scholarly journals How much bias results if a quasi-experimental design combines local comparison groups, a pretest outcome measure and other covariates?: A within study comparison of preschool effects.

2020 ◽  
Vol 25 (6) ◽  
pp. 726-746 ◽  
Author(s):  
Thomas D. Cook ◽  
Naixin Zhu ◽  
Alice Klein ◽  
Prentice Starkey ◽  
Jaime Thomas
2018 ◽  
Vol 48 (2) ◽  
pp. 295-306 ◽  
Author(s):  
Falko Tesch ◽  
Lukas Hohendorf

Changes in opening hours for on-premise drinking places may influence the level of alcohol-related violence in two ways. The increased availability of alcohol increases the risks associated with it, while restrictive opening hours may produce more occasions for crime due to overcrowding at closing time. We use a quasi-experimental design with data from 13 Bavarian towns with and without restrictive opening hours and a negative binomial panel model. The outcome measure is violent incidents reported by the police between 2:00 a.m. and 6:00 a.m. over the period of 12 years. Incidents at night disproportionally increase over the study period in the sample. After controlling for daily violence as well as for an interaction between policy regime and violence level, we find that restricted opening hours are only beneficial within settings of a low daily violence level.


1994 ◽  
Vol 79 (1) ◽  
pp. 11-15 ◽  
Author(s):  
Lex L. Merrill

It was hypothesized that, given their stressful working conditions, nuclear weapons workers would show more anxiety indicators on the Draw-A-Person test. Three groups ( ns = 9) were given the test and their drawings were scored with Handler's 1967 objectively scorable indexes. A posttest-only design with two nonequivalent comparison groups was employed. Nuclear weapons workers had a reliably higher number of anxiety indicators on their Draw-A-Person drawings than the two comparison groups. These preliminary results indicate that Handler's objectively scorable indexes may be of value in detecting anxiety in the work place. The conclusions are tempered by the small groups and the quasi-experimental design used but indicate that further research could be fruitful.


Crisis ◽  
2016 ◽  
Vol 37 (6) ◽  
pp. 415-426 ◽  
Author(s):  
Yik-Wa Law ◽  
Paul S. F. Yip ◽  
Carmen C. S. Lai ◽  
Chi Leung Kwok ◽  
Paul W. C. Wong ◽  
...  

Abstract. Background: Studies have shown that postdischarge care for self-harm patients is effective in reducing repeated suicidal behaviors. Little is known about whether volunteer support can help reduce self-harm repetition and improve psychosocial well-being. Aim: This study investigated the efficacy of volunteer support in preventing repetition of self-harm. Method: This study used a quasi-experimental design by assigning self-harm patients admitted to the emergency departments to an intervention group with volunteer support and treatment as usual (TAU) for 9 months and to a control group of TAU. Outcome measures include repetition of self-harm, suicidal ideation, hopelessness, and level of depressive and anxiety symptoms. Results: A total of 74 cases were recruited (38 participants; 36 controls). There were no significant differences in age, gender, and clinical condition between the two groups at the baseline. The intervention group showed significant improvements in hopelessness and depressive symptoms. However, the number of cases of suicide ideation and of repetition of self-harm episodes was similar for both groups at the postintervention period. Conclusion: Postdischarge care provided by volunteers showed significant improvement in hopelessness and depression. Volunteers have been commonly involved in suicide prevention services. Further research using rigorous methods is recommended for improving service quality in the long term.


1980 ◽  
Vol 25 (10) ◽  
pp. 772-775 ◽  
Author(s):  
GENE V. GLASS ◽  
J. WILLIAM ASHER

2019 ◽  
Vol 1 (1) ◽  
pp. 22
Author(s):  
Carla Marilia Ayala Valladares ◽  
Juana Maria Cruz Montero ◽  
Angel Saldarriaga Melgar

The main purpose of the research was to determine the effects of the program of ludic activities for the learning of geometry in children of five years in all their dimensions orientation and location, geometric shapes and measurement, through its components: location in space, identify locations and positions of objects, identify and characterize geometric figures and communicate the qualities of these, likewise identify, classify magnitudes and use various measuring instruments. The type of research was applied, with a quasi-experimental design, the population was constituted by 103 children, and a non-probabilistic sample was used for convenience with a sample of 51 children, divided into two control and experimental groups. The geometry instrument was used to collect information. The favorable effect of the program of playful activities in the learning of geometric notions in children of initial - Callao, 2018 was determined.


