The purpose of the study was concerned with specific elements of the portion of the female voice commonly referred to as whistle or flute register. Three elements of vocal production were chosen for which past research has demonstrated relationships to source function. These elements included spectral characteristics, airflow rates, and perceptual identification. The research compared what the singer-subjects perceived as being whistle register phonations with that which they perceived as being head register phonations. A comparative technique was utilized where pitch, intensity and phonemic category were held relatively constant, register, therefore, being the only variable. Spectral characteristics and airflow rates of the two subject-determined registers were compared. In addition, an attempt was made to determine if the whistle register could be perceptually differentiated on the basis of voice quality,

Psychological research suggests that Ritalin reduces the rate of maladaptive behaviors in hyperactive children but does not improve their academic performance. Teachers, however, often assert that writing skills and other graphic work are improved by Ritalin. Twenty elementary school children who had been diagnosed as hyperactive and who were taking Ritalin were tested using WISC-R coding, WISC-R block design, and Bender Gestalt. Ten of the subjects were assigned to a group which was first tested when the children were off Ritalin and subsequently tested when they were on Ritalin. The sequence was reversed for the remaining ten. This procedure was designed to counterbalance the effect of practice. Direct difference t-tests indicated that there were no differences between groups regarding any of the three dependent measures. Thus, results indicate that the popular conceptions among educators regarding the efficacy of Ritalin for improving visual-motor efficiency is open to serious question.

The problem addressed in this study is the need for efficient and economic methods to train naive college students to operate microcomputers as a necessary step in their acquisition of computer proficiency. Two methods of training were compared. These were training by live demonstration and training by videotape. These methods were considered economically viable because each could be presented in a classroom and neither required a one-to-one student-to-computer or student-to-tutor ratio. Four sections of an introductory computer science class were used in the study. Two classes were presented each treatment. The effectiveness of the presentations was measured by means of a written quiz administered immediately after the presentation and by the number of microcomputer system operation tasks successfully completed during an individual laboratory session. The computer anxiety level of each participant was measured prior to the presentation to determine if anxiety was a factor in finding the best training method. When scores of naive users who saw the videotape were compared with the scores of naive users who saw the live demonstration, no significant differences were found. However, when novice users (those who had some previous experience with operating or programming a microcomputer) were included, the group that saw the …

The problem of this study was the roles of the general assembly agencies of the Presbyterian Church in the U.S.A., the Presbyterian Church in the U.S., and the United Presbyterian Church of North America in the development of Barber- Scotia College, Knoxville College, Johnson C. Smith University, Stillman College, and Mary Holmes College. The historical records of these three churches for the period from 1866 to 1983 were examined to analyze the factors surrounding the establishment of the five colleges, the differences and similarities in the administrative practices of the general assembly agencies charged with operating the colleges, the relationships of the colleges to the churches in the transition from dependent mission schools to independent colleges, and to identify way in which the Presbyterian Church (U.S.A.) may improve its support of Black higher education. The Presbyterian Churches established the mission schools to meet the religious, educational, and economical needs of the emancipated Black slaves. Though the three 2 churches had differences over the issues of slavery and doctrine, the administrative systems developed for the operations of the schools were very similar. All treated the missions schools as remedial temporary measures necessitated by the refusal of Southern and border states to …

This study examines the main research hypothesis that there is significant interaction between the effects of computer use/non-use and level of computer training among community college educators in the state of Texas regarding attitudes toward the implementation of administrative and instructional computing. A statewide survey was conducted with deans of instruction and full-time faculty members who represented the three academic transfer departments of natural/physical sciences, social science, and humanities/fine arts. Fifty-five deans of instruction and three hundred fifty-six faculty members participated in the study. A factor analysis of data from the questionnaires revealed four factors which were identified and labeled: Factor One: Computer Applications: Advantages and Disadvantages; Factor Two: Administrative Computer Applications: Advantages and Disadvantages; Factor Three: Apprehensions About Educational Computing; Factor Four: Situational Factors Associated With Computer Applications in Education. A 4x3x2 (professional position x level of computer training x level of computer experience) multivariate analysis of variance of both main and interaction effects was then performed within and across these factors.

