Knowing how effective an intervention, treatment, or manipulation is and increasing replication rates: accuracy in parameter estimation as a partial solution to the replication crisis.
Although basing conclusions on confidence intervals for effect size estimates is preferred over relying on null hypothesis significance testing alone, confidence intervals in psychology are typically very wide. One reason may be a lack of easily applicable methods for planning studies to achieve suf...
| Publicado en: | Psychology & Health Vol. 36; no. 1; pp. 59 - 78 |
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| Autores principales: | , |
| Formato: | computer program tables/charts Journal Article |
| Publicado: |
Taylor & Francis Ltd
Jan2021
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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=148111795&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 148111795 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 08870446 7WK jtl: Psychology & Health issn: 08870446 maglogo: N pubinfo: dt: Jan2021 vid: 36 iid: 1 pid: 377 pub: Taylor & Francis Ltd place: Philadelphia, Pennsylvania artinfo: ui: 148111795 145607247 148111795 148111795 10.1080/08870446.2020.1757098 148111795 ppf: 59 ppct: 19 formats: fmt: – @attributes: type: T – @attributes: type: P tig: atl: Knowing how effective an intervention, treatment, or manipulation is and increasing replication rates: accuracy in parameter estimation as a partial solution to the replication crisis. aug: au: Peters, Gjalt-Jorn Ygram Crutzen, Rik affil: Department of Methodology & Statistics, Faculty of Psychology, Open University of the Netherlands, Heerlen, The Netherlands sug: subj: Research Methodology Replication Studies Precision Evaluation Confidence Intervals Sample Size Pearson's Correlation Coefficient Descriptive Statistics ab: Although basing conclusions on confidence intervals for effect size estimates is preferred over relying on null hypothesis significance testing alone, confidence intervals in psychology are typically very wide. One reason may be a lack of easily applicable methods for planning studies to achieve sufficiently tight confidence intervals. This paper presents tables and freely accessible tools to facilitate planning studies for the desired accuracy in parameter estimation for a common effect size (Cohen's d). In addition, the importance of such accuracy is demonstrated using data from the Reproducibility Project: Psychology (RPP). It is shown that the sampling distribution of Cohen's d is very wide unless sample sizes are considerably larger than what is common in psychology studies. This means that effect size estimates can vary substantially from sample to sample, even with perfect replications. The RPP replications' confidence intervals for Cohen's d have widths of around 1 standard deviation (95% confidence interval from 1.05 to 1.39). Therefore, point estimates obtained in replications are likely to vary substantially from the estimates from earlier studies. The implication is that researchers in psychology -and funders- will have to get used to conducting considerably larger studies if they are to build a strong evidence base. pubtype: Academic Journal doctype: computer program tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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