Internal Validity of Group Experimental Research

1983 ◽  
Vol 4 (3) ◽  
pp. 77-83
Author(s):  
Jean R. Harber
Keyword(s):  
Research Design ◽  
Experimental Research ◽  
Internal Validity ◽  
Experimental Designs ◽  
Causal Relationships ◽  
Control Groups ◽  
Quasi Experimental ◽  
Research Studies

This article stresses the importance of controlling extraneous variables when studying educational problems. Various types of research studies are described. The experimental research design, which is ideally suited to detecting causal relationships if proper controls are used, and quasi-experimental procedures, which are employed when true experimental designs cannot be used, are discussed. Threats to internal validity are presented and hypothetical examples are given to illustrate these threats and the means of controlling them. The importance of utilizing control groups is illustrated.

Designing Experiments

2015 ◽  
pp. 82-96
Keyword(s):  
Experimental Design ◽  
Internal Validity ◽  
Random Selection ◽  
Experimental Designs ◽  
Control Groups ◽  
Test Measurement ◽  
Post Test ◽  
Quasi Experimental ◽  
And Control

In this chapter, students will learn the process of designing experiments. The classic experimental design is presented first. Following this, three distinct quasi-experimental designs are presented. The benefits and burdens of the classic and quasi-experimental designs are discussed in depth. By the end of this chapter, students will understand concepts related to random selection, generalizability, treatment and control groups, pre- and post-test measurement of the dependent variable, and internal validity.

Deliberation and Experimental Design

2018 ◽  
pp. 662-677
Author(s):  
Kevin Esterling
Keyword(s):  
Experimental Design ◽  
Causal Inference ◽  
Observational Data ◽  
Research Design ◽  
Causal Effect ◽  
Internal Validity ◽  
Experimental Designs ◽  
Quasi Experimental ◽  
Methodological Considerations

This chapter describes the methodological considerations necessary for making a causal inference regarding the effect of institutions and group contexts on deliberation. This chapter focuses on the elements of the research design of a study and the assumptions that are necessary to state a causal inference given a particular design; these considerations are applicable to randomized experimental designs, both in the lab and in the field, as well as to quasi-experimental or natural experimental designs using observational data. The chapter shows how to assess the internal validity of a study for identifying a causal effect for a given study and briefly discusses external and epistemic validity considerations that are of particular urgency for empirical deliberation.

PENGARUH MODEL PEMBELAJARAN MARIA MONTESSORI TERHADAP PENGEMBANGAN KEDISIPLINAN ANAK USIA 4-5 TAHUN DI TK ISLAM IBNU QOYYIM KEC. MEDAN SELAYANG

2019 ◽  
Vol 7 (2) ◽  
Author(s):  
Fatma Gustina ◽  
Khadijah Khadijah ◽  
Fauziah Nasution
Keyword(s):  
Hypothesis Testing ◽  
Experimental Research ◽  
Learning Model ◽  
Experimental Designs ◽  
Maria Montessori ◽  
Post Test ◽  
Quasi Experimental ◽  
Group A

<p><em>This research was conducted at TK Islam Ibnu Qoyyim, Medan Selayang District. Tthe type of research is experimental research with uses Quasi Experimental Designs. This study aims to determine the influence of Maria Montessori's learning model on the discipline of children in TK Islam Ibnu Qoyyim. The results showed that the Montessori learning model had an effect on the discipline of group A children. The results of the pretest class were 9.3 and the post-test average was 16.80 with the highest post-test 20 and the lowest post-test 12. Class control with an average pre test 9.7 and the average post test 11.7 with the highest value 16 and the lowest value 7. The results of hypothesis testing obtained t count&gt; t table is 18.31&gt; 2.048 with significant numbers. Thus the hypothesis Ho is rejected and Ha is accepted so that it is stated that there is a Significant Effect of Maria Montessori's Learning Model on the Discipline of Group A Children 4-5 Years Old in the TK Islam Ibnu Qoyyim.</em><em></em></p>

Quasi‐Experimental Research Design

2021 ◽  
pp. 307-310
Author(s):  
Amanda Muse ◽  
Julie Marie Baldwin
Keyword(s):  
Research Design ◽  
Experimental Research ◽  
Quasi Experimental

scholarly journals Speculations on Quasi-Experimental Design in HIV/AIDS Prevention Research

2012 ◽  
Vol 3 (1) ◽  
pp. 52
Author(s):  
Donald T. Campbell ◽  
Beatrice J. Krauss
Keyword(s):  
Experimental Design ◽  
Hiv Prevention ◽  
Research Design ◽  
Research Community ◽  
Experimental Designs ◽  
Prevention Research ◽  
Quasi Experimental ◽  
Aids Research ◽  
Speculative Discussion ◽  
Hiv Aids

This paper provides a speculative discussion on what quasi-experimental designs might be useful in various aspects of HIV/AIDS research. The first author’s expertise is in research design, not HIV, while the second author has been active in HIV prevention research. It is hoped that it may help the HIV/AIDS research community in discovering and inventing an expanded range of possibilities for valid causal inference. DOI:10.2458/azu_jmmss_v3i1_campbell

scholarly journals ‘STORY PYRAMID’: AN INOVATION OF ENGLISH TEACHING STRATEGY IN PROMOTING STUDENTS’ READING SKILL

2020 ◽  
Vol 6 (2) ◽  
pp. 97-103
Author(s):  
Eulis Rahmawati
Keyword(s):  
High School ◽  
Reading Comprehension ◽  
Research Design ◽  
Experimental Research ◽  
Research Finding ◽  
Teaching Strategy ◽  
Reading Skill ◽  
Narrative Text ◽  
English Text ◽  
Quasi Experimental

Some problems are faced by students in reading of English text. The interesting strategy is needed to teach them. Story Pyramid Strategyis one of strategies to teach reading comprehension. This strategy forces students to review and summarize the main points of a story. The research aimed at knowing the effectiveness of using story pyramid strategy in teaching  narrative text toward students’ reading comprehension was conducted in SMAN 1 Serang. The research design of this reseacrh was quasi experimental research with quantitative approach. The  research  finding  showed  that  Story Pyramid  Strategy  is  effective in  teaching  narrative  text  toward  students’ reading comprehension to Senior High School.

Swift Trust in Web Vendors

2011 ◽  
pp. 102-122
Author(s):  
Xin Li ◽  
Guang Rong ◽  
Michelle Carter ◽  
Jason Bennett Thatcher
Keyword(s):  
Research Design ◽  
Experimental Research ◽  
Social Presence ◽  
Third Party ◽  
Effort Expectancy ◽  
Quasi Experimental ◽  
Product Search ◽  
Swift Trust ◽  
And Performance ◽  
Product Search Engines

With the growth of product search engines such as pricegrabber.com, web vendors have many more casual visitors. This research examines how web vendors may foster “swift trust” as a means to convert casual visitors to paying customers. We examine whether perceptions of website’s appearance features (normality, social presence and third-party links) and functionality features (security, privacy, effort expectancy and performance expectancy) positively relate to swift trust in a web vendor. Using a quasi-experimental research design, we empirically test the proposed relationships. Based on an analysis of 224 respondents, we found appearance and functionality features explained 61% of the variance in swift trust. The paper concludes with a discussion of findings and implications.

New highways and land use change: Results from a quasi-experimental research design

2010 ◽  
Vol 44 (2) ◽  
pp. 76-98 ◽  
Author(s):  
Richard G. Funderburg ◽  
Hilary Nixon ◽  
Marlon G. Boarnet ◽  
Gavin Ferguson
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Research Design ◽  
Experimental Research ◽  
Quasi Experimental
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