Psychology Atlas

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Branches of Psychology

Quantitative Psychology

Psychometrics, Statistics and Methodology

Quantitative psychology is the branch of psychology that develops and applies the mathematical, statistical and psychometric methods used to measure psychological constructs and test psychological theories, including test construction, research design and the statistical models used across the rest of the field. Psychometrics, the theory and technique of psychological measurement, is one specialized method quantitative psychologists develop and use, not a separate, unrelated discipline.

Facts
Central Question
What statistical and measurement methods allow psychological constructs, such as intelligence, personality or attitudes, to be measured validly and their relationships tested rigorously? 1
Key Debate
Whether psychology's replication crisis reflects fixable methodological and statistical practices or points to deeper problems in the field's underlying theories remains contested; failed replications have triggered sharp disagreement between replication researchers and the original study authors. 2
Connections

Includes

Brian Nosek, Psychologists
Source Wikipedia: Brian Nosek
Common Source Bias, Psychological Phenomena
Courtesy Bias, Psychological Phenomena
Psychometrics, Theories and Concepts
Source Wikipedia: Quantitative Psychology
Replication Crisis, Theories and Concepts
Source Wikipedia: Replication crisis
Reproducibility Project: Psychology, Studies and Experiments
Source Wikipedia: Replication crisis
Sources
1. Wikipedia: Quantitative Psychology
Wikimedia FoundationLead section
Quote, Lead section
Quantitative psychology is a field of scientific study that focuses on the mathematical modeling, research design and methodology, and statistical analysis of psychological processes.
2. Wikipedia: Replication crisis
Wikipedia
  • History section
    These replication failures triggered intense disagreement between replication researchers and the original authors.
  • Includes: Reproducibility Project: Psychology, Reproducibility Project scope section
    Coordinated by psychologist Brian Nosek, researchers redid 100 studies in psychological science from three high-ranking psychology journals
  • Includes: Replication Crisis, Causes section, publication bias
    Publication bias-the tendency to publish only positive, significant results-creates the 'file drawer effect', where negative results remain unpublished.
View the Source
Wikipedia: Brian Nosek
Wikimedia FoundationIncludes: Brian Nosek, Work section
Quote, Includes: Brian Nosek, Work section
In 2011, Nosek and his collaborators set up the Reproducibility Project, with the aim of trying to replicate the results of 100 psychological experiments published in respected journals in 2008.
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