Comparison of Lecture and Laboratory Strategies in a Mathematics Course for Prospective Elementary Teachers

1978 ◽  
Vol 9 (2) ◽  
pp. 103-117
Author(s):  
Roberta J. Flexer
Keyword(s):  
Elementary Teachers ◽  
Student Teaching ◽  
Number System ◽  
Mathematics Performance ◽  
Control Groups ◽  
Prospective Elementary Teachers ◽  
Course Retention ◽  
Teaching Of Mathematics ◽  
And Control

A 3-year study was conducted to compare the effectiveness of laboratory and lecture strategies in a course for prospective elementary teachers on the structure of the number system. Experimental and control groups were compared in terms of achievement in the course; retention on a follow-up examination given 6 months after the end of the course; attitude toward mathematics; performance in student teaching of mathematics; and responses to a questionnaire concerning the course. Within the experimental limitations of this study, there was no reason to conclude that either strategy was superior to the other. Implications concerning the design of preservice courses in mathematics are discussed.

A randomized trial of levamisole versus placebo as adjuvant therapy in malignant melanoma.

1991 ◽  
Vol 9 (5) ◽  
pp. 736-740 ◽  
Author(s):  
L E Spitler
Keyword(s):  
Malignant Melanoma ◽  
Adjuvant Therapy ◽  
Randomized Trial ◽  
Control Groups ◽  
Disease Free Interval ◽  
Significant Difference ◽  
Long Term Follow Up ◽  
And Control

We conducted a long-term follow-up (median, 10.5 years) of patients included in a randomized trial of levamisole versus placebo as surgical adjuvant therapy in 203 patients with malignant melanoma. Of the patients randomized, 104 received levamisole, and 99 received placebo. The results show that there is no difference between the treatment and control groups with regard to any of the three end points analyzed. These included disease-free interval, time to appearance of visceral metastasis, and survival. Moreover, there was no significant difference between the treatment and control groups after adjusting for age, sex, or stage of disease.

scholarly journals Striatal glutamate and the conversion to psychosis: a prospective 1H-MRS imaging study

2012 ◽  
Vol 16 (2) ◽  
pp. 471-475 ◽  
Author(s):  
Camilo de la Fuente-Sandoval ◽  
Pablo León-Ortiz ◽  
Mariana Azcárraga ◽  
Rafael Favila ◽  
Sylvana Stephano ◽  
...  
Keyword(s):  
Proton Magnetic Resonance ◽  
Proton Magnetic Resonance Spectroscopy ◽  
Imaging Study ◽  
Psychotic Symptoms ◽  
Resonance Spectroscopy ◽  
Control Groups ◽  
1H Mrs ◽  
Ultra High Risk ◽  
And Control

Abstract Increased glutamate levels in the associative-striatum have been described in subjects at ultra-high risk for psychosis (UHR); nevertheless, it is unclear whether this abnormality predicts the conversion to psychosis. Nineteen subjects at UHR and 26 controls were studied using proton magnetic resonance spectroscopy. Subjects at UHR were clinically followed for 2 yr. Seven UHR subjects (37%) transitioned to a psychotic disorder and the remaining 12 did not exhibit psychotic symptoms at the most recent follow-up. The psychosis transition group had higher glutamate levels compared to both non-transition and control groups (p = 0.02 and p < 0.01, respectively; effect size 1.39). These pilot findings suggest that the conversion to psychosis is associated with increased glutamate levels in the associative-striatum.

scholarly journals An Improved Model for Evaluating Change in Randomized Pretest, Posttest, Follow-Up Designs

Methodology ◽  
2012 ◽  
Vol 8 (3) ◽  
pp. 97-103 ◽  
Author(s):  
Constance A. Mara ◽  
Robert A. Cribbie ◽  
David B. Flora ◽  
Cathy LaBrish ◽  
Laura Mills ◽  
...  
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Group Differences ◽  
Primary Research ◽  
Control Groups ◽  
Proposed Model ◽  
Research Questions ◽  
Improved Model ◽  
And Control

