scholarly journals Representations of rectilinear light propagation in the thinking of 12-13 year olds: A transformative teaching intervention

2021 ◽  
Vol 10 (2) ◽  
pp. 191-199
Author(s):  
Alyona Grigorovitch
Keyword(s):  
Statistical Analysis ◽  
Light Propagation ◽  
Mental Representations ◽  
Sampling Technique ◽  
Traditional School ◽  
Transformative Teaching ◽  
Effective Interventions ◽  
Propagation Of Light ◽  
School Teaching ◽  
Quasi Experimental

This research investigates the transformation of the seventh-grade students' mental representations of the rectilinear propagation of light. The researcher employed the quasi-experimental method on two groups of students aged 12-13 years. The survey involved 102 students who were divided into two equal groups determined by the stratified sampling technique. The first group participated in a didactic intervention based on the students' representations. The second group of students participated in a traditional school teaching. The Mann–Whitney U test was utilized for calculating the significance of the data. The statistical analysis showed that the pretest and the posttest progress was statistically significant for the first group. It resulted in the mental constitution of a representation that is compatible with the scientific model.The research results allow the design of effective interventions for the teaching of light propagation and geometric optics in general.

scholarly journals Pengaruh Model Pembelajaran Problem Based Learning pada Materi Hukum-Hukum Dasar Kimia terhadap Hasil Belajar Siswa Kelas X MAN 2 Model Palu

2018 ◽  
Vol 7 (3) ◽  
pp. 102
Author(s):  
Tri Sulistiyawati Lamalat ◽  
Supriadi Supriadi ◽  
Siti Nuryanti
Keyword(s):  
Statistical Analysis ◽  
Learning Outcomes ◽  
Problem Based Learning ◽  
Sampling Technique ◽  
Learning Model ◽  
Mean Value ◽  
Control Group ◽  
Control Group Design ◽  
Average Value ◽  
Quasi Experimental

Research on the effect of the problem-based learning model in the basic laws of chemistry on student’s learning outcomes in class X MAN 2 Model Palu has been done. This study aimed to determine the effect of the application of the problem-based learning model in the basic laws of chemistry on student’s learning outcomes in class X MAN 2 Model Palu. The type of research was a quasi-experimental study non-randomized design with pretest-posttest control group design. The sample was conducted with a purposive sampling technique. The study sample was students in class X MIA 6 as an experimental group (n = 22) and students in class X MIA 3 as a control group (n = 22). The data testing of students' learning outcomes used a non-parametric statistical analysis, the analysis of Mann-Whitney U-Test. The research results indicated that the mean value of the experiment class was high compared to the control class, 22.61 >18.39. The statistical analysis obtained that sig. 2-tailed (0,032) ˂ 0.05 and Zcalculation (-2.149) ˂ Ztable (-1.96). The average value of the experiment class was 82.95 while the average value of the control class was 73.64. So it can be concluded that there is the effect of applying the problem-based learning model in the basic laws of chemistry on student’s learning outcomes. 

scholarly journals PENGARUH PEMBERIAN KOMPRES KOL TERHADAP PENURUNAN PEMBENGKAKAN PAYUDARA PADA IBU POST PARTUM DI KLINIK BERSALIN KASIH IBU DELI TUA KABUPATEN DELI SERDANG TAHUN 2019

2020 ◽  
Vol 2 (2) ◽  
pp. 144-150
Author(s):  
Putri Ayu Yessy Ariescha ◽  
Andayani Boang Manalu ◽  
Nurul Aini Siagian ◽  
Mutiara Dwi Yanti ◽  
Rehulina Tarigan
Keyword(s):  
Statistical Analysis ◽  
Significant Influence ◽  
Post Partum ◽  
Sampling Technique ◽  
Research Subjects ◽  
Quasi Experimental ◽  
Common Problems ◽  
Convenience Sampling ◽  
Postpartum Mothers ◽  
Paired T Test

