Master of Science / Department of Psychological Sciences / Michael E. Young / Although risky decision-making tasks present some a priori risk (i.e., base-rate), decision makers often have an opportunity to modify this level of risk through their behaviors. Broadly speaking, risk can be modified by assigning additional resources to an ongoing task or by engaging in specific risk-mitigation strategies before or after the risky decision is made. The modification of risk requires ongoing awareness of task demands, resource constraints, and risk-mitigation strategies that can be used to adapt behavior over time. This thesis explores risk modification that occurs during difficult tasks. Difficult tasks hold greater risks because they fall at the edge of the decision maker’s abilities and are likely to require a greater number of resources to overcome. As resources are engaged they become unavailable for other tasks or strategies to cope with changing task demands. I studied how individuals monitor risks and develop risk mitigation strategies using a videogame task designed to mirror contingencies that would be encountered in the real world. Results from two experiments that involve this task suggest that decision-makers adequately monitor and develop active strategies for dealing with risks. These strategies change over time and vary as a function of task difficulty and experience.

This research study investigated the effectiveness of child-centered group play therapy with children experiencing adjustment difficulties. Specifically, this study determined the effectiveness of child-centered group play therapy in: (a) improving self-concept, (b) reducing externalizing, internalizing, and overall behavior problems, (c) enhancing emotional and behavioral adjustment to the school environment, and (d) increasing self-control of kindergarten children experiencing adjustment difficulties. Also investigated were child-centered group play therapy effects on reducing parenting stress of the parents of kindergarten children experiencing adjustment difficulties. The experimental group consisted of 15 kindergarten children who received one 40-minute child-centered group play therapy session per week, for twelve weeks. Group facilitators were play therapists who were doctoral students at the University of North Texas. The control group consisted of the 14 kindergarten students that had been assigned to the control group in Baggerly's (1999) study. Before the group play therapy sessions began and after termination of the sessions: the researchers administered the Joseph Pre-School and Primary Self-Concept Screening Test; parents completed the Child Behavior Checklist-Parent Report, Self-Control Rating Scale, Filial Problem Checklist, and Parenting Stress Index; and teachers completed the Child Behavior Checklist-Teacher Report, Early Childhood Behavior Scale, and Self-Control Rating Scale. Although the general results of this study did not show statistically significant change due to child-centered group play therapy sessions, positive trends in the children's behavior, self-control, and self-concept were observed by the researcher, play therapists, and teachers. These trends and observations support the continued application of child-centered group play therapy with children experiencing adjustment difficulties. Several factors may have contributed to the lack of statistical significance demonstrated within this study. These factors include a) a small sample size; b) the sample was drawn from only one school; c) a minimum of interactions between therapists and teachers, and therapists and parents; d) two unforeseen and unfortunate events; and e) pre-existing strength and resilience of the children comprising the control group.

When students solve mathematics tasks, the tasks are commonly given as written text, usually consisting of natural language, mathematical notation and different types of images. This is one reason why reading and interpreting such texts are important parts of being mathematically proficient, at least within the school context. The ability utilized when dealing with aspects of mathematical text is denoted in this thesis as a mathematical reading ability; this ability is useful when reading mathematical language, for example, in task text. There is, however, a lack of knowledge of what characterizes this mathematical language, what students need to learn regarding the mathematical language, and exactly which mathematical language that tests should preferably assess. Therefore, the purpose of this thesis is to contribute to the knowledge of aspects of difficulty related to textual features in mathematics tasks. In particular, one aim is to distinguish between a difficulty that has to do with a mathematical ability and another that has not. Different types of text analyses are utilized to capture textural features that might be demanding for the students when reading and solving mathematics tasks. Aspects regarding vocabulary are investigated both in a literature review and in a study where corpora are used to analyse word commonness. Other textual analyses focus on textual features that concern mathematical notation and images, besides natural language. Statistical methods are used to analyse potential relations between the textual features of interest and both task difficulty and task demand on reading ability. The results from the research review are sparse regarding difficult vocabulary, since few of the reviewed studies analyses word aspects separately. Several of the analysed textual features are related to aspects of difficulty. The results show that tasks with more words that are uncommon both in a mathematical context and in an everyday context, may favour students with good reading ability rather than students with good mathematical ability. Another textual feature that is likely to be demanding for students, is if the task texts contains many meaning relations, for example, when several words refer to the same or similar object. These results have implications for the school practice both regarding textual features that are important from an educational perspective and regarding the construction of tests. The research does also contribute to an understanding of what characterizes a mathematical language.