Randomized pretest, posttest, follow-up (RPPF) designs are often used for evaluating the effectiveness of an intervention. These designs typically address two primary research questions: (1) Do the treatment and control groups differ in the amount of change from pretest to posttest? and (2) Do the treatment and control groups differ in the amount of change from posttest to follow-up? This study presents a model for answering these questions and compares it to recently proposed models for analyzing RPPF designs due to Mun, von Eye, and White (2009) using Monte Carlo simulation. The proposed model provides increased power over previous models for evaluating group differences in RPPF designs.

scholarly journals Olfactory Dysfunction in β Thalassemia Major Patients Treated With Iron-Chelating Agents

2019 ◽  
Vol 98 (8) ◽  
pp. NP125-NP130
Author(s):  
Serhan Derin ◽  
Selvet Erdogan ◽  
Murat Sahan ◽  
Mehmet Fatih Azik ◽  
Hatice Derin ◽  
...  
Keyword(s):  
Chelating Agents ◽  
Thalassemia Major ◽  
Olfactory Dysfunction ◽  
Facial Trauma ◽  
Control Group ◽  
Control Groups ◽  
History Of ◽  
And Control ◽  
Iron Chelating Agents

Ocular and ophthalmological adverse effects may be seen in β-thalassemia major (BTM) patients treated with regular blood transfusions and iron-chelating agents. We hypothesized that olfactory dysfunction may be present in this population. In this study, we aimed to investigate olfactory dysfunction in patients with BTM and determine the etiological factors. A total of 43 patients with BTM were included in the study. Forty-three patients without any nasal complaints, history of facial trauma, or nasal surgery were included as the controls. All participants had nasal endoscopy. The iron-chelating agents used, their duration of use, as well as hemoglobin and ferritin levels of the BTM patients were recorded. Sniffin’ Sticks test (SST) was used to assess olfactory functions, and BTM and control groups were compared for the results. The correlations of SST scores with the other study parameters were analyzed. Eight (18.6%) of 43 patients in the BTM group had hyposmia while none of the patients in the control group had hyposmia ( P < .001). Older age, low-hemoglobin level, and longer use of deferoxamine were found to be correlated with olfactory dysfunction. Olfactory dysfunction may be seen in BTM patients treated with iron-chelating agents. The results of this study suggest that screening for olfactory function may be needed in routine follow-up of BTM patients.

scholarly journals Time taken to resume driving following hip arthroscopy

2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Suenghwan Jo ◽  
Sang Hong Lee ◽  
Se Woong Jang ◽  
Hyun Bai Choi ◽  
Ba Rom Kim ◽  
...  
Keyword(s):  
Hip Arthroscopy ◽  
Driving Simulator ◽  
Driving Performance ◽  
Control Group ◽  
Control Groups ◽  
Test Protocol ◽  
Surgery Group ◽  
Time Required ◽  
And Control

Abstract Background Resuming driving is a common concern among patients undergoing hip arthroscopy. The present study aimed to assess whether patients who had undergone right hip arthroscopy presented with poorer driving performance than patients with normal hips and to analyze the time required to regain preoperative driving performance. Methods Forty-seven patients who had undergone right hip arthroscopy and consented to our test protocol were included in this study. Using an immersive driving simulator, the patients were tested for their brake reaction time (BRT), total brake time (TBT), and brake pedal depression (BPD) preoperatively and postoperatively. The first postoperative assessments were conducted when the patients could comfortably sit on the driving seat, and the follow-up assessments were conducted for 6 consecutive weeks at weekly intervals. The patients were divided into the following two groups based on the type of surgery that they underwent: the femoroacetabular impingement (FAI) surgery group and the simple hip arthroscopy (SA) group. Twenty healthy volunteers underwent driving assessments thrice at weekly intervals and constituted the control group. The braking parameters were compared between preoperative and postoperative measurements and among the FAI surgery, SA, and control groups. Results The preoperative braking parameters of the patients who underwent arthroscopy did not differ significantly from those of the controls (p = 0.373, 0.763, and 0.447 for the BRT, TBT, and BPD, respectively). All braking parameters returned to normal in 2 weeks in the FAI surgery group and in 1 week in the SA group. Conclusions Our study suggests that the driving performance of patients who underwent right hip arthroscopy is comparable to that of individuals with normal hips and that the braking parameters may normalize to the preoperative state at 1 week after SA and 2 weeks after FAI surgery.

