The Trinity River flows through the Dallas-Ft. Worth Metroplex in north central Texas where it receives effluents from numerous point sources including seven large regional wastewater treatment facilities. Historically, the Trinity River has been impacted by massive wastewater loadings which often constitute > 80% of the total river discharge during low flow periods. Normally, high mass loadings correspond to the summer months, compounding the effects of a naturally stressful period, characterized by high temperatures and low dissolved oxygen concentrations. Samples from 12 stations were collected quarterly over an 18 month period from the Trinity River and two tributaries. Water samples were analyzed for a variety of water quality variables, including metals, priority pollutants, pesticides, and general water quality parameters. Water samples were also tested for acute and subchronic effects with several test species. Fish were collected at each station and assemblages were characterized using traditional classification techniques and the Index of Biotic Integrity. In addition, sediment samples were assessed for toxic effects which could have adversely impacted fish recruitment and in situ biomonitoring experiments were performed. Quantitative habitat characterization analyses were performed to gain additional information that could possibly explains differences in fish assemblage structure related to habitat variability. Data …

The problem with which this investigation was concerned is that of treating agoraphobia with cognitive-behavioral group therapy and cognitive-behavioral group therapy combined with the drug alprazolam (Xanax). The purpose of the research was twofold. The first goal was to determine the relative effectiveness of the two treatment conditions on phobic behavior, anxiety, and depression. A second goal was to analyze the results and make recommendations concerning each of these modalities available to agoraphobics, their families, and to treatment specialists. The research design of this study was a randomized, pretest-posttest, experimental group design. The sample (N = 15) consisted of Group I (N = 7), who received behavioral-cognitive group therapy combined with the medication alprazolam, and Group II (N = 8), who received behavioral-cognitive group therapy only. The treatment included 15, 2-hour weekly group sessions, with the addition of a brief medication evaluation prior to each group meeting for Group I. During these sessions, the subjects received information about agoraphobia in the form of brief didactic segments, treatment materials, homework assignments, group interaction, and various forms of desensitization. Based on the findings of this study, the following conclusions were drawn: 1. Multidimensional behavioral-cognitive group therapy can significantly reduce phobic avoidance, anxiety, …

The purpose of the study was to investigate independent piano teachers' view of themselves in the light of selected attributes found in sociological writings on the professions. The research problems were: (a) to determine the attitudes which independent piano teachers held toward selected professional attributes; (b) to determine the relationship between the attitudes toward the professional attributes and selected background variables; and (c) to determine the degree of association between these attributes. The problems were addressed by a questionnaire directed to independent piano teachers active in the area of Dallas-Ft. Worth, Texas. Thirty teachers were also interviewed to determine consistency of response and to explore issues which the questionnaire had raised. Reliability and validity were established at acceptable levels. Techniques of statistical analysis included Pearson's product-moment correlation, multiple regression, chi-square in conjunction with Cramer's V_, and factor analysis. The strongest attitudes expressed by the teachers in the study concerned professional self-image, altruism, client orientation, commitment to work, and independence. The most important background variables were age, years of experience, number of students, certification by a professional association, and college degree in music. A multiple regression analysis tested each variable against the dependent variable professional self-image; recognition by others, commitment to …

This study investigated the following with regard to technical-occupational students in a multi-campus urban community college: The enrollment patterns in required general education courses at specific intervals of course work; the relation between successful completion of certain required general education courses (English and mathematics) and academic success as measured by grade point average; and the profiles or basic characteristics (age, GPA, sex, and high school graduation status) of (a) the student who had completed a specified amount of general education course work and (b) the graduate who had attained a higher grade point average in technical course work than in general education course work. The data was obtained from the academic records of 328 current student, selected by established criteria, and 284 graduates of six technical-occupational programs. The six programs were chosen by pairs to represent white-collar, technical-skilled, and blue-collar oriented occupations. Data on enrollment patterns were analyzed according to percentage in frequency distributions. Differences in mean grade point averages for completers and non-completers of English and mathematics were analyzed using the t-test. Significant variance among the groups representing types of occupations was analyzed using the chi-square test for independence. The Pearson Product Moment test was used to investigate correlations …

