Sorghum plants excrete phenolic acids which reduce subsequent crop yields. These acids accumulate in field soil by combining with soil and clay particles to form stable complexes which remain until degraded by bacterial metabolism. The amount of phenolic acids in soil samples were obtained by gas chromatography measurements, while Azotobacter populations were obtained by plate counts in 40 sorghum field samples from Denton County, Texas. One can conclude that increasing the Azotobacter population in the soil increased the degradation rate of phenolic acids proportionally. It is proposed that seed inoculation will introduce selected strains of Azotobacter into the soil. The presence of Azotobacter should increase crop size in subsequent plantings.

The purposes of this study were to identify public school districts that currently offer, or are planning to offer, transitional first-grade programs, to describe existing transitional programs, to describe the genesis of transitional first-grade classes in the North Texas area, and to assist in the establishment of a networking system for schools in the North Central Texas area that currently have, or are planning to have, transitional first-grade classes. The 158 school districts in Regions 10 and 11 were surveyed. The findings of the study indicate that about one-third of the districts offered transitional first-grade programs during the 1988-89 school year, and two-thirds of the districts saw a need for transitional first-grade classes. These transitional programs were implemented to meet the needs of children who had completed kindergarten but were not ready for regular first grade. Transitional first-grade programs focus primarily on language arts and math skills for kindergarten and early first grade. While curriculum materials vary from district to district, language arts is likely to be based on a whole-language approach, and math is likely to focus on manipulatives.. Kindergarten teacher observation is used in the screening procedures in the majority of the districts. A number of instruments are …

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 …

A group of 101 older adults (sixty-five years of age and over) who lived independently in three retirement apartment residences in Denton, Texas, were asked about their patterns of reading, television viewing, and radio listening habits for two periods in their lives: (1) at age forty to fifty-five and (2) at the present. Respondents were asked about their use of external information sources (public library, grocery store, newsstand, etc.) and their use of proximate information sources (radio, friends/relatives, television, etc.) They were also asked about access to transportation, income satisfaction, status of general health, vision, hearing, physical mobility and reasons for utilizing various information sources. Four hypotheses relating changes in health, environment, economic status, and education to reasons for reading and use of information sources were tested through the use of t-tests, regression analysis and analysis of variance. Within this group of older adults, use of external information sources decreased from the past to the present. There was, however, no change in the use of information sources located in or near the residence as difficulties in these areas increased. A relationship was found between educational level and reading for pleasure earlier in life. Also, those with higher educational levels reported …

The primary purpose of this study was to compare regular classroom instruction which used Guided Mental Imagery (GMI) to a non-GMI teaching method. This comparison was expected to yield data which would provide insights relating to the potential of GMI as a useful and effective instructional strategy. Quasi-experimental research methods were followed. The experimental design was a modified "post-test only control group design." Two-hundred-four students in naturally occurring in tact classes formed the experimental and control groups. All groups received instruction in identical science/health content. Two parallel post-tests were administered to all students. Post-test "A" was given immediately after instruction to measure learning acquisition. Post-test "B" was given four weeks later to measure retention of learning. Means for test scores were grouped according to treatment and sub-grouped by the variables: IQ, handedness, identified learning disability, and intellectual giftedness. T_ tests for differences between independent means were conducted. Students' acquisition of basic academic content, when instructed with GMI methodology, was found to differ significantly from students' acquisition of the same content with non-GMI instruction. No statistically significant differences based on instructional methodology were found for content retention. The investigator concluded that GMI instruction may increase learning. Although measures of retention did …

