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311 Matching Results
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Coping with Severe, Acute Psychological Trauma: the Killeen Shooting Incident
The present study examined the relationship between coping and psychological and psychosomatic distress of 25 individuals who experienced the same severe, acute traumatic event: the violent shooting that killed 23 people and severely injured 20 more in Luby's Cafeteria in Killeen, Texas, on October 16, 1991. Distress was assessed by one-month pre-event and post-event scores on the SCL-90R, Psychosomatic Questionnaire, and by a Life Event Questionnaire score for the year before the incident. Coping was measured by a modified version of the Ways of Coping Scale (Folkman et al., 1986) and Response Style Questionnaire (Nolen-Hoeksema & Morrow, 1991). All post-event distress scores, except the Psychosomatic score, significantly increased over their corresponding pre-event scores regardless of gender. Although female distress scores were consistently higher than male scores, gender was predictive of post-event distress only for the SCL-90R Anxiety, Somatization, and Global Severity Index scales. The only pre-event score found to be predictive of post-event distress was the Psychosomatic scale. Regression analysis, with demographic and pre-event variables controlled, found a significant positive relationship between Escape/Avoidance coping and one-month post-event levels of Anxiety and Psychosomatic distress. Findings were discussed in the context of the process-oriented stress-illness model and were compared to current disaster …
Date:
August 1994
Creator:
Forté, Beverly K.
System:
The UNT Digital Library
Critical Power as a Predictor of Performance in a Bicycle Time Trial
Certain measures of aerobic power have been shown to have a high relationship with endurance performance. Critical power (CP) has also been shown to be well correlated to endurance performance, but few studies have evaluated its use in a competitive scenario. In this study, cardiorespiratory-metabolic measures were evaluated in 13 highly trained cyclists to determine their relationship to performance in a 17 km time trial. Critical power, determined from the nonlinear power-time model, was also evaluated to determine its relationship to performance in a 17 km time trial. Results indicate that the traditional indicators of V02max and ventilatory anaerobic threshold were well correlated to TT performance (r=-0.86, r=-0.79, respectively). The principal finding from this study was that performance in a bicycle time trial is related to CP at least as well as to cardiorespirator-ymetabolic measures. In fact, the results fromthis study suggest that the relationship between performance and CP is stronger (r=-0.89). Use of the critical power concept is attractive because testing requires only a cycle ergometer and a stopwatch to estimate a parameter of aerobic fitness.
Date:
December 1994
Creator:
Dangelmaier, Brian (Brian S.)
System:
The UNT Digital Library
Current Conservative Religious Attitudes Toward Seeking Professional Counseling
This study was designed to investigate the function of an individual's level of Christian conservatism and one's current attitude toward seeking professional psychotherapeutic help.
Date:
August 1994
Creator:
Roberts, Charles T. (Charles Thomas), 1941-
System:
The UNT Digital Library
Cycles and Cliques in Steinhaus Graphs
In this dissertation several results in Steinhaus graphs are investigated. First under some further conditions imposed on the induced cycles in steinhaus graphs, the order of induced cycles in Steinhaus graphs is at most [(n+3)/2]. Next the results of maximum clique size in Steinhaus graphs are used to enumerate the Steinhaus graphs having maximal cliques. Finally the concept of jumbled graphs and Posa's Lemma are used to show that almost all Steinhaus graphs are Hamiltonian.
Date:
December 1994
Creator:
Lim, Daekeun
System:
The UNT Digital Library
Depression and Heart Rate Variability in Patients with Coronary Artery Disease
Depression is an independent risk factor for morbidity and mortality in patients with coronary artery disease (CAD). Altered autonomic nervous system (ANS) activity, a common feature of depression, is also a risk factor for cardiac events in patients with CAD. Heart rate variability (HRV) reflects ANS activity, and reduced HRV predicts morbidity in cardiac populations. The purpose of this study was to determine whether differences in HRV exist between depressed and nondepressed patients with CAD. Twenty-one depressed inpatients, with angiographically documented CAD were retrospectively matched to 21 nondepressed CAD patients by sex, age, and smoking status. Demographic, medical, psychological interview data, and 24-hour ECG recordings were obtained. Depressed subjects had significantly lower HRV, or trends toward lower HRV, than nondepressed subjects, even after controlling for severity of CAD. Subject groups did not differ on left ventricular ejection fraction, history of myocardial infarction, or any other relevant medical variable assessed. These results suggest that depression is associated with decreased HRV in patients with CAD, and may help to explain the increased rates of cardiac events observed in CAD patients with depression.