One of common problems associated with breastfeeding is breast engorgement. This breast swelling can cause the mother to stop breastfeeding. This study aims to determine the effect of cabbage compresses on reducing breast engorgement in postpartum mothers at Kasih Ibu Primary Clinic in Deli Tua in 2019. The research used quasi-experimental, one-group pretest-posttest method design. The sampling technique used convenience sampling to recruit 30 postpartum mothers who had breast engorgement. The instrument used to measure breast swelling was the breast engorgement assessment scale of Hill and Hummenick which consisting of a scale of 1 to 6. Application of cabbage compresses was done by attaching cabbage to the breast until the cabbage withers. This procedure was repeated four times every 6 hours per day, for 2 days. The results of the study showed that at the time before being compressed all the research subjects had a score of 4. On the 1st day of compressing with cabbage leaves, there were 7 people (23.3%) who had decreased breast swelling and on the 2nd day of compressing, the total postpartum mothers experienced a decreased in breast engorgement was 9 people (30%). Statistical analysis by paired t-test obtained the value of p = 0.001 (p <0.05). Thus, the results of this study concluded that there was a significant influence of cabbage compresses to decrease breast engorgement of the postpartum mothers at Kasih Ibu Primary Clinic in Deli Tua in 2019.

scholarly journals PENINGKATAN PEMAHAMAN KONSEP MATEMATIS MELALUI PEMBELAJARAN KONTEKSTUAL PADA SISWA SEKOLAH MENENGAH PERTAMA

2019 ◽  
Vol 3 (2) ◽  
pp. 144
Author(s):  
Nilam Sari
Keyword(s):  
Statistical Analysis ◽  
Junior High School ◽  
Sample Selection ◽  
Sampling Technique ◽  
Analysis Of Covariance ◽  
Contextual Approach ◽  
Mathematical Concepts ◽  
Concept Understanding ◽  
Quasi Experimental ◽  
Better Than

This study aims to find out: whether an increase in understanding of mathematical concepts students who learn using contextual approaches is better than students who get conventional learning. This research is a quasi-experimental study. The population of this study was seventh grade students of junior high school. Sample selection is done by cluster random sampling technique. The instrument used is concept understanding tests. The instrument was stated to have fulfilled the requirements for content validity, and the reliability coefficient was 0.77. The data in this study were analyzed using descriptive statistical analysis and parametric statistical analysis. Statistical analysis was carried out by analysis of covariance (ANACOVA). The findings of this study are that there is an increase in the ability to understand mathematical concepts of students who use contextual learning better than students who use conventional learning. From the results of the study it is suggested: (1) Learning with a contextual approach is one alternative for mathematics teachers in presenting mathematics subject matter (2) to other researchers who can continue their research on other subjects and mathematical abilities using a contextual approach

scholarly journals Effectiveness of STAD Cooperative Learning Model with LKS Help on Mathematical Learning Outcomes of Class VIII Students

2018 ◽  
Vol 3 (2) ◽  
pp. 47-53
Author(s):  
Istiqfar Istiqfar ◽  
Irma Magfirah
Keyword(s):  
Statistical Analysis ◽  
Cooperative Learning ◽  
Learning Outcomes ◽  
Mathematics Learning ◽  
Descriptive Analysis ◽  
Sampling Technique ◽  
Learning Model ◽  
Eighth Grade Students ◽  
Quasi Experimental ◽  
Class Viii

The learning outcomes of mathematics are one of the benchmarks of the high and low quality of a mathematics learning process. This study aims to find out how the effectiveness of STAD type cooperative learning model with the help of worksheets on mathematics learning outcomes of class VIII students at MTs. Muhammadiyah Palleko in Takalar in 2014/2015 academic year. This research is quasi-experimental or quasi-experimental research. The instrument used in this study is the essay type learning test with a sample of 35 people, and the sampling technique used is saturated samples. The data analysis technique used is descriptive statistical analysis and inferential statistical analysis. Based on the results of descriptive analysis obtained the average of the two groups, namely the experimental class before treatment (pre-test) of 59.16 and after the surgery of (posttest) 75.61, the average pre-test control class was 54.56, and the post-test average is 58.25. Whereas based on the results of relative efficiency and inferential analysis it can be concluded that the STAD type of cooperative learning model with the help of LKS is effective in improving the mathematics learning outcomes of the eighth-grade students of MTs. Muhammadiyah Palleko District of Taylar.

