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The suitability of external control-groups for empirical control purposes: a cautionary story in science education research

Title data

Scharfenberg, Franz-Josef ; Bogner, Franz X. ; Klautke, Siegfried:
The suitability of external control-groups for empirical control purposes: a cautionary story in science education research.
In: Electronic Journal of Science Education. Vol. 11 (2006) Issue 1 . - pp. 22-36.
ISSN 1087-3430

Abstract in another language

This article deals with a specific effect in one external control group incorporated to account for any pretest bias in a more comprehensive cognitive achievement study in a gene technology lab (as part of a modified Solomon’s four-group plan). We monitored 12th graders (N = 117) in two external groups without any intervention: a one-test group (n = 55) and a three-test group (n = 62). Both samples participated in identical tests which quantified the relevant knowledge of the lesson unit applied in the main study. The three-test group yielded an unexpected increase in achievement scores. Subsequent analysis revealed two subsamples: one with no changes, the other with an increase (although without an intervention took place). A likely reason for the latter situation may lie in the role of the teacher(s) involved who might have wish to avoid potential negative results in his/her class. Consequently, we recommend the application of a modified Solomon’s four group plan in science education research in order to prevent the influence of teacher intervention in future empirical analyses.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER43296
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Didactics of Biology
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Didactics of Biology > Chair Didactics of Biology - Univ.-Prof. Dr. Franz Xaver Bogner
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 15 May 2015 14:47
Last Modified: 15 May 2015 14:47
URI: https://eref.uni-bayreuth.de/id/eprint/13773