger female voice. The voices told the participants where to make each of six turns. Both experiments yielded slower driving speeds in the elderly voice condition. The effect was universal regardless of implicit and explicit attitudes towards elderly people.
ContributorsFoster, L Bryant (Author) / Branaghan, Russell (Thesis advisor) / Becker, David (Committee member) / Cooke, Nancy J. (Committee member) / Arizona State University (Publisher)
Created2012
Description
Modern day driving continues to burgeon with attention detractors found inside and outside drivers' vehicles (e.g. cell phones, other road users, etc.). This study explores a regularly disregarded attention detractor experienced by drivers: self-regulation. Results suggest self-regulation and WMC has the potential to affect attentional control, producing maladaptive changes in driving performance in maximum speed, acceleration, and time headway.
ContributorsSinocruz, Jerome Q (Author) / Sanchez, Christopher A (Thesis advisor) / Branaghan, Russel J (Committee member) / Becker, David V (Committee member) / Arizona State University (Publisher)
Created2012
Description
ABSTRACT Approximately 3.5% of adolescents in the United States have chronic daily headache (CDH). Chronic daily headaches in adolescents are often refractory to the adult pharmacological interventions. And as a result, adolescents typically experience increased levels of stress, which exacerbates their headaches. Chronic daily headaches negatively impact both the adolescent and their family. Adolescents with CDHs frequently exemplify comorbid psychiatric symptoms such as anxiety, depression, and increased risk for suicide. Risk factors for CDH in adolescents have been well studied; however, few studies have focused on psychologically based interventions to enhance effective coping, positive mental health, and pain relief in this group of teens. Given the paucity of psychologically focused interventions in this group, further research is necessary to test and develop the effectiveness of cognitive behavioral skills building (CBSB) interventions. This pilot study focused on the use of a CBSB intervention that emphasized problem solving, cue recognition, effective communication, behavior modeling, cognitive reappraisal, stress management, effective coping, and positive thinking. A randomized controlled trial pilot study was conducted. The intervention group received a seven-week intervention focused on CBSB techniques and headache education, while the comparison headache education group received a seven-week program focused on basic headache hygiene measures (e.g., adequate sleep, adequate hydration, dietary triggers, environmental triggers). The total sample included 32 adolescents inclusive of the ages 13 and 17 years. Paired t-tests resulted in significant preliminary positive effects for COPE-HEP on anxiety, depression, beliefs, headache disability, headache frequency, and headache duration. Comparison group education resulted in significant preliminary positive effects on anxiety, depression, headache disability, headache frequency, headache pain level, headache duration, and medication frequency. There were no significant changes over time in means of parent perception of pain interference for both groups. Independent t-tests revealed that COPE-HEP teens had significantly less anxiety and headache duration at post-intervention. The acceptability of the COPE-HEP intervention with adolescents with CDHs in a specialty care setting is supported by this study, while the feasibility of conducting this study in a specialty care setting is partially supported. These findings support a need to refine the intervention and test both its short and long-term effects in a full-scale randomized controlled trial with adolescents who have CDHs.
ContributorsHickman, Carolyn (Author) / Melnyk, Bernadette M (Thesis advisor) / Jacobson, Diana (Thesis advisor) / Gance-Cleveland, Bonnie (Committee member) / Szalacha, Laura (Committee member) / Arizona State University (Publisher)
Created2012
Description
The purpose of this study was to investigate the impacts of visual cues and different types of self-explanation prompts on learning, cognitive load and intrinsic motivation, as well as the potential interaction between the two factors in a multimedia environment that was designed to deliver a computer-based lesson about the human cardiovascular system. A total of 126 college students were randomly assigned in equal numbers (N = 21) to one of the six experimental conditions in a 2 X 3 factorial design with visual cueing (visual cues vs. no cues) and type of self-explanation prompts (prediction prompts vs. reflection prompts vs. no prompts) as the between-subjects factors. They completed a pretest, subjective cognitive load questions, intrinsic motivation questions, and a posttest during the course of the experience. A subsample (49 out of 126) of the participants' eye movements were tracked by an eye tracker. The results revealed that (a) participants presented with visually cued animations had significantly higher learning outcome scores than their peers who viewed uncued animations; and (b) cognitive load and intrinsic motivation had different impacts on learning in multimedia due to the moderation effect of visual cueing. There were no other significant findings in terms of learning outcomes, cognitive load, intrinsic motivation, and eye movements. Limitations, implications and future directions are discussed within the framework of cognitive load theory, cognitive theory of multimedia learning and cognitive-affective theory of learning with media.
ContributorsLin, Lijia (Author) / Atkinson, Robert (Thesis advisor) / Nelson, Brian (Committee member) / Savenye, Wilhelmina (Committee member) / Arizona State University (Publisher)
Created2011
Description
There have been conflicting accounts of animation's facilitation in learning from instructional media, being at best no different if not hindering performance. Procedural motor learning represents one of the few the areas in which animations have shown to be facilitative. These studies examine the effects of instructional media (animation vs. static), rotation (facing vs. over the shoulder) and spatial abilities (low vs. high spatial abilities) on two procedural motor tasks, knot tying and endoscope reprocessing. Results indicate that for all conditions observed in which participants engaged in procedural motor learning tasks, performance was significantly improved with animations over static images. Further, performance was greater for rotations of instructional media that did not require participants to perform a mental rotation under some circumstances. Interactions between Media x Rotation suggest that media that was animated and did not require a participant to mentally rotate led to improved performance. Individual spatial abilities were found to influence total steps correct and total number of errors made in the knot tying task, but this was not observed in the endoscope task. These findings have implications for the design of instructional media for procedural motor tasks and provide strong support for the usage of animations in this context.
ContributorsGarland, T. B (Author) / Sanchez, Chris A (Thesis advisor) / Cooke, Nancy J. (Committee member) / Branaghan, Russel (Committee member) / Arizona State University (Publisher)
Created2012