2017 ◽  
Vol 17 (1) ◽  
pp. 55
Author(s):  
Ismaniar Ismaniar Ismaniar

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.


2019 ◽  
Vol 2 (5) ◽  
pp. 220
Author(s):  
Jeni Kristiana Pattisina ◽  
Komala Komala

This research is important to develop the ability to think logically groups of 3-4 years. This research develops aspects of early childhood development, namely the ability to think logically. The purpose of this study was to determine the development of the ability to think logically 3-4 years of age through media mixing games. This type of research conducted by researchers is to use Quasi Experimental design with Nonequivalent Group Pretest Posttest Design. The results of the study showed the results of the SPPSS version 22 test get a sig value of 0.616> 0.05, thus Ha was accepted and Ho was rejected. If Ha is accepted then this shows that learning media mixing colors gives an influence on the development of logical thinking of children aged 3-4 years. Through the method of mixing colors in this study the teachers can not only develop the ability to think logically, but also can be done to develop several other aspects of development in children.Penelitian ini penting untuk  mengembangan kemampuan berpikir logis kelompok 3-4 tahun. Penelitian ini mengembangkan aspek perkembangan anak usia dini yaitu  kemampuan berpikir logis. Adapun tujuan dari penelitian ini untuk mengetahui pengembangan kemampuan berpikir logis usia 3-4 tahun melalui media permainan mencampur warna. Jenis penelitian yang dilakukan oleh peneliti adalah menggunakan Quasi Experimental dengan desain jenis Nonequivalent Group Pretest Posttest Design. Hasil dari penelitian menunjukkan hasil perhitungan uji SPPSS versi 22 tersebut mendapatkan nilai sig 0,616 > 0,05 dengan dengan demikian Ha diterima dan Ho di tolak. Jika Ha diterima maka hal ini menunjukan bahwa media pembelajaran mencampur warna memberikan pengaruh terhadap perkembangan berpikir logis anak usia 3-4 tahun. Melalui metode pencampuran warna dalam penelitian ini para guru tidak hanya dapat mengembangkan kemampuan berpikir logis saja tetapi juga dapat dilakukan untuk mengembangkan beberapa aspek-aspek perkembangan lainnya pada anak 


2021 ◽  
pp. 204275302098701
Author(s):  
Ünal Çakıroğlu ◽  
Mustafa Güler

This study attempts to determine whether gamification can be used as a pedagogical technique to overcome the challenges in teaching statistics. A post-test quasi-experimental design was carried out in gamified and non-gamified groups in order to reveal the effect of gamification elements in cultivating students’ statistical literacy skills. Students in gamified group were also interviewed to understand the function of gamification process. The results suggest that; although gamifying the instructional process had a positive impact on developing students’ statistical literacy in medium and high score students; surprisingly the influence of the gamification to the low- achieved scores were not positive. The positive impact was discussed in accordance with the gradual structure of statistical literacy and suggestions for successful gamification applications due to the context were included.


2018 ◽  
Vol 7 (1) ◽  
pp. 13 ◽  
Author(s):  
Carol Boon Peng Loy-Ee ◽  
Patricia Mui Hoon Ng

Studies have pointed to the benefits of physical activity (PA), yet the level of PA participation among preschoolers islow. This in turn could have resulted in the limited research literature on the PA level or physical educationcurriculum (PEC) of preschool children. Those reviewed here are mostly from countries in the West, as those fromAsia are unavailable. To fill this gap, the present study was carried out to investigate the effectiveness of a formalPEC on the physical ability of a sample of five-year old children from several preschools in Singapore. Using aPhysical Ability Assessment (PAA) tool with five variables, a pre-test/post-test quasi-experimental design was usedto measure the effectiveness of the PEC with control and experimental groups for the comparative analysis. Theresults of the PAA are presented and the implications from the findings and analysis are discussed.


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