Because it is representative of other Southern Baptist seminaries and distinguished by a vigorous graduate program, Southwestern Baptist Theological Seminary (SWBTS) was chosen as the institution from which the population was taken. The study, conducted in 1984, collected data about women graduates of SWBTS for the years 1975, 1978, and 1981, with the following purposes: (1) to develop a profile of women who choose seminary education as an avenue of career preparation; (2) to determine the degree of influence of significant others --individuals in the family, school, peer group, and the church -- on women pursuing graduate education in order to prepare for ministry vocations. Among the findings of the study are these observations: 1. Despite a consistently supportive role from church pastors about respondents' career choices before, during, and after seminary, few seminary graduates encountered clergywomen as role models, or received material support from their home churches, and many encountered gender bias and discrimination as they sought ministry-related careers throughout their educational careers and afterwards. 2. The most desired career choices expressed by respondents include missionary, age group minister, counselor, minister of education, and college or seminary teacher. 3. The least desired career choices of respondents include minister of …

The purpose of this study was to propose an exploratory causal model that examines the influence of several antecedent variables on burnout. The antecedent variables included age, marital status, education, tenure, Type A personality, Jungian types, death anxiety, leadership style, job satisfaction, stress, coping efficacy, and marital satisfaction. The validity of the causal model was tested by using path analysis. Subjects were 100 male firefighters who completed self-report measures of the predictor variables. Instruments included the Jenkins Activity Survey, Myers- Briggs Type Indicator, Collett-Lester Attitudes Toward Death Scale, Leader Behavior Description Questionnaire, Job Descriptive Index, Perceived Job Stress, The Coping Inventory, Dyadic Adjustment Scale, and the Maslach Burnout Inventory. Perceived work stress made the only direct contribution to the variance in burnout. Direct paths were found to stress from job satisfaction, Type A personality, and single marital status. Job satisfaction was directly related to leadership (consideration) and the Jungian Introversion, Feeling, and Perceiving preferences. Direct paths were found to marital satisfaction from death anxiety, leadership (consideration), and leadership (structure). Leadership (consideration) was directly related to structure. From the above results, it can be concluded that perception of stress is an important factor in predicting burnout. Other factors are important contributors …

Academic librarians have for a number of decades been interested in understanding more about how and why students use libraries. This study contributes to that area of library administration by focusing on nine factors thought to be associated with student use of academic libraries.

The purposes of the study were: to determine the relationship between class size and academic achievement among university students in first-semester calculus classes, and to compare opinions about the instructor, course, and classroom learning environment of university students in small first-semester calculus classes with those in large classes. The sample consisted of 225 university students distributed among two large and two small sections of first-semester calculus classes taught at the University of Texas at Arlington during the fall of 1987. Each of two tenured faculty members taught a large and small section of approximately 85 and 27 students, respectively. During the first week of the semester, scores from the Calculus Readiness Test (CR) were obtained from the sample and used as the covariate in each analysis of covariance of four periodic tests, a comprehensive final examination, and final grade average. The CR scores were also used in a logistic regression analysis of attrition rates between each pair of large and small sections of first-semester calculus. Three semantic differentials were used to test the hypotheses relating to student opinion of the instructor, course, and classroom learning environment. It was found that for both pairs of large and small first-semester calculus classes …

This study examined the factors related to travel mode choices in the Dallas-Fort Worth Metropolitan Area. Changes in population, life style and economy of the Dallas-Fort Worth region over the last few decades demand a careful re-examination of travel demand tools and methods. The purpose of the study was to provide an understanding of transportation modal choice in the region. Those demographic variables best predicting the choices were identified. The Home Interview Survey, a set of disaggregate data from the 19 84 North Central Texas Council of Governments (NCTCOG) Regional Travel Survey, was analyzed using logistic regression. The major findings of the research indicate that about 97 percent of the travelers in the study area used private cars and 3 percent used public transit. Household income and cars-vans were significant explanatory variables. The impact of household income and number of car-vans available upon an individual's decision for travel mode choice were very important. The number of car-vans available in the household, and age of respondents were significant predictors in travel mode. Household members with incomes of $30,000 to $39,000 and those with incomes of at least $50,000 tended to use more private cars than did other income groups. Also, household …

A Faculty Orientation and Design for Writing Across the Curriculum is a case study of the work done to introduce the concept of writing across the curriculum at an urban community college. Emphasizing the related processes of learning, thinking, and writing, the researcher describes private interviews and analyzes transcriptions of small group meetings designed to discuss ways to encourage increased quantity and improved quality of writing in vocational and university-parallel courses on the campus. The focus of the study is the transcription of the faculty meetings where teachers reveal their methodologies and educational philosophies as they discuss ways to provide increased writing opportunities to large classes of open-door students. The culmination of the orientation project is a faculty booklet of ways to increase writing. The researcher concludes that although a writing "program" is not in place as a result of the year's work, essential groundwork for such a program is laid.

