Craig A. Wendorf, Ph.D. Department of Psychology

Statistics Projects and Resources

Statistics for Psychologists: An Online Textbook

My Online Stats Book

The materials in this online textbook are intended to facilitate the connection between standard introductory statistics concepts and their implementation in statistical software. The textbook currently includes: a summary of basic statistical methods; instructions on obtaining basic statistical output using SPSS, jamovi, and JASP; annotated output showing how to calculate and interpret the output; and summaries of how the results should be reported in APA style.

  • Wendorf, C. A. (2009). Statistics for Psychologists: An online textbook. Available via the Open Science Framework at osf.io/qe5ym. [View] [Download]

Estimation Approach to Statistics with Excel (EASE)

Estimation Approach to Statistics with Excel

EASE is a set of fast and easy spreadsheets that calculate confidence intervals for means and standardized effect sizes, the later of which are not available in more elaborate commercially available statistical software. [ARISE is a fork of my EASE project. ARISE spreadsheets calculate both relational and arelational confidence intervals for means.] Separate spreadsheets are available for different designs (between-subjects vs. within-subjects) and data input type (raw data vs. descriptive statistics). All sheets are updated regularly.

  • Wendorf, C. A. (2016). An Estimation Approach to Statistics with Excel (EASE). Software available via the Open Science Framework at osf.io/vw2gg. [Download]
  • Wendorf, C. A. (2016). Arelational and Relational Interval Statistics with Excel (ARISE). Software available via the Open Science Framework at osf.io/sjtd9. [Download]

Embedded Assessment and Analysis

Embedded Assessment and Analysis

There is a close tie between statistical methodology and embedded assessment of learning outcomes. The document and tool below offer a strategy for embedding assessment of learning outcomes into the existing graded assignments for a course. Taken together, these resources provide a simple -- yet quite effective -- system that can be used in any course.

  • A Methodology for Embedded Assessment: This document describes how a repeated measures research design is appropriate to embedded assessment, yet describes the difference in analytical strategy. [PDF]
  • Grading and Embedded Assessment Tool (GREAT): This spreadsheet provides simple analyses and graphs for reporting repeated measures embedded assessments. [XLSX]
  • Office Location:
    D240 Science
  • Office Phone:
    715-346-2304
  • Office Email:
    cwendorf@uwsp.edu