Claudia Krenz, Ph.D. (datafriend @ gmail-.-com)
Portland, OR, USA


Overview: Over two decades of experience communicating technical information--in person, in writing, and online--to lay and professional audiences in the diverse areas of medicine, education, social policy, the arts, and the environment. Over a decade of applied results-oriented research experience in data auditing, management, and analysis--including large, complex repeated-measures datasets--and survey development.


Web .02 Pages (primarily about quantitative data analyses)

(last update = 2007). The Bell Curve: Anatomy of an Analysis. A reanalysis of the statistics used in the book so titled (Methods and Results: Appendix 4, pp. 593-604 and p. 622; Interpretation: Chapter 5, p. 127). My results replicated those published in the book; my examination of the analysis' residuals show the model predicted 0% of its cases of interest correctly and so no interpretation of the published results is warranted (rather than publishing these results in a traditional journal, I posted them for anyone to read). The tables have been online since 1998: I've updated insofar as eliminating "link rot." Following the process of scholarly citation, listed in a number of print books and online discussions about statistical methodology and the nature of "intelligence."

(2007). Littering the Information Superhighway. Simple case-study experiment showing that different "unique" ID#s are attached to the same user/machine after "cookie" deletion. Discusses implications of "data mining." Shows actual cookie values from Wired's online news page viewed with Netscape 4.7 on both a Performa and an original-issue Ibook.

(2007). U.S. Medical Search Engines. Single-page interface to .gov medical search engines. Engine list interface developed for personal use while working on an NIH-funded grant and subsequently posted for public use. It was useful for its time.

(2007). No Aggregated Test Scores Left Behind: Grading the State of U.S. Educational Reform. Empirical examination of the relationship between standards-based implementation and student achievement. Raw data are shown as are correlations between the 1998 State grades published online in a Education Week on the Web's Special "Report Cards" Section and the percentages of 4th and 8th graders scoring proficient on the then venerable National Assessment of Educational Progress Math Test. Results showed large statistically significant negative correlation between implementation of standards-based achievement testing and student achievement. Several interpretations of these results are discussed.

(2007). Alaska's High School Exit Exam. Annotated bibliography describes the period between 1998 and 2003--when Alaska's "High School Graduation Qualifying Exam" (HSGQE) was developed, field tested, and first used as a diploma sanctioning test. As noted by CTB/McGraw-Hill, Alaska's initial test publisher, in the process of flaming me, "covers the entire [testing] process from development to data acquisition and reporting." Raises questions about collecting U.S. public K-12 student data under NCLB's PBDMI/EDEN initiatives.

(2006). A Multimedia Virtual Case Study of the Experience of an Exploding Volcano This for-fun site chronicles my first volcanic eruption.

(2005) Philip K. Dick Words Project. Outlines my proposal for digitally sharing the content of my correspondence with the author--beginning in 1974 and concluding in 1981--with the world. Proposal details hermeneutically sound procedures for preserving the integrity of the author's created works while simultaneously setting the bar for access low. The project didn't happen, because it would have violated U.S. copyright law. Page also provides letters of provenance for purchasers of original letters and discusses differences between the originals and the Underwood-Miller print versions published in the 1990s.

(2004) One Line of Perl (a quantitative chronicle of my attempts to outsource my professional self). I'm not a PERL programmer, merely an enthusiast.

(2000). Looking for Ubik at AltaVista. A philosophical reflection of this conversation originally published at an enthusiast site (honored to be listed among the pages that please my browser).


Print: Scientific Journals and Conferences (most available via subscription only)

(publication date = 1996). Vitaliano, P., Scanlan, J. M., Krenz, C., Schwartz. R.S., and Marcovina, S.M. Psychological Distress Mediates Relationships between Caregiving and Metabolic Variables. Journal of Gerontology: Psychological Sciences, 51B, 290-99 [see National Library of Medicine abstract].

(1996). Vitaliano, P., Scanlan, J. M., Krenz, C., and Fujimoto, W. Insulin and Glucose: Relationship with Hassles, Anger, and Hostility in Non-Diabetic Older Adults. Psychosomatic Medicine, 58, 489-99 [see NLM abstract].