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 investigates the inter-rater reliability of appraisers who award exceptional quality points on the Texas Teacher Appraisal Instrument. Inter-rater reliability was measured when appraisers scored exceptional quality points after viewing a videotaped lesson. Comparisons were made between appraisers when grouped according to elementary or secondary certification, sex, years of administrative experience, and type of training. A total of 707 subjects from 56 school districts participated in the study. Five research hypotheses were formulated with the .05 level of significance for acceptance. All hypotheses were tested by correlation of coefficients, multiple response procedures, frequencies, and percentages. The data measuring inter-rater reliability of the appraisers in training imply that there is very little reliability in the awarding of exceptional quality points on the Texas Teacher Appraisal Instrument. The findings of this study are that certification, sex, administrative experience, and type of training made no significant differences when scoring the instrument. Therefore, it is concluded that the scoring of exceptional quality points is a subjective, professional judgment made by each appraiser when observing a teacher. Since no significant reliability was found, the scoring of exceptional quality points cannot be supported as a reliable means of determining the quality of teaching in Texas …

The purpose of the study was to compare the academic stress of freshmen in a community college with that of freshmen in a university. An additional purpose was to determine if gender, ethnicity, or semester course load was related to perceived academic stress. The sample consisted of a total of 303 university and community college freshmen from English and Psychology classes at the University of North Texas and Richland Community College during the spring semester, 1989. The instrument that was administered to these volunteer students was the Academic Stress Test, a 35-item checklist of possible academic stressors. The students were asked to check the items which were perceived by them to be stressful and had occurred during the current semester. The T-statistic was used to analyze the total mean stress score for each variable being considered. Multiple regression was used to determine if there was any possibility that the variables might have a predictive effect for academic stress. It was found that for these freshmen students there was a significant difference between the perceived academic stress of community college freshmen and university freshmen. The mean academic stress score for university freshmen was higher than the mean for community college freshmen. …

This study modified the Ramanujam and Venkatraman (1987) questionnaire that was used to develop their model of planning system dimensions and planning effectiveness, and tested the model on a sample of private social service agencies. The criterion measures were level of planning sophistication, agency size, perceived environmental uncertainty, and relative competitive position. The sample was randomly drawn from private social service agencies which were members of the Community Council of Greater Dallas. Telephone interviews with fifty executive directors were conducted by a trained, impartial interviewer. Stepwise discriminant analysis was used to predict group membership between informal and formal planners. Of the nine dimensions in the model, three dimensions correctly classified 84 percent of the sample. The three dimensions were fulfillment of planning objectives, use of decision making techniques, and lack of resistance to planning. The level of perceived environmental uncertainty was another criterion set. Directors who perceived high uncertainty paid more attention to the external environment, used more decision making techniques, and relied on functional specialists when planning. Large and small agencies were classified by their annual budgets. Stepwise discriminant analysis using the planning system dimensions failed to reject the null hypothesis. Agencies reporting strong relative competitive positions placed greater …

The purpose of this study was to investigate selected landmark events in the historical development of the Texas Music Educators Association, 1938-1980, and the decisions which influenced their outcomes. A polling of twenty former presidents of TMEA selected the following landmark events that helped to shape the history of TMEA: (1) the change from a band organization to a music educators organization in 1938, (2) the University Interscholastic League takeover of contests in 1947, and (3) TMEA's separation from the Music Educators National Conference in 1976. In addition to developing a historical chronology from documentary sources, in-depth interviews were conducted with actual participants in these landmark events. The interviews utilized comparable questions, in order to identify decision-making patterns, while also capturing the atmosphere and visceral context of TMEA history. Literature from the social science disciplines on organizational decision—making was explored for help in understanding what happened, how, and why. In all three events the final decision was strongly influenced by factors external to the TMEA. The strong power position held by school administrators was evident in both the first and second events, while reinforcement from actively lobbying choral directors was also a factor in the first event only. The strong …

This study examined different funding methods for financing public education in order to solve the problems associated with large numbers of school districts and great disparities in property wealth without abandonment of property tax as the major revenue source. Using enrollment and State Property Tax Board data for the 1,061 school districts in Texas in 1986-87, four alternative funding plans were studied to compare the equity and fiscal impact of each on public school finance in Texas. The state and local shares of the total cost of education were computed using a combination of three per-pupil expenditure levels and four funding formulas. The per-pupil expenditure levels used were $3,850, $4,200, and $4,580. The formulas used were representative of a full state funding plan, a percentage equalization plan, a power equalization plan, and a foundation school program plan. Since each of the four plans used significantly higher per-pupil expenditure values, all required a greater monetary investment on the part of the state. However, all plans were found to be equalizing in nature if set per-pupil expenditure values were maintained and no local enrichment was permitted. In addition, each of the four plans, as studied, met the fiscal neutrality standard of the …

