Theses and Dissertations from UMD
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New submissions to the thesis/dissertation collections are added automatically as they are received from the Graduate School. Currently, the Graduate School deposits all theses and dissertations from a given semester after the official graduation date. This means that there may be up to a 4 month delay in the appearance of a give thesis/dissertation in DRUM
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Item Variations in Vocalizations of Fin Whales, Balaenoptera physalus, in the St. Lawrence River(1980) Edds, Peggy Louise; Buchler, Edward; Animal & Avian Sciences; Digital Repository at the University of Maryland; University of Maryland (College Park, MD)Recordings were made of vocalizations from fin whales, Balaenoptera physalus from a fixed hydrophone in the St. Lawrence River between 28 June and 27 September 1979. Land-based observers monitored activity from a hillside hut while recordings were being made from a shoreline site. Photographs of dorsal fin variations were used to identify distinctive individuals. The 1522 sounds recorded were classified into 11 categories based on frequency and temporal characteristics. The predominant call was a descending sweep of frequencies. Parameters measured for this downsweep exhibited a dichotomy of characteristics which indicates calls with initial frequencies below 40 Hz have less variability than calls with initial frequencies above 40 Hz. In general, solitary animals produced primarily the lower frequency downsweeps. Higher frequency downsweeps were recorded from pairs or trios of fin whales. Solitary individuals did not exhibit unique variations in downsweep parameters. No clusters of values which might indicate uniquely individual ranges were consistently present in multiple animal recordings. The data suggest that the variability of fin whale vocalizations is primarily contextual rather than individual.Item Special Classes and Group Therapy: An Evaluation of Their Effects on Achievement and Behavior in a Public School Setting(1971) Weinstein, Howard G.; Goering, Jacob; Human Development & Quantitative Methodology; Digital Repository at the University of Maryland; University of Maryland (College Park, MD)This investigation was designed to test the relative effectiveness of four educational-treatment methods of providing adequate services for children with special learning problems in elementary school Special Learning Problems classes. The focus was on the relative effectiveness of these methods in bringing about positive achievement and behavior change. The subjects were 50 elementary school pupils enrolled in e ight existing Special Learning Problems (SLP) classes in Fairfax County, Virginia. The Ss represented a wide range of behavioral and/or educational disorders reflected in an equally wide range of inappropriate behavior and/or educational retardation of at least one, and generally two years. Each of the eight pre-established SLP classes was randomly assigned to one of four educational-treatment groups. Two SLP classes were assigned to each treatment group. The experimental methods consisted of special class placement and: (A) "Child Therapy Only" (CTO); (B) "Parent Therapy-Only" (PTO); (C) "Child and Parent Therapy" (CPT). In addition, a "Special Class-Only" (SEO) control group was included. Subjects in the CTO and CPT groups participated in 24, 90-minute group therapy sessions. The parents of the children in the CPT and PTO groups received 24, 90-minute parent group therapy sessions. The SEO (control) group did not receive group therapy nor did their parents. Group therapy sessions were conducted by trained and experienced group therapists from the Mental Health Center. The California Achievement Tests, The Wide Range Achievement Test, the Behavior Rating Scale, and the Human Figure Drawing Test were administered in mid-October, 1969 and repeated in mid-April, 1970. The difference between pre- and post-test scores were computed and the differences between treatment groups' mean gain scores were tested for significance by means of t-ratios. The null hypotheses tested were: Hypothesis 1. There will be no significant differences in mean gain scores on any of the achievement measures or on the behavior ratings between the control group (SEO) and any of the experimental groups (CTO, PTO, CPT). Hypothesis 2. No significant differences in mean gain scores on any of the achievement measures or on the behavior ratings will be found between the three experimental groups (CTO, PTO, CPT). Hypothesis 3. There will b e no significant differences in mean gain scores on any of the achievement measures or on the behavior ratings between those students designated as NEW (1st year SLP) and those FORMER students in SLP classes. The analyses of the results from the achievement and behavior measures provided, with only three exceptions, support for not rejecting the null hypotheses. With regard to Hypotheses 1 and 2, although only two comparisons reached statistical significance (i. e. , the CPT group obtained significantly higher CAT-Reading and WRAT-Arithmetic gains than the SEO group), it was found that the achievement mean gain scores were generally greater for the CPT group than for either the SEO group or for either of the other two experimental groups (CTO and PTO). In contrast, the SEO group obtained a greater behavior scale mean gain than any of the three experimental groups (CTO, PTO, CPT), although this difference did not reach significance. With only one exception (WRAT-Arithmetic), no significant differences were found between the NEW and FORMER groups. Subsequent to the experimental period, the NEW students demonstrated a significantly greater mean gain in Arithmetic than their FORMER group counterparts. Behaviorally, the FORMER group obtained a greater mean behavior rating gain than the