About Karen Grace-Martin, MA

Karen Grace-Martin

Karen Grace-Martin, the founder and president of The Analysis Factor, is a professional statistical consultant with Masters degrees in both applied statistics and social psychology.

Her career started in psychology research, where her frustration in applying statistics to her data led her to learn more statistics.  She soon realized that her favorite part of research was data analysis, leading to a career change.  Her background in experimental research and working with real data has been invaluable in understanding the challenges that researchers face in using statistics.

Karen was a professional statistical consultant at Cornell University for seven years before founding The Analysis Factor.  Karen has worked with clients from undergraduate honors students on their first research project to tenured Ivy League professors, as well as non-profits and businesses. Her ability to understand what researchers need and to explain technical information at the level of the researcher’s understanding has been one of her strongest assets as a consultant. She treats all clients with respect, and derives genuine satisfaction from the relief she hears in their voices when they realize that someone can help them.

Before consulting, Karen taught statistics courses for economics, psychology, and sociology majors at the University of California, Santa Barbara and Santa Barbara City College.  She has co-written an introductory statistics textbook with Stephen Sweet: Data Analysis with SPSS*.  Karen has developed and presented many statistics workshops, most recently on missing data, logistic regression, and interpreting regression parameters.

*The Book

Data Analysis with SPSS
(4th Edition)
by Stephen Sweet and Karen Grace-Martin

The Craft of Statistical Analysis Webinars

All of these were taught by Karen and access to all recordings are available at no charge.

Karen’s Workshops

repeated measures
Analyzing Repeated Measures Data: ANOVA and Mixed Model Approaches
Level: Advanced
Software Used: SPSS, SAS, R, Stata
Interpreting (Even Tricky) Regression Coefficients
Level: Intermediate
Software Used: SPSS, SAS, R, Stata
logistic regression
Logistic Regression for Binary, Ordinal, and Multinomial Outcomes
Level: Advanced
Software Used: SPSS, SAS, R, Stata
Principal Component and Exploratory Factor Analysis
Level: Advanced
Software Used: SPSS, SAS, R, Stata


Todd JT, Stuart A, Lintzenich CR, Wallin J, Grace-Martin K, Butler SG. 2013. Stability of aspiration status in healthy adults. Ann Otol Rhinol Laryngol, 122(5):289-93.

Lester S, Langmore SE, Lintzenich CR, Wright SC, Grace-Martin K, Fife T, Butler SG. 2013. The effects of topical anesthetic on swallowing during nasoendoscopy. Laryngoscope, 123(7):1704-8. doi: 10.1002/lary.23899. Epub 2013 Apr 2.

Todd JT, Butler SG, Plonk DP, Grace-Martin K, Pelletier CA. 2012. Effects of chemesthetic stimuli mixtures with barium on swallowing apnea duration. Laryngoscope, 122(10):2248-51. doi: 10.1002/lary.23511. Epub 2012 Sep 7.

Todd JT, Butler SG, Plonk DP, Grace-Martin K, Pelletier CA. 2012. Main taste effects on swallowing apnea duration in healthy adults. Otolaryngol Head Neck Surg, 147(4):678-83. Epub 2012 Jun 7.

Plonk DP, Butler SG, Grace-Martin K, Pelletier CA. 2011. Effects of chemesthetic stimuli, age, and genetic taste groups on swallowing apnea duration. Otolaryngol Head Neck Surg,145(4):618-22. doi: 10.1177/0194599811407280. Epub 2011 Apr 26.

Drew P. Plonk, MD, Susan G. Butler, PhD, Karen Grace-Martin, MA, and Cathy A. Pelletier, PhD3. 2011. Effects of Chemesthetic Stimuli, Age, and Genetic Taste Groups on Swallowing Apnea Duration. Otolaryngology–Head and Neck Surgery 145(4) 618-622.

Steele CM, Bailey GL, Molfenter SM, Yeates EM, Grace-Martin K. 2010. Pressure profile similarities between tongue resistance training tasks and liquid swallows. J Rehabil Res Dev, 47(7):651-60.

Sweet, Stephen A. and Karen Grace-Martin. 2008. Data Analysis with SPSS, 4th Ed.  Pearson Education.

Hutchens, Robert M. and Karen Grace-Martin.  2004.  “Employer Willingness to Permit Phased Retirement:  Why are Some More Willing Than Others?”  Industrial & Labor Relations Review, 59(4): 525-46.

Chang, Yao-Chien, Karen Grace-Martin, & William B. Miller.  2004. Efficacy of Exogenous Applications for Reducing Upper Leaf Necrosis in Lilium ‘Star Gazer.’  HortScience, 39(2), 272-275.

Frongillo, Edward, Cara Olsen, Francoise Vermeylen, & Karen Grace-Martin (2000).  A Taxonomy of Statistical Services: Organizing a University Statistical Consulting Office.  Presented at the Joint Statistical Meetings, Indianapolis, IN.