Sediments in the Trinity River were chemically, physically and biologically characterized and assessed for toxicity. Laboratory bioassays were conducted to identify sediments which induced toxic responses in test organisms and to document these responses through time. Metal and organic contaminant concentrations in bottom sediments were measured. Relationships between these concentrations and biological responses observed in laboratory bioassays were determined. Toxicity identification / reduction methods were used to characterize sediment toxicants. Sediment oxygen demand was also measured in resuspended and undisturbed bottom sediments through time. The Background Sediment Chemistry Approach and the Sediment Bioassay Approach were used to assess sediment quality. Sediment toxicity was observed in whole sediment bioassays using Chironomus tentans as the test species. A relationship between sediment contaminant concentration and toxicity was observed in approximately sixty percent of the sediments. Oxygen demand of resuspended sediments was elevated in sediments at two locations on the river. Oxygen demand of undisturbed sediments was elevated at one location on the river. Characterization of sediment toxicants was conducted using EDTA, pH, and carbon treatments and manipulations of the sediments. Aeration tests were also used to evaluate the contribution of volatile organic contaminants to observed toxicity.

This descriptive study of 45 multi-generational families contributes empirical knowledge about grandparent-grandchild relationships. A questionnaire was developed and completed by 74 subjects who were part of a randomly selected sample taken from a tax roll of homeowners over age 65 in Denton County, Texas. The responses provide information which expands the existing data base in the area of grandparenting. The study pinpoints areas in the grandparenting literature which need refinement and contributes data to those areas, rather than producing a set of conclusions. Areas as yet undocumented or inadequately documented in the literature are identified as the following: (a) family structural composition; (b) grandparents' personal characteristics; (c) selected aspects of grandparent-grandchild contact; and (d) satisfaction with the grandparent role. Data for these areas should help reveal factors having an impact on grandparent-grandchild relationships. A base for further investigation in these areas is established, and data are also analyzed to determine satisfaction or lack of satisfaction with grandparenting. The seventy-four subjects, from 45 households, included 44 grandmothers and 30 grandfathers. The number of generations per family was used as the base to report the findings. The study substantiates other research on grandparenting, particularly in the area of timing of grand-parenthood. Data …

The major purpose of this descriptive study was to determine common characteristics and influences among women who were serving as public school superintendents of independent districts in Texas during the 1988-89 school year. Commonalities were determined in (1) personal characteristics, (2) personality traits, and (3) perceived barriers to career mobility. A seventy-item survey was developed, validated, and mailed to the thirty-three women superintendents in Texas. Data from the survey were analyzed to determine if commonalities existed among women superintendents. Based on the findings of this study, the following conclusions seem justified: (1) Commonalities in personal characteristics which exist among women superintendents include age, ethnicity, marital status, parenthood, positive attitudes toward being both mothers and superintendents, preference for husbands in the field of education, demonstration of early leadership traits, and self-perceptions of being assertive and risk-taking; (2) Most women superintendents share common views on subjective measures concerning their own personalities, and they rated themselves highest in areas which include self-esteem, general daily activity level, independence, job satisfaction, ability to operate under pressure and practicality; and (3) Most women superintendents perceive similar internal and external barriers to their career mobility; a lack of professional network and employers' negative attitudes toward women are …

The problem. --The problem in this study was to describe the issues arising in employment decisions appealed to the Texas Commissioner of Education. Decisions made in courts are binding on school officials, and they are published in law reporters found in most libraries. The Commissioner's decisions are also binding on school officials, but they are not published or widely reported. Thus, this important body of information may not reach those who are responsible for its application. Methods. --The decisions of the Commissioner were examined to determine the issues and the underlying rationale used by the Commissioner in the process of deciding the appeals. A series of data reductions allowed a determination of patterns found in the outcomes of the decisions which favored the employee and those which favored the school districts. The analysis produced a set of data from which implications for decision making could be drawn.

