Rigorous idiography: Exploring subjective and idiographic data with rigorous methods-The method of derangements

Area of Science:

• Psychology
• Psychometrics
• Statistical analysis

Background:

• Psychological research traditionally focuses on generalizable findings across individuals (nomothetic data).
• This focus often leads to the neglect of unique individual experiences (idiographic data).
• Existing statistical methods primarily support nomothetic data, limiting the analysis of idiographic information.

Purpose of the Study:

• To review and promote the method of derangements for analyzing idiographic data in psychology.
• To demonstrate the reliability and potential of rigorous idiography for understanding unique individual experiences.
• To encourage wider adoption and correct application of the method in research and practice.

Main Methods:

• Review of the method of derangements, a statistical test for idiographic data analysis.
• Discussion of its theoretical underpinnings and practical application in psychological research.
• Analysis of why the method has been underutilized despite its potential.

Main Results:

• The method of derangements is a simple yet powerful statistical tool for assessing the reliability of idiographic data.
• Despite its potential, the method has remained in a 'bibliometric backwater', limiting its widespread use.
• The paper expands on the method's utility, demonstrating its capacity to convey reliable information from unique individual data.

Conclusions:

• Rigorous idiography, particularly through the method of derangements, offers a valuable approach to complement nomothetic research.
• The method provides a statistically sound way to analyze and derive reliable insights from individual-specific data.
• Wider adoption of the method of derangements is encouraged for advancing psychological research and clinical practice.