(1993). Catalano, R.F., Hawkins, J.D., Krenz, C., Gillmore, M. Morrison, D., Wells, E., & Abbott, R. Using Research to Guide Culturally Appropriate Drug Abuse Prevention. Journal of Consulting and Clinical Psychology, 61, 804-11. Final chapter in Addictive Behaviors, Marlatt & VandenBos, Ed. 1997. For sale at the usual sites [see NLM abstract ].

(1991). Hawkins, J. D., Catalano, R., Krenz, C., Day, E. L., & O'Donnell, J. The Effects of Parent and Teacher Training on Drug Use and Delinquency at Grades 6 and 7. Paper presented at the Biennial Meeting of the Society for Research in Child Development, Seattle, WA.*

(1988). Krenz, C., Larson, E., Buchner, D., & Canfield, C. Characterizing Patient Dysfunction in Alzheimer's Type Dementia. Medical Care, 26, 453-61 [see NLM abstract].

(1987). Krenz, C. Measurement Issues in Human-Computer Interaction. Paper presented at the 13th Annual University of Washington Computer Fair: Making Computers Usable Panel, Seattle, WA.*

(1987). Krenz, C., & Sax, G. Acquiescence as a Function of Test Type and Subject Uncertainty. Educational and Psychological Measurement, 47, 575-81 [see Sage abstract].

(1986). Krenz, C. Methods of Evaluating C.A.I. Paper presented at the 7th Annual Instructional Computing Conference, Crystal Mountain Resort, WA.*

(1986). Krenz, C., & Sax. G. What Quantitative Research Is and Why It Doesn't Work. American Behavioral Scientist, 30, 58-69.

* conference papers.


Book Summaries and Introductions

(2007). Krenz, C. Summary, Freedom From Fear and Other Writings (1991). By Aung San Suu Kyi. Penguin Books (summary turned over to Wikipedia for improvement).

(2004). Krenz, C. Introduction, Critique of Pure Reason (1788). By Immanuel Kant. Barnes & Noble e-books.



Ph.D., Educational Testing and Measurement, U. Washington, Seattle, WA (1988)
   Dissertation. The Impact of Skew on Type I Error Rates (Fortran simulation generated 9 factorially different non-normal populations of 20,000 scores, drew 10,000 samples (N=5), computed one-sample z-statistics, and counted the number of decisions resulting in Type I errors: analyzed data with a two-way analysis of variance computed, for fun, on a hand calculator);
Ph.C., Mass Communication, U. Washington, Seattle, WA (1984);
M.A., Technical Communication, U. Montana, Missoula, MT (1980);
   Thesis. Responses to Quantification by Technical and Lay Readers;
M.A., English, Idaho State U., Pocatello, ID (1975);
   Thesis. The Splintered Shards: Reality and Illusion in the Novels of Philip K. Dick;
B.A., English, Idaho State U., Pocatello, ID (1973).


Selected projects


(1991 to 93) St.Olaf College, Northfield, MN. Aided successful reaccreditation effort: Coordinated and consolidated administrative and department-level academic data for required institutional self-study. Conducted data analyses supporting administrative processes like retention and tenure; monitored demographic trends; sat on committees like Human Subjects.

(1991, 92) Committee for the Prevention of Sexual and Domestic Violence. Evaluated the effectiveness of clergy-ethics training sessions: developed tests by content analyzing project objectives; analyzed data from pre- and post-tests administered by organizational staff; reported results.

(1988, 89, 90) Committee for Children. Provided analytic support to project whose goal was a demonstrably effective abuse-prevention curriculum: analyzed pre- and post-test scores; discussed results; provided metadata.

(1989) Curriculum and Instruction, U. Washington. Assisted author revising statistical text, provided camera-ready copy of computational procedures and solutions to selected problems organized in a self-explanatory manner.

(1988) City U, Bellevue, WA. Designed educational outcome measures for business courses by content analyzing their instructional objectives; quantified assumptions to estimate costs of department-wide testing; presented and discussed results with faculty.

(1985) Academic Computing Services, U. Washington. Developed minimum competency performance-based computer skills test; proposed digital data-collection procedures approved by internal Human Subjects committee; conducted randomized experiment to evaluate mainframe computer manuals' instructional effectiveness; authored online learning modules implemented institution-wide. Later hosted human-computer interaction series at regional computer fair.

(1982 to 83) School of Communications, U. Washington. Developed curriculum and workbook presenting techniques for evaluating technical information; emphasized retrieval and evaluation skills.