The problem of this study was to discover the relationship between field-independent and field-dependent cognitive styles and social behaviors during free-play of preschool children in a school setting. This study also compared the field-independent and field-dependent cognitive styles and social behaviors during free-play between age-groups and sex-groups. Thirty-six children from a university child development laboratory were subjects. They were selected from a 3-year-old classroom and a 4-year-old classroom. The research instrument, the Preschool Embedded Figures Test, was utilized to measure field-independent and field-dependent cognitive styles. The children's social behaviors were observed during free-play for four consecutive weeks. The nine categories of social behavior were solitary, parallel, and group play; .unoccupied, onlooker, transitional, and aggressive behaviors; and conversations with teachers and conversations with peers. Correlations between field-independent and field-dependent cognitive styles and social behaviors indicated that field-independence/field-dependence was related to social orientations in preschool children and also related to the choice of play activity. Field-dependent children tended to engage in conversations with teachers more often than field-independent children. Four-year-old children who were field-independent tended to spend more time in solitary play than 4-year-old children who were field-dependent. Four-year-old boys who were field-independent tended to play more often in the manipulative learning …

The problem of this study was to determine if there was a difference in the self-concept of two groups of ninth-grade students when one group received the services of junior and senior students in a Peer Assistance and Leadership class. The results of the Piers-Harris Children's—Self—Concept Scale were used to determine the difference between the mean self-concept scores of the two groups and also to determine if there was a relationship between the criterion variable of the total self-concept score and eight predictor variables as identified by House Bill 1010: Limited English proficiency, age, school attendance, achievement scores two or more years below grade level in reading and mathematics on a norm-referenced test, failure to master any portion of the Texas Educational Assessment of Minimum Skills, failure in two or more subjects, grade retention, and eligibility for free or reduced-price lunch. A total of 105 students, 50 in the experimental group and 55 in the control group, participated. The findings revealed that there was no significant difference in the mean self-concept scores of the two groups. The correlation revealed that there were significant differences between self-concept and the variables of mathematics achievement scores, failing grades, and eligibility for free lunch.

This study investigated the role of selected variables on organizational commitment in selected organizations in a North Texas metropolitan area. The selected (independent) variables were orientation attendance, unit size, educational level, gender, age, and length of service. Organizational commitment score was the dependent variable. The Organizational Commitment Questionnaire and a demographic questionnaire were administered to 1,055 employees. The Organizational Commitment Questionnaire contained fifteen statements which measured employees' feelings about their organization. Multiple regression was used to determine the relationship between organizational commitment and the selected variables at the .001 level of significance. It was determined that gender and length of service showed the strongest significant relationship on organizational commitment. This model shows that the six independent variables account for only 3 percent of the variance in the relationship between organizational commitment and the selected variables. Therefore, approximately 97 percent of the unexplained variance is accountable for the organizational commitment of the employees at the selected organizations used in this study. Studies using the Organizational Commitment Questionnaire to show the relationship between organizational commitment and other antecedents of organizational commitment are recommended. A follow-up study should also be conducted using the Organizational Commitment Questionnaire to show the relationship between organizational commitment …

This study examines the development of Edward Larrabee Barnes's design concepts for the Dallas Museum of Art, from preliminary concepts and program statements by Director Harry Parker and Dallas Museum trustees, through initial planning and architect selection, to site selection, the Program and Space Study, Barnes's early conceptual plans, and his Dallas Arts District master planning. Influences on Barnes's work and his career development leading to the Dallas commission, his most ambitious museum to date, are examined. Discussion and documentation of design development is based on schematic studies, presentation drawings, models, and trustees' minutes. Design changes during construction and all phases of expansion planning are also discussed. The conclusion summarizes historical influences on the design and Barnes's fulfillment of program concepts.