The purpose of the study was to investigate conflicts in the perceptions of band directors, band parents, band students, and selected school personnel regarding the role and scope of their respective band programs. The problems were to examine the relationships among these four groups in terms of selective perception, perceptual constancy, and polarization. Questionnaires were developed in order to survey the senior public high schools in Cedar Rapids, Iowa. In addition to demographic data, the questionnaires included perceptions about public performances, marching, concert, and jazz bands; contests and festivals; and other band related activities which might be desirable in a band program. The questionnaires concluded with opportunities for open-ended comments and suggestions about the survey instrument and the band program. Statistical computations included one-way analysis of variance, chi-square test, frequency counts, and cross-tabulations. Qualitative analyses and reports of interviews helped to clarify and interpret all statistical findings.

This study is an investigation of the relationship between selected structural characteristics of the community and innovation among cities. Four major Structural characteristics were chosen to serve as independent variables. These independent variables were community differentiation, community poverty, community maturity and type of local government. Innovation, as measured by applicant status to the federal Urban Development Action Grant Program, served as the dependent variable. Analysis of the data indicated support for several of the postulated hypotheses. The structural characteristic community differentiation was found to be significantly related to applicant status. For the structural characteristic community poverty no significant relationship to applicant status was observed. Community maturity revealed a significant relationship to applicant status. Finally, for the structural characteristic local form of government a significant relationship with applicant status was observed. Based on the interpretation of the findings, an original typology of innovation was developed. This typology included planned revitalizing innovation, social enhancing innovation, entrepreneurial stimulating innovation, and needs inducing innovation.

Using a case study approach, this investigation focused on the deliberations and decision-making processes involved in the development of a physical science curriculum to be delivered by interactive videodiscs. The mediating factors that influenced the developmental processes included the participants and their perceptions, their decisions and factors influencing their decisions. The Curriculum and Instruction Advisory Committee of the Texas Learning Technology Group was selected as the subject of this study which used qualitative data collection methods. Data collection included participant observation of curriculum meetings followed by structured interviews of the participants. Document analyses were triangulated with the observations and interviews to ascertain influences on decision-making processes. Developmental processes indicated the emergence of staff and committee procedures. Procedures were influenced by school district and personal philosophies, teacher and student needs, and constraining factors such as state Developmental processes indicated the emergence of staff and committee procedures. Procedures were influenced by school district and personal philosophies, teacher and student needs, and constraining factors such as state mandates. Other influencing factors included research, tradition, and politics. Core curriculum was to be delivered by interactive videodiscs and include remediation and enrichment loops along with laboratory simulations. Participants stressed that students perform traditional laboratory experiments …

This study evaluated the role of asymmetric processing of information in depression. Depression has been hypothesized to involve a deficit in the global processing of information (Tucker, 1982). This type of global processing has been manipulated through the use of hypnosis by Crawford and Allen (1983). In the current study, a 3 x 2 ANCOVA design allowed the comparison of three groups of subjects on their performance on a perceptual task measuring global perception. The task chosen was designed by Navon (1977) and consisted of designs which differed on global or local features. The groups were screened with the Beck Depression Inventory, the Harvard Group Scale of Hypnotic Susceptibility, and the Edinburgh Handedness Inventory, yielding 46 subjects divided into three groups of right-handed males and females. The experimental group consisted of high susceptible depressives from the community. The controls were one group of high susceptible normals and one of low susceptible depressives. All groups performed the Navon task under both waking and hypnosis conditions. Analysis of the results revealed a main effect for group (F(2, 86) = 9.60, p < .01) on the global scores. In addition, high social desirability scores predicted slower presentation times. However, hypnosis was not effective …