Date:
December 1994
Creator:
Saunders, Roger D. (Roger Dean)
System:
The UNT Digital Library
The Development and Validation of the College Student Attitude Toward Female Victims of Domestic Violence (CSAVDV) Scale
The purpose of this study was to develop and validate the College Student Attitude Toward Female Victims of Domestic Violence Scale. Procedures used were a 12-day test-retest for reliability, experts assessment for face validity, and a principal component factor analysis for construct validity. Cronbach's alpha for test-retest reliability was .86.
Date:
December 1994
Creator:
Wilson, Leanne S. (Leanne Sue)
System:
The UNT Digital Library
Dielectric Relaxation of Aqueous Solutions at Microwave Frequencies for 335 GHz. Using a Loaded Microwave Cavity Operating in the TM010 Mode
The frequency dependence and temperature dependence of the complex dielectric constant of water is of great interest. The temperature dependence of the physical properties of water given in the literature, specific heat, thermal conductivity, electric conductivity, pH, etc. are compared to the a. c. (microwave) and d. c. conductivity of water with a variety of concentration of different substances such as HC1, NaCl, HaS04, etc. When each of these properties is plotted versus inverse absolute temperature, it can be seen that each sample shows "transition temperatures". In this work, Slater's perturbation equations for a resonant microwave cavity were used to analyze the experimental results for the microwave data.
Date:
August 1994
Creator:
Wang, Henry F. S. (Henry Fu-Sen)
System:
The UNT Digital Library
Differences between Acknowledged and Unacknowledged Rape: Occurrence of PTSD
This study examined the relation between level of rape acknowledgement and levels of PTSD symptoms reported in female college students. Subjects were administered the Sexual Experiences Survey (SES), the PTSD Interview, and a demographics questionnaire. Subjects were then grouped into the following categories based on their responses to the SES: reported rape victims, acknowledged rape victims, unacknowledged rape victims, and a control group of non-rape subjects. Small sample analyses did not reveal the expected linear relation between the two variables. Only the acknowledged group showed greater PTSD symptoms. The unacknowledged and control groups did not significantly differ on overall PTSD symptom severity, or on any cluster of PTSD symptoms. Naturalistic selection factors are discussed that could have affected the outcome of the study.
Date:
August 1994
Creator:
Ovaert, Lynda B.
System:
The UNT Digital Library
Diffusion Kinetics and Microstructure of Eutectic and Composite Solder/Copper Joints
Sn/Pb solders are widely used by the electronics industry to provide both mechanical and electrical interconnections between electronic components and printed circuit boards. Solders with enhanced mechanical properties are required for high reliability for Surface Mount Technology (SMT) applications. One approach to improve the mechanical properties of solder is to add metallic or intermetallic particles to eutectic 63Sn/37Pb solder to form composite solders. Cu6Sn5 and Cu3Sn form and grow at the solder/copper substrate interface. The formation and growth of these intermetallics have been proposed as controlling mechanisms for solderability and reliability of solder/copper joints. The goal of this study was to investigate the diffusion kinetics and microstructures of six types of composite solder/copper joints.
Date:
May 1994
Creator:
Wu, Yujing
System:
The UNT Digital Library
Discovery and Characterization of Two Tn5 Generated pyrA Mutants in Pseudomonas putida and the Generation of Hfr Strains
A pyrA mutation in Pseudomonas putida was isolated using transposon mutagenesis for the first time. Transposon Tn5 was used to inactivate the pyrA gene for carbamoylphosphate synthetase in these mutants. Accordingly, these mutants were defective in pyrimidine and arginine biosynthesis. The suicide vector, pM075, from Pseudomonas aeruginosa, was used to introduce the transposon into the cells. Tn5 was subsequently used to supply homology so that the plasmid pM075 could be introduced in its entirety into the Pseudomonas putida chromosome at the locus of the Tn5 insertion in the pyrA gene. Consequently, these strains exhibited high frequency of recombination and were capable of chromosome mobilization.
Date:
August 1994
Creator:
Liljestrand, Laura Gail
System:
The UNT Digital Library
Dissociation and Post-Traumatic Stress Disorder in Women Who Have Experienced Trauma and Sexual Assault
The relation between dissociative symptoms and posttraumatic stress disorder (PTSD) was investigated in women who had experienced trauma or sexual assault. Subjects were administered the Dissociative Experiences Scale (DES), the Sexual Experiences Scale (SES), and the PTSD Interview (PTSD-I). Subjects were grouped according to their scores on the SES and the PTSD-I. Analysis of variance revealed a relation between DES scores and PTSD symptom severity scores. Correlational analyses showed a relation between dissociative symptoms and PTSD symptom severity but not recency of trauma. Three factors from a previously published factor analysis of the DES were found to contribute to the DES scores of PTSD subjects.