scholarly journals MARITAL DISSATISFACTION AMONG NEWLY MARRIED TEACHERS

2019 ◽  
Vol 7 (8) ◽  
pp. 6-12
Author(s):  
Dr Muraina Kamilu Olanrewaju ◽  
Udeh Godfre Emeka
Keyword(s):  
Sampling Technique ◽  
Simple Random Sampling ◽  
Emotionally Focused Therapy ◽  
Control Group ◽  
Effective Interventions ◽  
Significant Difference ◽  
Emotionally Focused ◽  
Quasi Experimental ◽  
Marital Dissatisfaction ◽  
Newly Married

Marital dissatisfaction is the most important issue in marital life which has the highest effect on the stability and failure of couples’ lives. Therefore, this study explored the efficacy of Emotionally Focused Therapy and religiosity on marital dissatisfaction among newly married teachers in Ibadan, Oyo State. Pretest-posttest, control group quasi-experimental design with a 2x2 factorial matrix was used in the study. Simple random sampling technique was used in sampling 80 participants from 4 local government areas in the state. The respondents were measured with validated marital dissatisfaction scale with a reliability coefficient of .87 and the data obtained was analysed using t-test statistical analysis. The result showed that there was a significant difference in marital dissatisfaction among newly married teachers exposed to emotionally focused therapy and those in the control group and newly married teachers with high religiosity and those with low religiosity. In view of these findings, the study recommended that counselling psychologists should intensify their effort to organize conferences on the implications of emotionally focused therapy and religiosity as effective interventions towards reducing marital dissatisfaction.

scholarly journals Effects of Mindfulness with Gayatri Mantra on Decreasing Anxiety in the Elderly

2018 ◽  
Vol 1 (1) ◽  
pp. 35
Author(s):  
Sang Ayu Ketut Candrawati ◽  
Meidiana Dwidiyanti ◽  
Rita Hadi Widyastuti
Keyword(s):  
Quality Of Life ◽  
Statistical Analysis ◽  
Experimental Design ◽  
Elderly People ◽  
Sampling Technique ◽  
The Elderly ◽  
Complementary Therapy ◽  
P Value ◽  
Quasi Experimental

Background: Anxiety is one of the psychological problems which can develop in the elderly. If left untreated, it can decrease the productivity and quality of life. Mindfulness with Gayatri mantra is such a complementary therapy which is effective to reduce anxiety in the elderly.  Objective: The purpose of this study was to determine the effects of mindfulness with Gayatri mantra on decreasing anxiety in the elderly Hindus in Bali, Indonesia. Methods: This study employed a one group pre and posttest quasi-experimental design and involved 34 elderly people recruited using a purposive sampling technique. Anxiety was measured using the Geriatric Anxiety Scale (GAS). A t-test statistical analysis was used to analyze the data.   Results: Results showed that there were significant effects of mindfulness with Gayatri mantra on decreasing the anxiety in the elderly Hindus in Bali with a p-value of 0.000 (α-value = 0.05). Conclusion: Mindfulness with Gayatri mantra could decrease anxiety in the elderly Hindus. This therapy can be used as an alternative to prevent the recurrence of anxiety in the elderly.