NEW group, although not statistically significant. In general, the present findings provided no evidence for differential favorable effects from any of the educational-treatment methods utilized in terms of significantly greater achievement or behavioral gains. However, some noted trends were suggestive of the fact that perhaps each of the four educational-treatment methods is best suited for different situations, goals, and subjects. Further research was recommended.Item The Influence of Behavior Rehearsal Techniques on Children's Communicative Behaviors(1973) Cassidy, Edward W.; Rhoads, David; Counseling, Higher Education & Special Education; Digital Repository at the University of Maryland; University of Maryland (College Park, MD)The purpose of this study was to investigate the influence of behavior rehearsal techniques on the behavior of shy children as determined by a measure of verbal behavior. Answers were sought to the following questions: 1. Does participation in a behavior rehearsal program affect the verbal behavior of shy children? 2. Is there a difference between standard and personal hierarchies used in behavior rehearsal? 3. Is there a difference between group and individual behavior rehearsal approaches? The sample included one hundred seventy-seven elementary school children from nineteen fourth, fifth, and sixth grade classrooms. The subjects were pupils who had a history of low frequency of verbal participation in group and individual settings. Subjects were randomly assigned to one of two principal treatments or a control group. The first treatment was identified as Behavior Rehearsal-Personal. In this treatment subjects developed their own personal anxiety hierarchy. The second principal treatment was identified as Behavior Rehearsal-Standard. In this treatment the subjects were assigned to rehearse items from a hierarchy developed by the experimenter. The two treatments were applied in both one-to-one and group counseling settings. Besides treatment and setting, sex of subject and counselor were used as classification variables and included in a 2^4 factorial analysis of variance design. At the conclusion of a four week treatment period the subjects were observed on the criterion behavior, unsolicited communicative response, during a thirty minute controlled discussion session. Analysis of the data demonstrated that there was no change in verbal behavior as a result of participating in a behavior rehearsal program. It appears that in this study the behavior rehearsal procedures had no differential effect on the verbal behavior of the shy children. No significant difference was found on any of the other factors which· were measured. Neither the treatment setting, nor the sex of the subject, nor the counselor appeared to have a significant effect on the final results of the study. Although research studies indicate that the behavior rehearsal technique should be an effective technique for shaping assertive behaviors, no such evidence was found in this study. Nor was support found for the traditional view that personalized hierarchies are more effective than standard hierarchies. The lack of research on the behavior rehearsal technique suggests that more intensive and systematic research is needed to assess the specific effects behavior rehearsal has on the behavior of shy children.Item The Effectiveness of Differential Social Reinforcement Strategies in Facilitating Achievement Behavior of Lower Socioeconomic Status, Primary Grade Children(1971) Fishman, Harold; Matteson, Richard; Human Development & Quantitative Methodology; Digital Repository at the University of Maryland; University of Maryland (College Park, MD)This study was designed to ascertain whether Positive Social Reinforcement (PSR), Negative Social Reinforcement (NSR) and the condition of no verbal feedback (Control) have a differential motivational effect on the achievement behavior of low socioeconomic status, primary grade Ss. Two related objectives of this research were : (a) to determine whether black and white Ss are differentially motivated to achieve in response to the aforementioned three social reinforcement-feedback contingencies and (b) to determine whether Ss who are at different developmental levels are differentially motivated to achieve by these three classes of social reinforcement-feedback parameters.Item Infant and Juvenile-Directed Care Behaviors in Adult Toque Macaques, Macaca Sinica(1985) Baker-Dittus, Anne; Animal & Avian Sciences; Digital Repository at the University of Maryland; University of Maryland (College Park, MD)The identity of care-givers, and the distribution of care to young are examined in a free-ranging polygynous primate, Macaca sinica. Care behavior is used as one measure of investment in young. There is no evidence that dominance rank influences offspring sex, but high-ranking mothers provide more care to newborn infants than do low-ranking mothers. Mothers provide more care to infant and first year sons than to daughters. This supports Dittus's suggestion (1979, 1980) that mothers should schedule care to sons and daughters differently, providing high levels of care to sons before they emigrate from the natal group. Care to daughters is low per unit time, but continues over a long period because daughters remain in the natal group. Adult females, other than the mother, tolerate, groom and support young. These behaviors are low cost, relative to the high cost behaviors of nursing and carrying, which only mothers provide. Young tend to associate with adult female relatives. Unlike male-biased maternal care, adult female care is biased towards female young; and female young return care more than do male young . Adult female rank is positively correlated with the amount of support adult females provide to female young, and the amount of grooming they receive from female young. Adult female rank has no effect