The roles of Ca2 + and cAMP in olfactory transduction were explored using agents which affect calcium channels and second messenger systems. These agents were applied at certain calculated final concentrations onto olfactory epithelia of urethane-anesthetized frogs (Sana PiPlens) by two-sec aerosol spray. During extracellular recording, saturated vapors of isoamyl acetate were delivered every 100 sec in 0.3 sec pulses to produce an electroolfactogram (EOG). Inorganic cations that block inward calcium currents inhibit EOG responses with the following rank order: (La3+) > (Zn2+, Cd2+) > (Al3+, Ca2+, Sr2+) > (Co2+). Application of 7.5 mM La3+ eradicates £0G's, while Ba2+ (which can carry more current that Ca2+) initially produces significant enhancement (F=43.04, p<0.001, df=19). Magnesium ion has no effect on EOG's at 7.5 mM, while 1.5 X 10"4M Ca2+ is significantly inhibitory (F=5.74; p=0.0355; df=12). Control aerosol sprays of distilled water depress EOG's by an average of 5%. The organic calcium channel antagonists diltiazem and verapamil inhibit EOG's by 17% and 36X, respectively, at a concentration of 1.5 X 10~*M. Verapamil produces significant inhibition (F=17.17; p=0.002; df=ll) at 1.5 X 10" 5 M, while the 1,4-dihydropyridine calcium channel antagonists, nicardipine and nifedipine, do not inhibit beyond 1% DMSO controls. Several calmodulin …

Respiratory and metabolic patterns in response to variations in exercise workload (WL) and pedal frequency (RPM) were examined in 10 healthy males. Each subject performed WLs of low (L), moderate (M) and high (H) intensity, equivalent to 25%, 50% and 75% V02 m a x at 7 pedal frequencies (40, 50, 60, 70, 80, 90 and 100 RPM). ANOVA ( 3 X 7 design) indicated that WL and RPM had independent and significant effects on all respiratory and metabolic measures; i.e., the greater the WL and RPM, the higher the HR, V02, VC02, Ve, Fb, Vt, Vt/Ti, Vt/Te and Ti/TtQt and the lower the Ti and Te. However, analysis of the interaction effect revealed different response patterns for Fb, Vt, Ti, Vt/Ti, Vt/Te and Ve among the WLs. During L-WL, increases in RPM produced increases in Ve which were due to progressive increases in both Fb and Vt. However, during M-WL and H-WL, increases in RPM produced increases in Ve which were accomplished by a constant Vt and a progressive increase in Fb. My findings suggest that during low WLs, the signal for Vt is dependent on rate of contraction, while during M-WL and H-WL, the signal for Vt appears …

This study addressed two issues. First, it examined the ability of two models, developed by Cox, Ingersoll and Ross (CIR), to explain the differences between futures and implicit forward prices in the thirteen-week T-bill market. The models imply that if future interest rates are stochastic, futures and forward prices differ; the structural difference is due to the daily settlement process required in futures trading. Second, the study determined the efficiency of the thirteen-week T-bill futures market using volatility and regression tests. Volatility tests use variance bounds to examine whether futures prices are excessively volatile for the market to be efficient. Regression tests investigate whether futures prices are unbiased predictors of future spot prices. The study was limited to analysis of the first three futures contracts, using weekly price data as reported in the Wall Street Journal from March, 1976 to December, 1984. Testing of the first CIR model involved determination of whether changes in futures-forward price differences are related to changes in local covariances between T-bill futures and bond prices. The same procedure applied in testing the second model with respect to changes in futures-forward price differences, local covariances between T-bill spot and bond prices, and local variances of bond …

