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.

This research study investigated the effectiveness of a child-centered play therapy intervention conducted by trained high school students on the behavior of preschool and kindergarten children with adjustment difficulties. Specifically, this research determined if play sessions conducted by high school students trained in child-centered play therapy skills and procedures facilitated change in the children's behaviors. The experimental group children (N=14) each received 20 weekly individual play sessions from a high school student enrolled in a Peer Assistance and Leadership class. The high school students were randomly paired with a referred child. The high school students completed 7 one-hour training sessions in child-centered play therapy procedures and skills prior to beginning the weekly, supervised play sessions. The control group (N=12) received no treatment during the study. Pre and post data were collected from parents who completed the Child Behavior Checklist (CBCL) and teachers who completed the Early Childhood Behavior Scale (ECBS). Multivariate analyses of variance of gained scored revealed statistical significance in 2 of the 4 hypotheses. Specifically, the children in the experimental group showed significant decreases in internalizing behaviors (p = .025) and total behaviors (p = .025) on the CBCL. Although not in the statistically significant range, positive trends were noted in externalizing behaviors on the CBCL (p = .07) and total behaviors on the ECBS (p = .056). All play sessions were conducted in the primary school that the children attended. The high school student facilitated play sessions helped to maximize the school counselor's time by meeting the needs of more students. Implications for school counselors are noted with suggestions for how to begin and maintain a similar program in schools. This study supports the use of child-centered play therapy by trained high school students as an effective intervention for helping young children with a variety of adjustment problems.

Endless runner (ER) is a game genre where the player controls a constantly running character. The player's enjoyment is closely tied to the difficulty of the game, which makes it an interesting platform for dynamic difficulty adjustment (DDA). DDA is a way of balancing game's difficulty by the use of computer-aided adjusting methods. First, we have developed an endless runner type of game using Unity and utilizing client-server architecture. Second, we have implemented a DDA system using player modeling and genetic algorithms. We have tested the validity of our approach on live users. We were able to adjust the game difficulty to increase player enjoyment and reduce player death rates in levels. This approach can be used in a production environment to improve players' enjoyment of endless runner games.