on any measure of association between adult females and male young. Taken together these findings suggest that reciprocal altruism has been important in shaping adult female interactions with young. Adult and subadult M. sinica males direct the low cost, affiliative behaviors of hugging, carrying and grooming towards male infants; and direct aggressive behaviors towards female infants. I suggest that the distribution of behaviors reflects their value to male and female young. Affiliative behaviors to male infants, and aggressive behaviors to female infants serve to channel infants into association with adults from whom they can learn appropriate sex-typical behaviors, and as such benefit both male and female infants. High cost care behaviors of support in agonistic interactions, and protection are provided only by the adult male, and are provided to male and female young equally.Item PREDICTIVE ACCURACY OF THIRD AND FIFTH GRADERS ON LINGUISTIC AND NON-LINGUISTIC COMPREHENSION MEASURES: THE RELATIONSHIP BETWEEN PERFORMANCE ON GRADUATED PASSAGE QUESTIONS UNDER LISTENING AND READING CONDITIONS AND THE STANDARD PROGRESSIVE MATRICES(1981) Alexander, Patricia; Garner, Ruth; Teaching, Learning, Policy & Leadership; Digital Repository at the University of Maryland; University of Maryland (College Park, MD)This study, as an investigation of predictive accuracy, examined the relationship of subjects' performance on a non-linguistic measure of comprehension, the Raven's Standard Progressive Matrices, to their performance on linguistic measures of comprehension, graduated passages and questions from the Barnell-Loft Specific Skills Drawing Conclusions Series. These linguistic passages and questions were presented under silent reading and listening conditions. All third graders and fifth graders at a suburban Maryland parochial school served as the study population from which twenty subjects at each grade level were randomly selected. This sample was comprised of eighteen males and twenty-two females. All subjects received all treatment levels which consisted of four tasks administered in two sessions. Session I included the administration of the Raven's, with the added verbalization of item C-9, and passages and questions presented in a silent reading mode. In Session II all subjects completed passages and questions presented in a listening mode and the Slosson Intelligence Test. The graduated passages and question were contained in Comprehension Inventory I and II which were administered in counterbalanced format. Half of the subjects received Inventory I as the listening task and II as the silent reading task, while half received Inventory I as the silent reading task and II as the listening task. The first question under research in this study was whether there was a relationship between linguistic and non-linguistic predictive accuracy. A multiple correlation technique was used to ascertain the relationship between the Raven's and the listening and silent reading linguistic comprehension measures. A correlation coefficient significantly different from zero was achieved in the comparison of subjects' performance data for these tasks. The second question addressed by this study was whether the relationship between the non-linguistic and the listening linguistic measure of predictive accuracy would be stronger than the relationship between the non-linguistic and the reading linguistic measure of predictive accuracy. Through the use of a partial correlation technique it was determined that the relationship between the Raven's and the listening task was not statistically stronger than the relationship between the Raven's and the silent reading task. Both partial correlations, however, were determined to be significantly different from zero. The third question investigated by this study was whether there was a significant relationship between the Raven's, as a non-linguistic measure of predictive accuracy, and the Slosson, as a linguistic measure of intellig ence. The coefficient produced by the Pearson Product-Moment technique was assessed to be significantly different from zero. Finally, the study sought to ascertain if there were developmental differences in predictive accuracy. At test for related samples produced significant differences for all outcome measures in the direction of the fifth-grade subjects. These findings confirmed the hypothesis that older students would perform the specified tasks at a higher level of predictive accuracy than younger students. Possible explanations of the outcomes of this investigation, and their relationship to research in the areas of language/thought, analogous reasoning, intelligence/cognition, reading/listening and comprehension/prediction were discussed, along with implications for theory, research, classroom and diagnostic practices.Item A Comparison of the Effectiveness of Demonstrations, Verbal Statements, and Hands-on Experiences on Correcting a Misconception of First-Graders Regarding Magnets(1987) Benbow, Ann E.; Lockard, J. David; Teaching, Learning, Policy & Leadership; Digital Repository at the University of Maryland; University of Maryland (College Park, MD)The purpose of this study was to compare the relative effectiveness of five instructional interventions which were designed to correct a size-related science misconception in a group of first graders. The particular misconception chosen for the study is the belief that larger magnets are always of greater strength than smaller magnets. These interventions consisted of: a. a demonstration lesson, b. a hands-on lesson, c. a verbal statements lesson, d. a demonstration-plus-verbal statements lesson, and e. a hands-on-plus-verbal statements lesson. At the beginning of each magnet lesson, students were first exposed to evidence contradicting the size-related magnet misconception. This was followed by the introduction of cognitive conflict