While musical sources and documents from throughout the Middle Ages reveal that mode was an enduring and consciously derived trait of monophonic chant, modality in later polyphony shares neither the historical span nor the theoretical clarity of its monophonic counterpart. Modern theorists are left with little more than circumstantial evidence of the early development of modality in polyphony. This study attempts to shed light on the problem by detailed analysis of a select body of paraphrase masses from the early sixteenth century. First, it correlates the correspondence between the paraphrased voice and the original chant, establishing points of observation that become the basis of melodic analysis. Then, these points are correlated with known rules of counterpoint. Exceptions are identified and examined for their potential to place emphasis on individual mode-defining pitches. A set of tools is derived for quantifying the relative strength of cadential actions. Levels of cadence are defined, ranging from full, structural cadences to surfacelevel accentuations of individual pitches by sixth-to-octave dyadic motions. These cadence levels are traced through the Missae de beata virqine repertoire from c. 1500-1520, a repertoire that includes masses of Josquin, Brumel, La Rue, Isaac, and Rener. While the Credos, based on two chant …

The effects of a computer program (Health Imagery Technology Systems, HITS) designed to promote attitude and cognitive changes through elicitation of evoked response potentials were evaluated with chronic pain patients. A treatment and control group were used for comparison (52 patients, 22 females, 32 males, mean ages 47). Wechsler Adult Intelligence Scale-Revised subtests, a Semantic Differential scale, the Health Attribution Test, an imagery protocol, the McCoy-Lawlis Pain Drawing, and the Zung Depression scale were used at admission and discharge to measure change. A pre- post-mood thermometer was used with the treatment group. The hypotheses that the treatment group would show significant changes on these measures were tested with a two group repeated measures analysis of variance design. No significant changes were noted for either group on the intellectual measures, on health attitudes, or reports of pain. The similarities subscale showed significant within group variance (F = 5.46, p < .023). One bipolar adjective pair indicated significant differences (F = 4.79, p < .035), possibly a result of chance. One of seven imagery measures suggested a significant improvement in strength of imagery for the treatment group (F = 18.2, p < .00008). Both groups showed significantly improved imagery of body defenses …

This investigation represents an initial attempt toward the construction of a general life cycle theory of parent-child relations. Emphasis was placed on the parent-adult child relationship with the onset of a filial crisis, e.g., due to illness. After the theory was described, two of the five propositions comprising this orientation (i.e., propositions four and five) were analyzed through a series of twenty-five hypotheses. The objectives of these hypotheses were (a) to analyze the relationship between the length of time involved in various patterns of filial responsibility and the likelihood that these patterns will become institutionalized as obligatory roles and (b) to determine how factors associated with these emergnt role obligations contribute to the cost of caregiving. A probability sample of 180 caregivers was obtained from within the Dallas/Ft. Worth area. Multiple and partial correlation analyses and the use of Student's t revealed that the length of time involved as a caregiver was significantly related to the number of informal caregiving roles performed by adult children. In addition, results indicated that the length of involvement in each caregiving role examined (i.e., household care, transportation service, personal care, medical attention, meal preparation, financial management and mobility assistance) was significantly related to (a) …

The purpose of this study was to compare the legal costs of Texas public school districts during the school years 1980-81, 1981-82, and 1982-83 with the preventive law practices utilized by those districts. A survey was made of Texas superintendents' knowledge of school law. The data were contrasted with legal costs and the preventive law practices of the district. Two survey instruments were developed, and the case study approach was utilized. A survey was sent to the 1,101 Texas public school superintendents. The twenty-five item instrument was designed to solicit information regarding the amount of money spent by districts and the types of preventive law practices that school districts use to reduce legal costs. A legal awareness questionnaire was developed and administered to 72 of the 542 superintendents who responded to the first survey instrument. Three school districts were selected to be case study sites. The data from the instruments were analyzed to determine if a relationship existed between a district's legal costs and its preventive law practices, a district's legal costs and the superintendent's knowledge of school law, and a superintendent's knowledge of school law and the district's preventive law practices. The major conclusions of the study were as …