Abstract

http://ssrn.com/abstract=2256237
 
 

References (50)



 
 

Citations (1)



 


 



P-Curve: A Key to the File Drawer


Uri Simonsohn


University of Pennsylvania - The Wharton School

Leif D. Nelson


University of California, Berkeley - Haas School of Business

Joseph P. Simmons


University of Pennsylvania - The Wharton School; University of Pennsylvania - Operations & Information Management Department

April 24, 2013

Journal of Experimental Psychology: General, Forthcoming

Abstract:     
Because scientists tend to report only studies (publication bias) or analyses (p-hacking) that “work”, readers must ask, “Are these effects true, or do they merely reflect selective reporting?” We introduce p-curve as a way to answer this question. P-curve is the distribution of statistically significant p-values for a set of studies (ps < .05). Because only true effects are expected to generate right-skewed p-curves – containing more low (.01s) than high (.04s) significant p-values – only right-skewed p-curves are diagnostic of evidential value. By telling us whether we can rule out selective reporting as the sole explanation for a set of findings, p-curve offers a solution to the age-old inferential problems caused by file-drawers of failed studies and analyses.

Number of Pages in PDF File: 14

Keywords: p-hacking, publication bias, file drawer, science, statistics, judgment, decision making

Accepted Paper Series


Download This Paper

Date posted: April 24, 2013 ; Last revised: July 8, 2014

Suggested Citation

Simonsohn, Uri and Nelson, Leif D. and Simmons, Joseph P., P-Curve: A Key to the File Drawer (April 24, 2013). Journal of Experimental Psychology: General, Forthcoming. Available at SSRN: http://ssrn.com/abstract=2256237

Contact Information

Uri Simonsohn (Contact Author)
University of Pennsylvania - The Wharton School ( email )
3730 Walnut Street
JMHH 500
Philadelphia, PA 19104-6365
United States
Leif D. Nelson
University of California, Berkeley - Haas School of Business ( email )
545 Student Services Building
Berkeley, CA 94720
United States
Joseph P. Simmons
University of Pennsylvania - The Wharton School ( email )
3733 Spruce Street
Philadelphia, PA 19104-6374
United States
University of Pennsylvania - Operations & Information Management Department ( email )
Jon M. Huntsman Hall
3730 Walnut Street
Philadelphia, PA 19104
United States
HOME PAGE: http://opimweb.wharton.upenn.edu/people/faculty.cfm?id=1666

Feedback to SSRN


Paper statistics
Abstract Views: 8,507
Downloads: 2,490
Download Rank: 2,360
References:  50
Citations:  1
Paper comments
No comments have been made on this paper

© 2014 Social Science Electronic Publishing, Inc. All Rights Reserved.  FAQ   Terms of Use   Privacy Policy   Copyright   Contact Us
This page was processed by apollo4 in 0.282 seconds