This study examines the development of Edward Larrabee Barnes's design concepts for the Dallas Museum of Art, from preliminary concepts and program statements by Director Harry Parker and Dallas Museum trustees, through initial planning and architect selection, to site selection, the Program and Space Study, Barnes's early conceptual plans, and his Dallas Arts District master planning. Influences on Barnes's work and his career development leading to the Dallas commission, his most ambitious museum to date, are examined. Discussion and documentation of design development is based on schematic studies, presentation drawings, models, and trustees' minutes. Design changes during construction and all phases of expansion planning are also discussed. The conclusion summarizes historical influences on the design and Barnes's fulfillment of program concepts.

The purpose of the study was to determine the direct influences of selected environmental, academic, and background factors as well as academic outcomes and expression of intent to leave on persistence or non-persistence of nontraditional students at a comprehensive community college in the Dallas County Community College District. The study applied a conceptual model of nontraditional undergraduate student attrition. Data for this study were collected during the Fall, 1987 semester from 312 first-year nontraditional students using the two-year institution questionnaires from the National Center for Higher Education Management Systems. In addition, follow-up surveys were administered to the 97 students who did not re—enroll for the Spring, 1988 semester. The data were analyzed using discriminant function, chi square, and product-moment correlation. For these nontraditional students, educational goal commitment, cumulative grade point average (GPA) and expression of intent to leave at the end of the semester had significant direct influence on persistence or non-persistence decisions. In contrast, environmental factors such as finances, employment status, and family responsibilities, and background factors such as high school academic performance, enrollment status and parents' education level did not directly influence dropout decisions. Nontraditional students reported receiving moderate to high levels of encouragement to remain in college …

The purposes of this study were to determine the career paths of women superintendents in the state of Texas and their school board members' perceptions of their levels of success. All women currently serving as superintendents of public schools in Texas, as well as all school board members of districts with women serving as superintendents were surveyed. The findings of this study indicate that the "typical" woman superintendent was hired from inside the district, with a master's degree. She was 48.3 years of age. Her first administrative position was the principalship and she moved directly from the principalship to the superintendency. The typical woman served in one district as superintendent. Her teaching and prior administrative experience was at the elementary level. Women superintendents perceived the position of teacher as the most beneficial experience prior to the superintendency. Women superintendents perceived leadership as the most important area of her professional development. School finance was the area perceived by women superintendents as needing to be more extensive in their professional development. Of the women superintendents who responded to this survey, 68.1 percent reported that they did not perceive discrimination in attaining the superintendency. Of the school board members who responded to this …

The present study attempted to identify demographic and psychological variables predictive of adolescent suicidal ideations and attempts. Data from 90 adolescents, who completed an intake form at a university community mental health clinic or were student volunteers, were utilized. Two judges tabulated information regarding age, gender, number of siblings, ethnicity, parental marital status, drug use, depression, suicidal ideation, and previous suicidal attempts. A multiple regression analysis was performed to identify which variables had predictive significance. Depression was the best predictor of both suicidal ideations and attempts. Ethnicity was also predictive; white adolescents were found to be at higher risk for suicide than individuals from other ethnic groups. It is suggested that additional studies be done exploring other predictors of suicide among adolescents.

The present investigation was designed to examine the effects of the positive manipulation of information on self-efficacy and subsequent performance of 180 female subjects. High, moderate, and low self-efficacy subjects were randomly assigned to a treatment condition in a 3 x 4 x 3 (preexisting self-efficacy x efficacy information source x trials) factorial design. Information from the three efficacy sources of performance accomplishments, verbal persuasion, and vicarious experience was manipulated towards success after subjects completed a muscular leg endurance task. The results supported self-efficacy theory with high self-efficacy subjects extending their legs significantly longer than moderate and low self-efficacy subjects. However, subjects did not differentially [sic] respond to the manipulation of the efficacy information. Results are discussed in terms of efficacy as a mediator of performance on an endurance task as well as the lack of differential changes in efficacy based on the source from which that information is derived.