Procedural Content Generation (PCG) and Dynamic Difficulty Adjustment (DDA) have been used separately in games to improve player experience. We explore using PCG and DDA together in a feedback loop to keep a player in the "flow zone." The central tenet of this work is a conjecture about how the shape of the performance versus difficulty curve changes at the boundaries of the flow zone. Based on this conjecture, we have developed an algorithm that detects when the player has left the flow zone and appropriately adjusts the difficulty to bring the gameplay back into flow, even as the skill of the player is changing. We developed a game-independent algorithm, implemented our algorithm for the open-source Infinite Mario Bros (IMB) game and conducted a user study that supports the hypothesis that players will enjoy the game more with DDA - PCG algorithm.

This study was conducted to investigate the eighth graders’ English learning difficulty in the Shi-Shi Junior High School. Based on the previous researchers’ similar points of view, it is concluded that students’ learning difficulty is associated with three dimensions, including the school factors, personal factors, and family factors. The three dimensions were related to students’ English learning difficulty. The research methods incorporated qualitative such as in-depth interviewing and quantitative methods such as descriptive statistics and T-test. 120 students participated in the survey, and ten students and three teachers took part in the in-depth interviewing. According to the result, such factors as the teachers’ teaching and explaining ways and their shortage of interest in English have led to students’ English learning difficulty. Female students are bombarded with more English learning difficulty associated with emotional problems such as their bias toward their English teachers and parents’ expectation. Students retrogressing in the junior high school encounter more English learning difficulty, including the gap between their English learning in the elementary school and that in the junior high school and their parents’ expectation. Too many exams, the usage of the present English textbook, the learning gap, students’ shortage of interest in English learning, their previous learning experience of failure, and their learning pressure contributed to the English learning difficulty of students with lower achievement. Suggestions are offered based on the research consequence.

The present study was designed to investigate the effects of divergent production activities with math inquiry and think aloud strategy of students with math difficulty. Multiple baseline across behaviors design was replicated across four participants. This research also investigated relationships between the interventions and creativity scores by employing pretest and posttest design as measured by the Torrance Tests of Creative Thinking (TTCT). The results varied with the participants and the interventions. The overall mean in all three treatments increased a mild degree based on descriptive statistics. All four participants showed a drastic variability in math problem solving. T-test results from the TTCT showed that there were significant differences in both fluency and flexibility scores. Elaboration and originality scores appeared unaffected since the instructions were mean in all three treatments increased to a mild degree based on descriptive statistics. All four primarily involved in fluency and flexibility creativity constructs. Originality was excluded as a measure and elaboration was not instructed intensely enough in the program. Conclusively, 5th grade students with math difficulty improved both think aloud and math inquiry scores based on visual/statistical inspection of Mean+Trend difference analysis. It was found that only math inquiry intervention was effective to a mild degree for three out of four participants. Fluency and flexibility scores increased as a result of divergent production activities, however not enough to say that overall creativity is fostered directly by the program. Issues emerged out of the math problem solving in terms of controlling variability and developing content materials for the instruction. Further research is needed to ascertain the effects of multiple interventions on students with math difficulty. Replications are needed to expand the findings to the development of viable instructions. Future study is also needed to use varied math inquiry skills and think aloud strategy in order to improve both problem solving ability and creativity associated with mathematics.

Current theoretical models of ADHD (i.e., Disinhibition Model: Barkley, 1997; Working Memory Model: Rapport et al., 2001) conceptualize ADHD as the disorder of executive function (EF) with some variation in their emphases on particular components of the broadly-defined EF (e.g., working memory vs. inhibition) and in their postulated relationships with ADHD symptoms. Although these models provide systematic accounts of the manifestation of ADHD, they have not been extensively tested from an empirical standpoint. Moreover, despite the fact that ADHD is highly comorbid with other additional conditions such as learning and behavioral problems and EF deficits are found in individuals with these conditions as well as in those with ADHD, current EF models have not specified the developmental relationship between ADHD and its comorbid conditions. This study was: (1) to examine the extent to which two current models of ADHD are supported in a sample of 102 adults; (2) to present an ??integrated?? model by combining two current models of ADHD and linking them to recent research findings on two common comorbid conditions with ADHD (i.e., reading difficulty and substance abuse); and (3) to test and revise such an integrated model in the light of data using a latent variable analysis. Major findings provided a strong support for the Working Memory Model with a lesser degree of support for the Disinhibition Model. Preliminary evidence of working memory as the primary deficit in ADHD was also obtained in the present sample. Finally, the integrated EF model and its revised model (final model) demonstrated a very good fit to the data. These findings suggest that the integrated model provides a unified account of how EF deficits contribute to the manifestation of ADHD symptoms and comorbid conditions with ADHD. Given some limitations (e.g., sample size and scope) of the present study, current findings need to be replicated.