(1995 to 97, 84 to 85) Psychiatry and Behavioral Sciences, U. Washington. Created analysis files for study of chronic stress on the psychosocial and physiological condition of Alzheimer-patients' spouse caregivers: Merged data across directories from different collection points and sources, both scientific and administrative databases; computed new variables by aggregating and assigning factor scores; met with research group and performed ad hoc data queries using regression, cluster, discriminant, and latent-variable analyses. Had earlier coded data.

(1988 to 90, 86 to 87) School of Dentistry, U. Washington. Conducted statistical analyses culminating in an improved state licensure examination: Investigated the psychometric adequacy of two test administrations; inverted flat databases to made examiners, not examinees, the unit of analysis; ported data across platforms; provided documentation or metadata in paper and digital formats. Explained results in confidential statistical report to University and State officials, formally responding to questions and rebuttals. Later met with committee charged with improving the exam.

(1987) Veteran's Administration, American Lake, WA. Formally evaluated regional teaching nursing home using grant objectives as basis for qualitative analysis; aggregated these results; reported findings and provided metadata for project report appendix.

(1985) College of Medicine, U. Washington. Resolved relational database management key problem in Alzheimer's study; cross validated quantitative patient-function tests; extrapolated from sample to population.

(1982 to 83) Communications Research Center, U. Washington. Wrote training manuals for study of cancer patients' questions; supervised interviewers; developed qualitative templates for interview data.

the Arts

(1987, 90, 94, 97, 2002) Music Department, Pacific Lutheran U, Tacoma, WA. Provided qualitative summary of alumni survey data. Statistically examined the relative effect of variables like meter on the rhythmic accuracy of experienced musicians: estimated three-way interactions (database too big for computers of its time to fully specify or segment); ported data from one obsolete mainframe to another; reanalyzed data using new variable definitions--in a computing environment powerful enough to fully specify model!

(1979 to 80) Interpersonal Communication, U. Montana, Missoula, MT. Used hands-on demonstrations and simulations to teach undergraduate skills courses in dyadic communication and public speaking.

(1973 to 75) English Department, Idaho State U., Pocatello, ID. Designed and taught beginning and intermediate writing courses; helped students analyze their prose, in the world before word processors.

the Environment and applied research

(1985 to present) Data analysis consulting. Intermittent and continual: Help clients answer their questions, quantitative and qualitative, institutional and individual, longitudinal and cross-sectional. Data auditing, management, and analysis (including complex repeated-measures databases); program evaluation, test construction (traditional and performance-based); grant and technical writing and editing; as well as literature reviews, custom searching, abstracting, and summarizing.

(1993 to 94) Human Ecology, Cornell U., Ithaca, NY. Developed more authentic skills-based assessments to study the impact of training on case workers' subsequent problem-solving behaviors. Fixed metadata problems found when auditing legacy database; lead team developing information system to meet instructional and administrative needs. Conducted analyses; synthesized and presented results in specialized quarterly and annual accountability reports to funding agency.

(1989, 90 to 91) Social Work, U. Washington. Used regression analyses to identify cases likely to later engage in substance abuse; examination of the residuals of both the main and interactive effects of the different sociological and psychological predictors revealed culturally distinct initiation patterns. Resolved measurement problems occasioned by working with large, messy databases; articulated project metadata guidelines.

(1986) Seattle Water Department. Showed how suppressor variable explained anomaly in regression model, i.e., that having a swimming pool was a positive predictor of reduced water consumption. Proposed remedies.

(1985 to 89, 91) Educational Psychology, U. Washington. Tailored materials for adult learners from diverse disciplinary and math backgrounds. Provided examples, used practical scenarios to explain, and answered questions about standardized testing, measurement issues, and descriptive and inferential statistics through regression and analysis of variance. Had students apply course content by preparing research proposals in their own interest areas.

(1978) Ecology Consultants, Fort Collins, CO. Advised firm of clients' needs and recommended procedures for achieving them. Developed writing manual distributed to team members throughout the country.

(1976 to 77) Environmental Impact Analysis Program, US Geological Survey, Pocatello, ID; Grand Junction, CO. Helped scientists turn environmental impact statements into decision documents. Selected to study under national editor. Developed preparation guidelines for nationally-distributed interagency training module.