via the use of a small weak rectangular magnet and a larger strong rectangular magnet to pick up paper clips. Finally, students interacted with two (apparently) identical rectangular magnets of clearly differing strengths. The second major component of each intervention was the use of iron filings and a magnet to "show" lines of force. The purpose of this last activity was to give the students some information about magnets that would assist them in accommodating the events witnessed in the first part of the intervention. Subjects were tested three days before the treatment, one day after treatment to determine change of knowledge effect, then six weeks after treatment as a check for knowledge retention. Six subjects were randomly chosen from each treatment group to be interviewed using a format based upon Novak's Interview-about-Instances (1984) prior to the instruction, and on two occasions (one day, and six weeks) after the instruction. It was hypothesized that a demonstration treatment would result in the highest frequency of students who received a score of 100% on four misconception-related items on the post-test. It was also hypothesized that the demonstration treatment would result in the greatest retention. Analysis of both test scores and interview data indicates that, although there is strong support for the corrective properties of a demonstration which directly confronts the misconception that a necessary direct relation ship exists between magnetic strength and magnet size, a demonstration alone is not more effective than all of the remaining treatments in achieving change of knowledge or retention. Therefore, there is a lack of support for both research hypotheses. Both treatments containing demonstrations, however, were more effective in achieving correction of the size-related misconception than the treatments consisting of a hands-on treatment alone and verbal statements alone.Item Women Correspondents in Vietnam: Historical Analysis and Oral Histories(1988) Martin, Christine; Hiebert, Ray; Journalism; Digital Repository at the University of Maryland; University of Maryland (College Park, MD)Although women correspondents have covered wars since the Spanish-American conflict, it was not until the Vietnam War that they achieved full access to the battlefield and equal opportunities to cover all aspects of the conflict. Easily attained army accreditation, the burgeoning women's movement and the unique nature of the Vietnam War - a Third World, essentially, political conflict - combined to offer women reporters unprecedented opportunities to cover the war and to prove themselves as worthy members of journalism's elite crew - war correspondents. More women covered Vietnam than any other war. They focused their coverage primarily on the "human interest" angle and the effects of war on its civilian and military victims. This traditional women's focus took on a new prominence in Vietnam, where an understanding of the social and political underpinnings of Vietnamese culture was essential to the success of the American war effort. As a result, the traditional news definition of war as battlefield was widened and the "women's angle" became central to war correspondence. This study presents an historical analysis of the evolution of the role of the woman war correspondent, from the Spanish- American conflict to Vietnam, and presents the oral histories of 10 women who worked as war correspondents in Vietnam.Item The Effects of Instruction in Sentence Combining and Revision on Ninth and Tenth Graders' Explanatory Writing(1989) Horstman, Franklin; Slater, Wayne H.; Teaching, Learning, Policy & Leadership; Digital Repository at the University of Maryland; University of Maryland (College Park, MD)In this study, I examined the effects of instruction in sentence combining on three measures of student writing : 1.) syntactic fluency; 2.) overall writing quality; and 3.) sentence -combining ability. Sentence combining is a method of writing instruction in which students rewrite a series of sentences into one syntactically more complex sentence. Two teachers instructed experimental group one (37 students) in sentence combining applied to revision. The same two teachers also instructed experimental group two (37 students) in sentence combining alone. A third teacher instructed the control students (38 students) in the standard ninth-grade English curriculum. To examine syntactic fluency, I analyzed students' writing for words per T-unit, clauses per T-unit, and words per clause. To examine overall writing quality, two trained raters assessed students' writing using forced choice holistic scoring. I also assessed students' sentence-combining ability. On syntactic fluency, the control group demonstrated statistically significant gains for mean number of words per clause. On overall writing quality, the control group also demonstrated statistically significant gains. On sentence-combining ability, both experimental group one and experimental group two demonstrated statistically significant gains. While the results do not support the first two research questions, on sentence-combining ability, the results suggest that ninth-grade writers can be taught sentence combining in a four-week, intensive instructional unit. Additionally, results suggest links between rhetorical and psychological theories and writing. However, the limitations of the results also suggest further sentence-combining research.Item The Folklore and Life of My Native Country in Pictorial Terms(1967) Al-Harithi, Naziha Rashid; Maril, Herman; Art; Digital Repository at the University of Maryland; University of Maryland (College Park, MD)The content of this thesis exhibition is involved in exploration of the folklore and life of the people of my native country in terms of a more contemporary painting language. Color symbols and patterns play a great role in these concepts.