词条 | Researcher degrees of freedom |
释义 |
Though the concept of researcher degrees of freedom has mainly been discussed in the context of psychology, it can affect any scientific discipline.[1] Like publication bias, the existence of researcher degrees of freedom has the potential to lead to an inflated degree of funnel plot asymmetry.[3] Furthermore, studies with smaller sample sizes are more susceptible to the biasing influence of researcher degrees of freedom.[4] ExamplesWicherts et al. (2016) provided a list of 34 degrees of freedom (DFs) researchers have when conducting psychological research. The DFs listed span every stage of the research process, from formulating a hypothesis to the reporting of results. They include conducting exploratory, hypothesis-free research, which the authors note "...pervades many of the researcher DFs that we describe below in the later phases of the study." Other DFs listed in this paper include the creation of multiple manipulated independent variables and the measurement of additional variables that may be selected for analysis later on.[2] References1. ^1 2 {{Cite journal |last=Simmons |first=Joseph P. |last2=Nelson |first2=Leif D. |last3=Simonsohn |first3=Uri |date=November 2011 |title=False-Positive Psychology: Undisclosed Flexibility in Data Collection and Analysis Allows Presenting Anything as Significant |url=http://journals.sagepub.com/doi/10.1177/0956797611417632 |journal=Psychological Science |language=en |volume=22 |issue=11 |pages=1359–1366 |doi=10.1177/0956797611417632 |issn=0956-7976}} {{Statistics-stub}}2. ^1 {{Cite journal |last=Wicherts |first=Jelte M. |last2=Veldkamp |first2=Coosje L. S. |last3=Augusteijn |first3=Hilde E. M. |last4=Bakker |first4=Marjan |last5=van Aert |first5=Robbie C. M. |last6=van Assen |first6=Marcel A. L. M. |date=2016-11-25 |title=Degrees of Freedom in Planning, Running, Analyzing, and Reporting Psychological Studies: A Checklist to Avoid p-Hacking |url=http://journal.frontiersin.org/article/10.3389/fpsyg.2016.01832/full |journal=Frontiers in Psychology |volume=7 |doi=10.3389/fpsyg.2016.01832 |issn=1664-1078 |pmc=5122713 |pmid=27933012}} 3. ^{{Cite journal |last=Carter |first=Evan C. |last2=McCullough |first2=Michael E. |date=2014-07-30 |title=Publication bias and the limited strength model of self-control: has the evidence for ego depletion been overestimated? |url=http://journal.frontiersin.org/article/10.3389/fpsyg.2014.00823/abstract |journal=Frontiers in Psychology |volume=5 |doi=10.3389/fpsyg.2014.00823 |issn=1664-1078 |pmc=4115664 |pmid=25126083}} 4. ^{{Cite journal |last=Schweizer |first=Geoffrey |last2=Furley |first2=Philip |date=March 2016 |title=Reproducible research in sport and exercise psychology: The role of sample sizes |url=https://linkinghub.elsevier.com/retrieve/pii/S1469029215300273 |journal=Psychology of Sport and Exercise |language=en |volume=23 |pages=114–122 |doi=10.1016/j.psychsport.2015.11.005}} 2 : Bias|Academic publishing |
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