Effectiveness of Adjuvant Fluorouracil in Elderly Colon Cancer Patients: The Internal and External Validity of Nonrandomized Research Design

<p>We are pleased to present a new issue of AJET and in the editorial we would like to discuss some of the challenges involved in undertaking and reporting on experimental research in education and in educational technology specifically. The first challenge relates to the need to find the right balance between internal and external validity in the research design, while the second relates to the need for clarity about the likely causes of learning effects: technology or learning design.</p>

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8. Experimental Research

10.1093/hepl/9780198702740.003.0008 ◽

2017 ◽

Author(s):

Sandra Halperin ◽

Oliver Heath

Keyword(s):

Experimental Design ◽

Research Design ◽

Experimental Research ◽

External Validity ◽

Laboratory Experiments ◽

Field Experiments ◽

Ethical Issues ◽

Natural Experiments ◽

The Common ◽

Internal And External Validity

This chapter explores the principles of experimental research design as well as the issues and problems associated with different aspects of the approach. In particular, it considers the issue of internal and external validity, the common obstacles associated with experimental research, and what can be done to try and avoid or minimize them. The chapter first describes the five steps involved in the classic version of the experimental design before discussing three types of experimental design: laboratory experiments, field experiments, and natural experiments. It also examines the ethical issues that arise from experimental research and concludes by highlighting some of the advantages of experimental research.

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An RCT of massage therapy to improve pain and mood in advanced cancer patients: can we have both internal and external validity?

Focus on Alternative and Complementary Therapies ◽

10.1111/j.2042-7166.2009.tb01874.x ◽

2009 ◽

Vol 14 (1) ◽

pp. 45-46

Keyword(s):

Cancer Patients ◽

Advanced Cancer ◽

External Validity ◽

Massage Therapy ◽

Advanced Cancer Patients ◽

Internal And External Validity

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Validity of energy social research during and after COVID-19: challenges, considerations, and responses

10.31235/osf.io/pe6cd ◽

2020 ◽

Author(s):

Michael James Fell ◽

Laura Pagel ◽

Chien-fei Chen ◽

Matthew H. Goldberg ◽

Mario Herberz ◽

...

Keyword(s):

Research Design ◽

External Validity ◽

Social Research ◽

Good Practice ◽

Special Consideration ◽

Contextual Data ◽

The World ◽

Energy Domain ◽

To Come ◽

Internal And External Validity

Measures to control the spread of coronavirus disease 2019 (COVID-19) are having unprecedented impacts on people’s lives around the world. In this paper, we argue that those conducting social research in the energy domain should give special consideration to the internal and external validity of their work conducted during this pandemic period. We set out a number of principles that researchers can consider to give themselves and research users greater confidence that findings and recommendations will still be applicable in years to come. Largely grounded in existing good practice guidance, our recommendations include collecting and reporting additional supporting contextual data, reviewing aspects of research design for vulnerability to validity challenges, and building in longitudinal elements where feasible. We suggest that these approaches also bring a number of opportunities to generate new insights. However, we caution that a more systemic challenge to validity of knowledge produced during this period may result from changes in the kinds of social research that it is practicable to pursue.

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8. Experimental Research

Political Research ◽

10.1093/hepl/9780198820628.003.0008 ◽

2020 ◽

pp. 211-230

Author(s):

Sandra Halperin ◽

Oliver Heath

Keyword(s):

Experimental Design ◽

Research Design ◽

Experimental Research ◽

External Validity ◽

Laboratory Experiments ◽

Field Experiments ◽

Ethical Issues ◽

Natural Experiments ◽

The Common ◽

Internal And External Validity

This chapter explores the principles of experimental research design as well as the issues and problems associated with different aspects of the approach. In particular, it considers the issue of internal and external validity, the common obstacles associated with experimental research, and what can be done to try and avoid or minimize them. The chapter first describes the five steps involved in the classic version of the experimental design before discussing three types of experimental design: laboratory experiments, field experiments, and natural experiments. It also examines the ethical issues that arise from experimental research and concludes by highlighting some of the advantages of experimental research.

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The German Post-Critical Belief Scale: Internal and External Validity

Zeitschrift für Sozialpsychologie ◽

10.1024/0044-3514.34.4.219 ◽

2003 ◽

Vol 34 (4) ◽

pp. 219-226 ◽

Cited By ~ 7

Author(s):

Bart Duriez ◽

Claudia Appel ◽

Dirk Hutsebaut

Keyword(s):

Internal Structure ◽

Present Article ◽

External Validity ◽

German Version ◽

Dutch Version ◽

German Sample ◽

Belief Scale ◽

Internal And External Validity

Abstract: Recently, Duriez, Fontaine and Hutsebaut (2000) and Fontaine, Duriez, Luyten and Hutsebaut (2003) constructed the Post-Critical Belief Scale in order to measure the two religiosity dimensions along which Wulff (1991 , 1997 ) summarized the various possible approaches to religion: Exclusion vs. Inclusion of Transcendence and Literal vs. Symbolic. In the present article, the German version of this scale is presented. Results obtained in a heterogeneous German sample (N = 216) suggest that the internal structure of the German version fits the internal structure of the original Dutch version. Moreover, the observed relation between the Literal vs. Symbolic dimension and racism, which was in line with previous studies ( Duriez, in press ), supports the external validity of the German version.

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