Qualitative research series. How to detect effects: statistical power and evidence-based practice in occupational therapy research.
The findings from 30 research investigations examining the effectiveness of occupational therapy interventions were reviewed and analyzed. The statistical conclusion validity was determined by computing post hoc power coefficients for the statistical hypothesis tests included in the examined studies...
| Publicado en: | American Journal of Occupational Therapy Vol. 53; no. 2; pp. 181 - 189 |
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| Autores principales: | , |
| Formato: | tables/charts Journal Article |
| Publicado: |
American Occupational Therapy Association
Mar/Apr1999
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=107194574&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 107194574 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 02729490 44I jtl: American Journal of Occupational Therapy issn: 02729490 maglogo: N pubinfo: dt: Mar/Apr1999 vid: 53 iid: 2 pid: 6680 pub: American Occupational Therapy Association place: North Bethesda, Maryland artinfo: ui: 107194574 107194574 86055300 1999040872 10.5014/ajot.53.2.181 NLM10200841 107194574 ppf: 181 ppct: 8 formats: fmt: – @attributes: type: T – @attributes: type: P tig: atl: Qualitative research series. How to detect effects: statistical power and evidence-based practice in occupational therapy research. aug: au: Ottenbacher KJ Maas F affil: School of Allied Health Sciences, University of Texas Medical Branch, 301 University Boulevard, Galveston, Texas 77555-1028, kottenba@utmb.edu sug: subj: Research, Occupational Therapy Professional Practice, Research-Based Power Analysis Probability Statistics Funding Source ab: The findings from 30 research investigations examining the effectiveness of occupational therapy interventions were reviewed and analyzed. The statistical conclusion validity was determined by computing post hoc power coefficients for the statistical hypothesis tests included in the examined studies. Data analysis revealed the median power values to detect small, medium, and large effect sizes were .09, .33, and .66, respectively. These results suggest a high probability of Type II errors in the sample of occupational therapy intervention research examined. In practical terms, this means the intervention produced a potentially useful treatment effect, but the effect was not detected as significant. Examples are provided that illustrate how low statistical power contributes to increases in Type II errors and inhibits the development of consensus through replication in the research literature. The presence of low-power studies with high rates of false negative findings prevents the establishment of guidelines for evidence-based practice and impedes the scientific progress of rehabilitation professions such as occupational therapy. pubtype: Academic Journal doctype: tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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