Piano-accompanied solfège reading experiences of preservice music teachers

2020 ◽  
pp. 1321103X1987107
Author(s):  
Elif Guven
Keyword(s):  
Music Teachers ◽  
Control Group ◽  
Reading Practices ◽  
Control Groups ◽  
Plot Analysis ◽  
Experimental Implementation ◽  
Significant Difference ◽  
And Control ◽  
Experimental Group

This study examines how piano-accompanied solfège reading practices of preservice music teachers ( N = 28) affect their performance on their musical hearing, reading, and writing (MHRW) classes. A pretest–posttest design with control groups was employed. The data were analyzed by 2 × 2 split-plot analysis of variance (ANOVA) and one-way ANOVA. Consequently, a significant difference was not found between the MHRW performance scores of the experimental and control groups. An analysis of mean performance scores revealed that the scores received by the control group were higher than those of the experimental group after the practice. Follow-up interviews that were held with 14 students after the experimental implementation revealed that students believed piano-accompanied courses were more useful, and they felt more comfortable with piano accompaniment. Although MHRW performance scores indicated that piano-accompanied solfège reading practices did not have a significant effect on preservice music teachers’ MHRW performances, it helped them participate in courses more enthusiastically.

scholarly journals Challenges and results of a school-based intervention to manage excess weight among school children in Tunisia 2012–2014

2017 ◽  
Vol 29 (2) ◽  
Author(s):  
Jihen Maatoug ◽  
Sihem Ben Fredj ◽  
Zeineb Msakni ◽  
Emna Dendana ◽  
Jihene Sahli ◽  
...  
Keyword(s):  
School Children ◽  
The Body ◽  
Calorie Intake ◽  
Control Group ◽  
Control Groups ◽  
Post Intervention ◽  
School Based ◽  
Increased Risk ◽  
And Control

Abstract Background: Obesity is a serious health issue and predisposes individuals to an increased risk of morbidity and mortality. Its prevalence in children has increased worldwide. Objective: To demonstrate the feasibility and effectiveness of a school-based management program based on healthy lifestyle promotion for obese and overweight adolescents in Sousse, Tunisia. Methods: We conducted a quasi-experimental study among overweight and obese school children enrolled in 7th and 8th grades in Sousse, Tunisia with two groups, intervention and control. The 1-year intervention was based on promoting healthy eating and physical activity through a collective intervention for all recruited children and an individual intervention only for obese children who require intensive managing. Data collection was done before, at the end and at a 4-month follow up of the intervention, both in intervention and control groups. Results: The body mass index Z score decreased significantly from pre-intervention to post-intervention (1.89±0.57 to 1.76±0.63, p<0.001) and from post-intervention to the follow-up (1.76±0.63 to 1.55±0.68, p<0.001) in the intervention group. In the control group, it decreased significantly from pre-intervention to post-intervention but not significantly from post-intervention to follow-up assessment. Calorie intake decreased significantly both in intervention and control groups. Conclusion: This project began with introducing a new culture of health management in schools on one side and with increasing awareness of the importance of obesity prevention and treatment. The support of authorities for this type of action is very important to guarantee its sustainability.

scholarly journals Age at Vaccination and Timing of Infection Do Not Alter Vaccine-Associated Enhanced Respiratory Disease in Influenza A Virus-Infected Pigs

2016 ◽  
Vol 23 (6) ◽  
pp. 470-482 ◽  
Author(s):  
Carine K. Souza ◽  
Daniela S. Rajão ◽  
Crystal L. Loving ◽  
Phillip C. Gauger ◽  
Daniel R. Pérez ◽  
...  
Keyword(s):  
Respiratory Disease ◽  
Influenza A Virus ◽  
Influenza A ◽  
Control Groups ◽  
Swine Industry ◽  
Vaccine Component ◽  
Live Attenuated Influenza Virus ◽  
And Control ◽  
The Impact