Date:
August 1994
Creator:
Baldwin, Carol L. (Carol Louise)
System:
The UNT Digital Library
Dual Factor Socially Desirable Responding and Contrasts in Intrinsic and Extrinsic Religious Motivation
A follow-up was done to Leak and Fish's (1989) study of intrinsically and extrinsically religious individuals using Paulhus' (1984) Balanced Inventory of Desirable Responding, a two factor scale of socially desirable responding measuring self-deceptive enhancement (SDE) and impression management (IM). 275 introduction to psychology students were group tested and categorized by gender and by religious orientation with Allport and Ross's (1967) fourfold Religious Orientation Scale (ROS). Differences between the four types were hypothesized on the religious relevance of the SDE and IM scale items. A difference score was also computed by contrasting two instructional sets on the BIDR as a measure of variation across situations. Measures of private and public self-consciousness, social anxiety, fear of negative evaluation, and self esteem were included.
Date:
December 1994
Creator:
McKay, Brock L. (Brock Lindsay)
System:
The UNT Digital Library
Early Childhood Educators' Beliefs and Practices about Assessment
Standardized tests are being administered to young children in greater numbers in recent years than ever before. Many more important educational decisions about children are being based on the results of these tests. This practice continues to escalate despite early childhood professional organizations' calls for a ban of standardized testing for children eight years of age and younger. Many early childhood educators have become dissatisfied with multiple-choice testing as a measure of student learning and are increasingly using various forms of alternative assessment to replace the more traditional testing formats. Teachers seem to be caught in the middle of the controversy between standardized testing and alternative assessment. This research examined what early childhood educators in one north Texas school district believe about assessment of young children and what assessment methods they report using in their classrooms, as well as factors which influence those beliefs and practices. The sample for this study was 84 teachers who taught prekindergarten through third grade. An eight-page questionnaire provided quantitative data and interviews and the researcher's journal provided qualitative data.
Date:
May 1994
Creator:
Diffily, Deborah
System:
The UNT Digital Library
Early Educational Reform in North Germany: its Effects on Post-Reformation German Intellectuals
Martin Luther supported the development of the early German educational system on the basis of both religious and social ideals. His impact endured in the emphasis on obedience and duty to the state evident in the north German educational system throughout the early modern period and the nineteenth century. Luther taught that the state was a gift from God and that service to the state was a personal vocation. This thesis explores the extent to which a select group of nineteenth century German philosophers and historians reflect Luther's teachings. Chapters II and III provide historiography on this topic, survey Luther's view of the state and education, and demonstrate the adherence of nineteenth century German intellectuals to these goals. Chapters IV through VII examine the works respectively of Johann Gottfried Herder, Georg Wilhelm Friedrich Hegel, Leopold von Ranke, and Wilhelm Dilthey, with focus on the interest each had in the reformer's work for its religious, and social content. The common themes found in these authors' works were: the analysis of the membership of the individual in the group, the stress on the uniqueness of individual persons and cultures, the belief that familial authority, as established in the Fourth Commandment, provided the …
Date:
December 1994
Creator:
Peterson, Rebecca C. (Rebecca Carol)
System:
The UNT Digital Library
The Effect of Ambiguity on Peak Weightlifting Performance : A Study of Experienced Weightlifters
Recent studies in the area of sport and exercise science have suggested that weightlifting performance may be significantly improved under ambiguous conditions—namely, when the amount to be lifted is unknown. In the present study, procedural concerns from previous studies examining the effect of ambiguity were noted and a methodological variation was introduced.
Date:
December 1994
Creator:
Rattan, Randall Hampton
System:
The UNT Digital Library
The Effect of Certain Modifications to Mathematical Programming Models for the Two-Group Classification Problem
This research examines certain modifications of the mathematical programming models to improve their classificatory performance. These modifications involve the inclusion of second-order terms and secondary goals in mathematical programming models. A Monte Carlo simulation study is conducted to investigate the performance of two standard parametric models and various mathematical programming models, including the MSD (minimize sum of deviations) model, the MIP (mixed integer programming) model and the hybrid linear programming model.
Date:
May 1994
Creator:
Wanarat, Pradit
System:
The UNT Digital Library
Effect of Firm Size on Female Earnings
There are various factors effecting females' wage level such as marital status, occupation, education, and experience. This paper also includes firm size and answers the questions: What effect does firm size have on female earnings? Is that effect different for black than white females?
Date:
May 1994
Creator:
Cengizoglu, Gonca
System:
The UNT Digital Library
The Effect of Graphing Calculators in Algebra II Classrooms: A Study Comparing Achievement, Attitude, and Confidence
The purpose of this study was to investigate the effectiveness of the graphing calculator on the achievement, attitude toward mathematics, and confidence in learning mathematics of Algebra II students.