The problem with which this investigation is concerned is that students of unequal writing ability are frequently placed in the same beginning media writing classes in college journalism. It is difficult for a teacher to be effective when the ability of the students ranges from those who cannot write clear complete sentences to others whose work already appears in newspapers and magazines. The purpose of this study is to determine whether students who are ability grouped into slow—average and advanced groups do the same, better, or worse than heterogeneously grouped students. In the spring semester of 1987, students in Journalism 1345, Media Writing laboratory, at the University of Texas at Arlington, were given a pretest to determine how well they wrote a simple news story and a simple feature story. On the basis of that test, which was graded by three raters, the students were placed in two separate ability groups in three classes. The fourth class contained students with heterogeneous abilities who were not placed in groups. At the end of the semester a posttest was given in news and feature writing. A two-way analysis of variance was used to analyze the posttest scores of sixty-seven students. There was …

The problem of assessment and diagnosis of depression in the elderly begins with the definition of depression being indefinite. In this study, the theory of learned helplessness was chosen because of its value in organizing research within a learning theory framework. The Beck Depression Inventory, measures of fluid and crystallized intellectual ability, locus of control, and attribution of success and failure were chosen as variables for an exploratory factor analysis. The purpose of selecting these variables was to assess the cognitive, motivational, and affective components of learned helplessness as they affected the responses of elderly subjects to depression items. Self report measures of income, education, and health, were included to assess the relationship of these variables to depression. A somatic factor was predicted to correlate with an affective factor of depression.

Few areas of research in the finance literature have received greater attention than the efficient market hypothesis. Much of the research has been directed toward the securities market while very little research has been done in the real estate markets. The existing research on real estate market efficiency has been either descriptive or illustrative with very little empirical testing being performed. The major reason for the lack of empirical testing has been the inability to develop an adequate data base. The results of the empirical work that has been done do not support the widely held belief that real estate markets are inefficient. This study, using the autoregressive-integrative-moving average (ARIMA) time series analysis technique, tests the weak-form efficiency of the Dallas-Fort Worth office properties real estate market. According to the weak-form efficient market hypothesis, all price information should be capitalized into current real estate prices and not provide the basis for earning abnormal returns in trading. Price data formed from office building sales dating from January, 1979 to January, 1985 are used to test the market. The data was gathered from the files of several professional appraisal firms located in the Dallas-Fort Worth area. The transaction information includes (1) transaction …

The purpose of this study was to validate a stress inventory which would differentiate between a normative group and a patient population suffering from environmental illness. The hypotheses of this study were: (1) the Total Stress Load Inventory would be predictive in discriminating between clinical ecology patients and a normative group; (2) each section or subscale of the Total Stress Load Inventory would be predictive of psychological, cognitive, nutritional, and/or medical factors.

The purpose of this study was four-fold: the identification of behaviors perceived as academically honest by faculty and six levels of nursing students, to determine differences between faculty and students, to determine differences between graduate and undergraduate students, and to determine differences in consequences proposed by faculty and students.

This study describes perceptions of the president's role in organizational change in each of ten colleges in two metropolitan community college districts. The purposes included (1) tracing major administrative reorganizations from the fall of 1975 to the spring of 1985, (2) ascertaining perceptions of the reasons for those reorganizations, and (3) obtaining perceptions of the role of the president in those reorganizations.