This study reports on technical program students’ approaches to solving open-ended problems during an introductory physics course in a Swedish upper secondary school. The study used case study methodology to investigate students’ activities in outdoor context. The findings come from observations and audio recordings of students solving three different open-ended problems. The results showed that the students had difficulties to formulate ‘solvable’ problems and to perform necessary ‘at home’ preparations to be able to solve the problems. Furthermore, students preferred to use a single solution method even though different solution methods were possible. This behavior can be attributed to their previous experience of solving practical problems in physics education. The result also indicated need of different levels of guidance to help the students in their problem solving process. A tentative conclusion can be made that open-ended problems have an educational potential for developing students’ understanding of scientific inquiry and problem solving strategies in the process of performing practical outdoor activities.

The present study was designed to investigate the effects of divergent production activities with math inquiry and think aloud strategy of students with math difficulty. Multiple baseline across behaviors design was replicated across four participants. This research also investigated relationships between the interventions and creativity scores by employing pretest and posttest design as measured by the Torrance Tests of Creative Thinking (TTCT). The results varied with the participants and the interventions. The overall mean in all three treatments increased a mild degree based on descriptive statistics. All four participants showed a drastic variability in math problem solving. T-test results from the TTCT showed that there were significant differences in both fluency and flexibility scores. Elaboration and originality scores appeared unaffected since the instructions were mean in all three treatments increased to a mild degree based on descriptive statistics. All four primarily involved in fluency and flexibility creativity constructs. Originality was excluded as a measure and elaboration was not instructed intensely enough in the program. Conclusively, 5th grade students with math difficulty improved both think aloud and math inquiry scores based on visual/statistical inspection of Mean+Trend difference analysis. It was found that only math inquiry intervention was effective to a mild degree for three out of four participants. Fluency and flexibility scores increased as a result of divergent production activities, however not enough to say that overall creativity is fostered directly by the program. Issues emerged out of the math problem solving in terms of controlling variability and developing content materials for the instruction. Further research is needed to ascertain the effects of multiple interventions on students with math difficulty. Replications are needed to expand the findings to the development of viable instructions. Future study is also needed to use varied math inquiry skills and think aloud strategy in order to improve both problem solving ability and creativity associated with mathematics.

Current theoretical models of ADHD (i.e., Disinhibition Model: Barkley, 1997; Working Memory Model: Rapport et al., 2001) conceptualize ADHD as the disorder of executive function (EF) with some variation in their emphases on particular components of the broadly-defined EF (e.g., working memory vs. inhibition) and in their postulated relationships with ADHD symptoms. Although these models provide systematic accounts of the manifestation of ADHD, they have not been extensively tested from an empirical standpoint. Moreover, despite the fact that ADHD is highly comorbid with other additional conditions such as learning and behavioral problems and EF deficits are found in individuals with these conditions as well as in those with ADHD, current EF models have not specified the developmental relationship between ADHD and its comorbid conditions. This study was: (1) to examine the extent to which two current models of ADHD are supported in a sample of 102 adults; (2) to present an ??integrated?? model by combining two current models of ADHD and linking them to recent research findings on two common comorbid conditions with ADHD (i.e., reading difficulty and substance abuse); and (3) to test and revise such an integrated model in the light of data using a latent variable analysis. Major findings provided a strong support for the Working Memory Model with a lesser degree of support for the Disinhibition Model. Preliminary evidence of working memory as the primary deficit in ADHD was also obtained in the present sample. Finally, the integrated EF model and its revised model (final model) demonstrated a very good fit to the data. These findings suggest that the integrated model provides a unified account of how EF deficits contribute to the manifestation of ADHD symptoms and comorbid conditions with ADHD. Given some limitations (e.g., sample size and scope) of the present study, current findings need to be replicated.