“Simmons, Nelson, & Simonsohn (2011). False-positive psychology: Undisclosed flexibility in data collection and analysis allows presenting anything as significant.” - Article summary

A false positive refers to an incorrect rejection of the null hypothesis. The decisions a researcher can make during the research process is called the researcher degrees of freedom. Four common degrees of freedom are choosing sample size (1), using covariates (2), choosing among dependent variables (3) and reporting subsets of experimental conditions (4). The researcher degrees of freedom can significantly increase the false positive rate.

There are six guidelines for authors to prevent the increased rate of false positives:

  1. Authors must decide the rule for terminating data collection before data collection begins and report this rule in the article.
  2. Authors must collect at least 20 observations per cell or else provide a compelling cost-of-data collection justification.
  3. Authors must list all variables collected in a study.
  4. Authors must report all experimental conditions, including failed manipulations
  5. If observations are eliminated, authors must also note what the statistical results are if those observations are included.
  6. If an analysis includes a covariate, authors must report the statistical results of analysis without the covariate.

There are four guidelines for reviewers to prevent the increased rate of false positives:

  1. Reviewers should ensure that authors follow the requirements.
  2. Reviewers should be more tolerant of imperfection in results.
  3. Reviewers should require authors to demonstrate that their results do not hinge on arbitrary analytic decisions.
  4. If justifications of data collection or analysis are not compelling, reviewers should require the authors to conduct an exact replication.

 

 

Image

Access: 
Public

Image

Join WorldSupporter!
This content is used in:

Scientific & Statistical Reasoning – Summary interim exam 2 (UNIVERSITY OF AMSTERDAM)

Scientific & Statistical Reasoning – Article summary (UNIVERSITY OF AMSTERDAM)

Search a summary

Image

 

 

Contributions: posts

Help other WorldSupporters with additions, improvements and tips

Add new contribution

CAPTCHA
This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.
Image CAPTCHA
Enter the characters shown in the image.

Image

Spotlight: topics

Check the related and most recent topics and summaries:
Institutions, jobs and organizations:
Activity abroad, study field of working area:
This content is also used in .....

Image

Check how to use summaries on WorldSupporter.org

Online access to all summaries, study notes en practice exams

How and why use WorldSupporter.org for your summaries and study assistance?

  • For free use of many of the summaries and study aids provided or collected by your fellow students.
  • For free use of many of the lecture and study group notes, exam questions and practice questions.
  • For use of all exclusive summaries and study assistance for those who are member with JoHo WorldSupporter with online access
  • For compiling your own materials and contributions with relevant study help
  • For sharing and finding relevant and interesting summaries, documents, notes, blogs, tips, videos, discussions, activities, recipes, side jobs and more.

Using and finding summaries, notes and practice exams on JoHo WorldSupporter

There are several ways to navigate the large amount of summaries, study notes en practice exams on JoHo WorldSupporter.

  1. Use the summaries home pages for your study or field of study
  2. Use the check and search pages for summaries and study aids by field of study, subject or faculty
  3. Use and follow your (study) organization
    • by using your own student organization as a starting point, and continuing to follow it, easily discover which study materials are relevant to you
    • this option is only available through partner organizations
  4. Check or follow authors or other WorldSupporters
  5. Use the menu above each page to go to the main theme pages for summaries
    • Theme pages can be found for international studies as well as Dutch studies

Do you want to share your summaries with JoHo WorldSupporter and its visitors?

Quicklinks to fields of study for summaries and study assistance

Main summaries home pages:

Main study fields:

Main study fields NL:

Follow the author: JesperN
Work for WorldSupporter

Image

JoHo can really use your help!  Check out the various student jobs here that match your studies, improve your competencies, strengthen your CV and contribute to a more tolerant world

Working for JoHo as a student in Leyden

Parttime werken voor JoHo

Statistics
2842