Efektivitas Aroma Terapi Lemon untuk Menangani Emesis Gravidarum

2019 ◽  
Vol 11 (4) ◽  
pp. 277-284
Author(s):  
Vitrianingsih Vitrianingsih ◽  
Sitti Khadijah
Keyword(s):  
Pregnant Women ◽  
Sampling Technique ◽  
T Test ◽  
The Body ◽  
Nausea And Vomiting ◽  
P Value ◽  
Purposive Sampling ◽  
Body Tissues ◽  
Quasi Experimental ◽  
Paired T Test

Studi memperkirakan emesis gravidarum terjadi pada 50-90% kehamilan. Mual muntah pada kehamilan memberikan dampak yang signifikan bagi tubuh dimana ibu menjadi lemah, pucat dan cairan tubuh berkurang sehingga darah menjadi kental (hemokonsentrasi). Keadaan ini dapat memperlambat peredaran darah dan berakibat pada kurangnya suplay oksigen serta makanan ke jaringan sehingga dapat membahayakan kesehatan ibu dan janin. Salah satu terapi yang aman dan dapat dilakukan untuk mengurangi keluahan mual muntah pada ibu hamil adalah pemberian aromaterapi lemon. Penelitian bertujuan untuk mengetahui efektifitas aroma terapi lemon untuk menangani emesis gravidarum. Penelitian ini menggunakan rancangan Quasi experiment  dengan  one group pre-post test design. Populasi penelitian adalah ibu hamil yang mengalami emesis gravidarum di Kecamatan Berbah, Sleman. Jumlah sampel 20 ibu hamil trimester pertama yang diambil dengan teknik purposive sampling. Pengukuran mual muntah dilakukan debelum dan setelah  pemberian aromaterapi lemon menggunakan Indeks Rhodes. Analisa data menggunakan uji Paired t-test. Hasil penelitian didapatkan rata-rata skor mual muntah sebelum pemberian aromaterapi lemon berdasarkan Indeks Rhodes pada Ibu Hamil dengan emesis gravidarum yaitu 22,1 dan terjadi penurunan skor setelah pemberian aromaterapi lemon menjadi 19,8. Ada pengaruh pemberian aromaterapi lemon dengan pengurangan mual muntah pada ibu hamil (p-value = 0.017). Berdasarkan hasil penelitian dapat disimpulkan pemberian aromaterapi lemon efektif untuk mengurangi emesis gravidarum pada ibu hamil trimester pertama.  Kata kunci: aromaterapi lemon, emesis gravidarum THE EFFECTIVENESS OF LEMON AROMATHERAPY FOR HANDLING EMESIS GRAVIDARUM   ABSTRACT Studies estimate that nausea and vomiting (emesis gravidarum) occur in 50 – 90% of pregnancies. Nausea and vomiting of pregnancy have a significant impact on the body in which it makes a mother becomes weak, pale, and decreasing body fluid so that the blood becomes thick (hemoconcentration). This situation can slow down blood circulation and inflict the lack of oxygen and food supplies to the body tissues so that it can endanger the health of the mother and fetus. One of the therapies that is safe and can be conducted to reduce nausea and vomiting of pregnancy is by giving the lemon aromatherapy treatment. The research aims to determine the effectiveness of the aroma of lemon therapy to deal with emesis gravidarum. This study applied quasi-experimental research with one group pretest-posttest design. The population of this study was pregnant women who experienced emesis gravidarum. Furthermore, samples were 20 mothers from Berbah, Sleman taken by using a purposive sampling technique. Nausea and vomiting were assessed between before and after giving lemon aromatherapy using the Rhodes Index. The data were analyzed using the paired t-test. The mean score of nausea and vomiting before giving lemon aromatherapy on mother with emesis gravidarum based on the Rhodes Index was 22.1. However, it decreased after given lemon aromatherapy treatment to 19.8. Therefore, there was an effect on giving lemon aromatherapy treatment toward the decrease of nausea and vomiting for pregnant women (p-value = 0.017). Lemon aromatherapy is effective to reduce emesis gravidarum.  Keywords: lemon aromatherapy, emesis gravidarum