Date:
August 1994
Creator:
Scott, Beverly (Beverly Ann)
System:
The UNT Digital Library
The Effect of Hand-Held Weights and Exaggerated Arm Swing on Heart Rate, Blood Pressure, and Ratings of Perceived Exertion during Submaximal Walking
The purpose of this study was to investigate the effect of hand-weights and exaggerated arm swing on heart rate, blood pressure, and ratings of perceived exertion during submaximal walking. Twenty middle-aged (40- 59 years) female volunteers were given four submaximal treadmill tests at 3.0 mph and 0 grade. The four treatment conditions were as follows: 1) walking with unexaggerated arm swing (AS); 2) walking with unexaggerated arm swing with hand-held weights (ASHW); 3) walking with exaggerated arm swing (EAS), and 4) walking with exaggerated arm swing with hand-held weights (EASHW). The testing sequence was randomized and a minimum of 48 hr was given between tests.
Date:
December 1994
Creator:
Austen, Karen Christine
System:
The UNT Digital Library
The Effect of Professional Development in Performance Assessment on Mathematics Achievement and Attitude
The problem of this study was to determine the effect of professional development in the use of performance assessment in fourth grade mathematics on student achievement and attitude toward mathematics. Achievement was measured by subtest and total mathematics scores on norm-referenced and criterion-referenced tests. Attitude was measured by a survey of student attitudes.
Date:
May 1994
Creator:
McAdoo, Penny Coyne
System:
The UNT Digital Library
Effect of Small Group Incentives on Sales Productivity in Two Retail Shops: A Case Study
To meet global competition many companies have reorganized work process systems, eliminated management levels, formed employee work groups and implemented variable compensation systems. This study investigated the effect of group incentives on individual sales performance in two specialty shops located in a large metropolitan hotel. Two questions were addressed: What effect would adding a group bonus plan have on individual employee's sales performance who had previously received hourly wages in one shop; and, what effect would changing an individual incentive plan to a group plan have on the individual employee's sales performance in the other shop. In one shop 5 of 7 employees' productivity increased: in the other, 1 of 3 subjects' productivity increased. Contingencies in both shops are analyzed and suggestions offered for future research.
Date:
May 1994
Creator:
Bohrer, Kathleen
System:
The UNT Digital Library
Effect of the Home Environment on Children's 10 Scores and the Influence of Family Socioeconomic Status
Contributions of home environment and family socioeconomic status (SES) on the intelligence test performance of 24 exceptional children aged five through seven years were investigated. It was hypothesized that higher SES would enrich the children's environment providing a more stimulating learning experience, and would reflect a positive correlation with measures of the home environment. Additional hypotheses were that both HOME scores and SES scales would show a positive correlation with intelligence test performance. The positive association found between SES and HOME Inventory scores suggests that families with a higher SES have the ability to direct more resources toward their children. However, according to the present study, this does not affect the intelligence test performance of exceptional children.
Date:
May 1994
Creator:
Singer, David D.
System:
The UNT Digital Library
The Effect of the Use of Laser Video Disc on Achievement, Attitude, and Confidence of High School Biology Students
The purpose of the study was to determine the effects of level III video disc instruction on high school biology students. There were three areas studied: students' achievement in biology, students' attitude toward biology, and confidence. The experimental group consisted of 70 biology students. The control group also consisted of 70 biology students. The teacher of the experimental group used level in video disc instruction to teach about invertebrates, vertebrates, human systems, and plants throughout the semester. The teachers of the control group taught the same topics during the same period using the traditional lecture method and without level III video disc instruction. Students took the Biology Achievement Test, the Purdue Master Attitude Scale, and the Confidence in Learning Inventory before and after the treatment period. A t-test on the pretest scores of the experimental group and the control group showed no significant difference between the two groups. The experimental group also took the Technology Preference Survey after the treatment period.
Date:
August 1994
Creator:
Garza, Federico (Federico Angel)
System:
The UNT Digital Library
The Effect of Verbal and Graphic Feedback on Direct Care Trainers' Data-Tecording Behavior
This study investigated the effects of verbal and graphic feedback alone and in combination with praise on the data-recording behavior of 12 direct care trainers (DCTs) who recorded their reinforcer deliveries as they interacted with mentally retarded clients. An additional variable examined was the effect of time of delivering feedback on subsequent data-recording behavior. Feedback was delivered by the experimenter. Correspondence checks were conducted and a three-phase multiple condition experimental design was used. All feedback conditions produced an observable difference in DCT data-recording behavior. Time of delivery of feedback also appeared to have an effect on the amount of data recorded by DCTs.
Date:
May 1994
Creator:
Morris, Timothy Jewlon
System:
The UNT Digital Library