ABSTRACTWhole inactivated virus (WIV) vaccines are widely used in the swine industry to reduce clinical disease against homologous influenza A virus (IAV) infection. In pigs experimentally challenged with antigenically distinct heterologous IAV of the same hemagglutinin subtype, WIV vaccinates have been shown to develop vaccine-associated enhanced respiratory disease (VAERD). We evaluated the impact of vaccine valency, age at vaccination, and duration between vaccination and challenge on the development of VAERD using vaccine containing δ1-H1N2 and challenge with pandemic H1N1 (pH1N1) virus. Pigs were vaccinated with monovalent WIV MN08 (δ1-H1N2) and bivalent (δ1-H1N2–H3N2 or δ1-H1N2–pH1N1) vaccines and then were challenged with pH1N1 at 3 weeks postboost (wpb). Another group was vaccinated with the same monovalent WIV and challenged at 6 wpb to determine if the time postvaccination plays a role in the development of VAERD. In a follow-up study, the impact of age of first WIV vaccination (at 4 versus 9 weeks of age) with a boost 3 weeks later (at 7 versus 12 weeks of age) was evaluated. A monovalent live-attenuated influenza virus (LAIV) vaccine administered at 4 and 7 weeks of age was also included. All mismatched WIV groups had significantly higher lung lesions than the LAIV, bivalent MN08-CA09, and control groups. Age of first vaccination or length of time between booster dose and subsequent challenge did not alter the development of VAERD in WIV-vaccinated pigs. Importantly, the mismatched component of the bivalent MN08-CA09 WIV did not override the protective effect of the matched vaccine component.

scholarly journals PERIOPERATIVE ANESTHESIA: TO DO OR NOT TO DO?

2018 ◽  
Vol 25 (2) ◽  
pp. 36-40
Author(s):  
S. A. Firsov ◽  
A. S. Lepilov ◽  
R. P. Matveev ◽  
V. S. Savinkin
Keyword(s):  
Hip Arthroplasty ◽  
Motor System ◽  
Main Group ◽  
Narcotic Analgesic ◽  
Control Group ◽  
Control Groups ◽  
Treatment Results ◽  
Analog Scale ◽  
And Control

Introduction. In patients with chronic loco-motor system diseases the pain often persists after arthroplasty and does not respond to symptomatic therapy.Purpose of study: to evaluate the efficacy of perioperative use of Meloxicam in patients after hip arthroplasty. Patients and methods. The follow-up covered 120 patients (mean age 64.4±5.23 years) after hip arthroplasty. In the main group (n=60) Meloxicam was given 7 days prior to and 3 weeks after surgery; after intervention narcotic analgesic was used on the request. In control group (n=60) the patients were only on narcotic analgesic on request after operation. Treatment results were assessed by 100-millimeter visual analog scale (VAS) and D’Aubigné-Postel Score.Results. Seven days before the surgery the pain severity in the main and control groups was comparable: 85±2.3 and 84±2.1, respectively. In 2 days after operation the pain relief was more pronounced in the main group — 69±2.1 mm versus 82±3.4 mm in the control group (p0.05). In 3 months those indices made up 10±2.1 and 35±12.6 mm (p0.001), respectively. In the main group the result was assessed as the excellent and good in 22 patients, in the rest of patients as satisfactory by d’Aubigné-Postel Score. In the control group the good result was recorded in 9, satisfactory — in 47 and poor — in 4 cases.Conclusion. Meloxicam may be considered as an effective perioperative analgesic in large joints arthroplasty.

scholarly journals Expressive writing changes grief into meaning – a sequential explanatory design approach

2019 ◽  
Vol 4 (3) ◽  
pp. 102
Author(s):  
Setiawati Intan Savitri ◽  
Bagus Takwin ◽  
Amarina Ashar Ariyanto ◽  
Rachel T.A Aribowo
Keyword(s):  
Expressive Writing ◽  
Sequential Design ◽  
Control Group ◽  
Baseline Score ◽  
Control Groups ◽  
Matching Technique ◽  
Post Test ◽  
And Control ◽  
Experimental Group

The purpose of the present study was to describe the effect of expressive writing on the level of one’s grief through a sequential design (expressive writing experiments for 3 consecutive days for 15 minutes each days then an analysis of the participant’s writing contents was conducted). This study used a pre-post test matching technique experimental design follow up by content analysis. The total number of participants (both in the experimental and control groups) was 30 (M-age = 21.2; SD = 1.2), lost their parents more than six month. Randomized matching technique was use to divide participant into experimental (expressive writing) and control (non-expressive writing).The baseline score measured by the complicated grieving inventory of >25 (Prigereson, 1995). Results showed that the experimental group had a decreased level of grief relative to the control group, the texts showed an interested result to be further discussed.

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