Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Transformations for within-subject designs: a Monte Carlo investigation

L K Bush1, U Hess, G Wolford

  • 1Department of Psychology and Counseling, Dartmouth College, Hanover, New Hampshire 03755.

Psychological Bulletin
|May 1, 1993
PubMed
Summary

Transformations like Z-scores and range correction significantly boost statistical power in within-subject designs, outperforming simple averaging for reaction time and psychophysiological data.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Liver Assessment in Patients with Ataxia-Telangiectasia: Transient Elastography Detects Early Stages of Steatosis and Fibrosis.

Canadian journal of gastroenterology & hepatology·2023
Same author

Autologous hematopoietic stem cell transplantation for intravascular large B-cell lymphoma: the European Society for Blood and Marrow Transplantation experience.

Bone marrow transplantation·2016
Same author

Comparison of three or fewer high-dose chemotherapy cycles as salvage treatment in germ cell tumors in first relapse.

Bone marrow transplantation·2016
Same author

Secondary malignancies in chronic myeloid leukemia patients after imatinib-based treatment: long-term observation in CML Study IV.

Leukemia·2016
Same author

Evidence that short-term memory is not the limiting factor in the tachistoscopic full-report procedure.

Memory & cognition·2013
Same author

Integrating novel agents into multiple myeloma treatment - current status in Switzerland and treatment recommendations.

Swiss medical weekly·2010

Area of Science:

  • Psychology
  • Statistics
  • Experimental Design

Background:

  • Within-subject designs often collect multiple measures per participant per condition.
  • Averaging these measures is common but may not optimize statistical power.
  • Alternative data transformations exist but their impact on error rates is less understood.

Purpose of the Study:

  • To evaluate the effectiveness of various data transformations in enhancing statistical power for within-subject designs.
  • To compare the influence of transformations on Type I and Type II error probabilities.
  • To identify optimal transformations for different data distributions, including skewed data.

Main Methods:

  • Utilized Monte Carlo simulations to rigorously assess transformation effects.

Related Experiment Videos

  • Compared simple averaging against Z-score and range correction transformations.
  • Investigated performance under both normal and highly skewed data distributions.

    • Main Results:

    • Z-score and range correction transformations substantially increased power with normally distributed data compared to averaging.
    • These transformations also performed well across various conditions with highly skewed data.
    • Outlier correction, particularly trimming, proved beneficial for increasing power.

    Conclusions:

    • Data transformations, specifically Z-scores and range correction, offer significant advantages for improving statistical power in within-subject designs.
    • These methods are robust across different data distributions, including skewed data common in psychological research.
    • Employing appropriate transformations and outlier handling (trimming) is recommended for more sensitive and reliable experimental findings.