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--- abstract: 'I describe and question the argument that in psychological research, the significance test should be replaced (or, at least, supplemented) by a more informative index (viz., effect size or statistical power) in the case of theory-corroboration experimentation because it has been made on the basis of some debatable assumptions about the rationale of scientific investigation. The rationale of theory-corroboration experimentation requires nothing more than a binary decision about the relation between two variables. This binary decision supplies the minor premise for the syllogism implicated when a theory is being tested. Some metatheoretical considerations reveal that the magnitude of the effect-size estimate is not a satisfactory alternative to the significance test.' altloc: - http://uregina.ca/~chowsl/pub_papers/SIGTEST.htm chapter: ~ commentary: ~ commref: ~ confdates: ~ conference: ~ confloc: ~ contact_email: ~ creators_id: [] creators_name: - family: Chow given: Siu L. honourific: '' lineage: '' date: 1988 date_type: published datestamp: 1999-08-07 department: ~ dir: disk0/00/00/08/24 edit_lock_since: ~ edit_lock_until: ~ edit_lock_user: ~ editors_id: [] editors_name: [] eprint_status: archive eprintid: 824 fileinfo: /style/images/fileicons/text_html.png;/824/1/SIGTEST.htm full_text_status: public importid: ~ institution: ~ isbn: ~ ispublished: pub issn: ~ item_issues_comment: [] item_issues_count: 0 item_issues_description: [] item_issues_id: [] item_issues_reported_by: [] item_issues_resolved_by: [] item_issues_status: [] item_issues_timestamp: [] item_issues_type: [] keywords: 'statistical significance, effect size, statistical power, meta-analysis, modus tollens, the sample-size problem, theeffect-size problem, the substantive-significance problem, theory corroboration' lastmod: 2011-03-11 08:54:18 latitude: ~ longitude: ~ metadata_visibility: show note: ~ number: 1 pagerange: 105-110 pubdom: FALSE publication: Psychological Bulletin publisher: ~ refereed: TRUE referencetext: ~ relation_type: [] relation_uri: [] reportno: ~ rev_number: 8 series: ~ source: ~ status_changed: 2007-09-12 16:34:51 subjects: - cog-psy - phil-sci succeeds: ~ suggestions: ~ sword_depositor: ~ sword_slug: ~ thesistype: ~ title: Significance Test or Effect Size? type: journalp userid: 141 volume: 103