PENGARUH PENGGUNAAN MEDIA AUDIO DAN MOTIVASI BELAJAR SISWA TERHADAP HASIL BELAJAR BAHASA INDONESIA SISWA KELAS VSDN 001 RUMBAI KOTA PEKANBARU

2016 ◽  
Vol 5 (2) ◽  
pp. 158
Author(s):  
Asmardi '
Keyword(s):  
Student Learning ◽  
Learning Outcomes ◽  
Sampling Technique ◽  
Student Learning Outcomes ◽  
Higher Learning ◽  
Motivation To Learn ◽  
Quasi Experimental ◽  
High Motivation ◽  
Audio Media ◽  
Low Motivation

This study aims to reveal the influence of the use of Media Audio and Motivation Learning students to the Indonesian student learning outcomes through four formulation of the problem: (1) whether there is any influence student learning outcomes using audio media than the conventional way students learn?, (2) whether the student that have a high motivation using audio media to obtain higher learning outcomes than students to have high motivation to study by conventional means?, (3) whether students who have low motivation to learn by using audio media to obtain higher learning outcomes than students have low motivation to learn with the conventional way?, and (4) whether there is interaction between the use of audio media and students' motivation towards learning Indonesian? This research is a quasi experimental by treatment block. This research was conducted at SDN 001 Rumbai Pekanbaru semester odd years 2010/2011. Samples were taken with Porposive random sampling technique. Data were collected through the initial test and final test. Data were analyzed using t test and analysis of variance.The results of data analysis showed that: Students who studied on the basis of audio media to obtain higher learning outcomes than students who learn by conventional means. Students who have high motivation to learn with audio media to obtain higher learning outcomes than students who have high motivation to study by conventional means. Students who have low motivation to learn based on audio media to obtain higher learning outcomes than students who have low motivation to study by conventional means. There was no interaction between the audio media and students' motivation. It can be concluded that the audio media significantly influence student learning outcomes.

PENGARUH PEMBELAJARAN INOVATIF TERHADAP HASIL BELAJAR BAHASA INGGRIS SISWA KELAS VIIIB1 SMP NEGERI 2 GEROKGAK DENGAN PENGENDALIAN KECERDASAN LINGUISTIK

2019 ◽  
Vol 1 (1) ◽  
pp. 108-114
Author(s):  
I Made Wirta
Keyword(s):  
Sampling Technique ◽  
Analysis Of Covariance ◽  
Control Group ◽  
Learning Approaches ◽  
Control Group Design ◽  
Post Test ◽  
Quasi Experimental ◽  
Innovative Learning ◽  
Inferential Analysis ◽  
English Students

The main objective of the present study is to investigate the effect of implementing innovative learning approaches upon English students’ achievement. The study was quasi experimental study using the post-test only control group design involving 35 students altogether selected using census sampling technique. The instrument which is used to gather data in the study was test. There were two tests used to gather intended data. They were linguistic test and student achievement test. The obtained data were analyzed statistically using descriptive and inferential analysis. The analysis of covariance was conducted to test the hypotheses.

PROGRAM BIMBINGAN UNTUK MENINGKATKAN MOTIVASI BELAJAR SISWA

2017 ◽  
Vol 17 (1) ◽  
pp. 55
Author(s):  
Ismaniar Ismaniar Ismaniar
Keyword(s):  
Experimental Design ◽  
Quantitative Research ◽  
Sampling Technique ◽  
Learning Motivation ◽  
Control Group ◽  
Research Approach ◽  
Purposive Sampling ◽  
Guidance Program ◽  
Quasi Experimental ◽  
11Th Grade

The present study is aimed at developing effective guidance program for increasing student’s learning motivation. The present study applies quantitative research approach with nonequivalent pre-posttest control group quasi-experimental design, and nonrandom-purposive sampling technique. The data were collected using inventory, interview, and documentary study. The study comes up with the main finding that the tested guidance program is proven to be effective for increasing learning motivation students of 11th grade at SMA Kartika XIX-2 Bandung.

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