The present study evaluated offender characteristics associated with completion of halfway house placement by the inclusion of additional offender characteristics for analysis in addition to those studied in previous research, the analysis of a large number of representative cases, and the use of statistics allowing clear conclusions upon which to base decision making. Data analysis was done in three steps. The first Step was to identify offender characteristics which were associated with completion in halfway house placement. The second step was to see how accurate the offender characteristics identified were in predicting completion of an offender's halfway house stay. The third step was to identify any possible factors which underlie the offender characteristics identified. Discriminant analyses identified ten offender characteristics which were associated with completion of halfway house placement for 521 male offenders and four offender characteristics which were associated with halfway house completion for the group of 33 female offenders studied. These offender characteristics resulted in 75.38 percent correctly classified cases for the male offender group and 96.9 7 percent correctly classified cases for the group of female offenders. Factor analyses resulted in the identification of four factors for the group of male offenders and two factors for the …

Wretlind, Heden, and Wadstrom found ammonium sulfate to be inhibitory for the formation of extracellular protease in Aeromonas hydrophila grown in Brain Heart Infusion medium. They demonstrated by manipulating the iron and zinc content within their medium that it is possible to differentially affect the accumulation of hemolysin and protease by A. hydrophila grown in batch culture. Further manipulation of the composition of this medium was done in the present study to determine the effect of other components on the production of protease. The purpose of this study was to determine the factors affecting the level of A. hydrophila protease produced in a chemically defined medium.

The purpose of this study was to investigate job satisfaction of full-time faculty members at a large multi-purpose university in relation to gender, rank, and types of activity. The population consisted of 664 full-time faculty members at North Texas State University during the spring semester, 1984. The questionnaire consisted of two parts, the Job Descriptive Index and The Faculty Data Sheet. The theoretical basis of the study was Herzberg's theory of Motivation-Hygiene.

Between June and August, 1983, a postal survey was conducted to gather information on industrial mental health programs in mid-sized corporations in the Dallas-Fort Worth Metroplex. The sample included all companies listed in Standard and Poor's Register of Corporations, Directors, and Executives (1982) with an employee population of 500 to 2,000. Approximately 27% of the responding corporations indicated that they had formal existing industrial mental health programs. The responses indicated that the majority of formal industrial mental health programs were located in banking, insurance, high technology, media, and professional enterprises. The relationship between the size of companies and the provision of services was curvilinear.

The problem of this investigation was to clarify the responsibilities of the employer participating in the VOE program. Three major purposes were stated: (1) to determine the role expectations of employers of VOE students as perceived by employers participating in the program; (2) to determine the role expectations of employers as perceived by the VOE teacher-coordinators; and, (3) to determine if any significant differences existed between the employer perceptions and those of the teacher-coordinators. To obtain information, questionnaires were sent to a random sample of fifty employers participating in the VOE program during the 1983-84 school year. An identical survey instrument was administered to thirty VOE teacher-coordinators in Fort Worth. A Chi-square test of independence was applied to the data to test the hypotheses, with the .05 level used as the point of rejection. Of the seventeen surveyed possible role functions addressed, a majority of the employers responded positively to sixteen, were undecided about one, and responded negatively to none. A majority of the teacher-coordinators responded positively to eleven, were undecided about six, and responded negatively to none. One significant difference existed between the employer perceptions and those of the teacher-coordinators concerning one training responsibility which resulted in the rejection …

The purpose of this study was to examine the effects of different surfaces on lower limb motion and encountered pressures at two locations on the plantar surface of the right foot. Nine females performed five trials for each of four surface conditions. The results provided no evidence for surface-related changes in experienced foot contact pressures. Both asphalt and grass surfaces resulted in the shortest relative time of forefoot immobility. No surface related differences were found for the range of pronation.

A comparison of contingent word and phonics drilling exercises on oral reading errors was made and the effects of a work skipping contingency on reading comprehension were examined. Five learning disabled elementary school children served as subjects. Reading comprehension increased from 30 to 50% over baseline, while subjects progressed an average of two years through a reading series. Subjects responded differentially to the two drills on oral reading errors, but the combined effects of the drills produced a 50% average reduction in errors. Pre- and post-tests of reading achievement showed increases in reading grade levels ranging from .8 to 1.5 years during the 10 week, 30 session study. Results supported the efficacy of a behavioral approach to reading remediation.

This study investigated factors influencing the selection of apparel worn to work by women who attended fashion and wardrobe seminars in the Dallas-Fort Worth metroplex. Clothing selection factors were analyzed by computer according to age, marital status, work status and education. The majority most frequently wore suits and separates to work. Single participants preferred separates. Most wore sizes considered average. Respondents most frequently purchased apparel from department stores. Brand name and designer apparel were occasionally purchased. Though interested, few respondents had taken advantage of personal consultant services. It was recommended that retailers make wardrobe services known to the public.