Reply to Adolf and Fried: Conditional equivalence and imperatives for person-level science

John D Medaglia^{1

2

3}, Bertus F Jeronimus^{4

5}, Aaron J Fisher⁶

Affiliations

¹ Department of Psychology, Drexel University, Philadelphia, PA 19104.
² Department of Neurology, Drexel University, Philadelphia, PA 19104.
³ Department of Neurology, University of Pennsylvania, Philadelphia, PA 19104.
⁴ Department of Developmental Psychology, Faculty of Behavioural and Social Sciences, University of Groningen, 9712 TS Groningen, The Netherlands.
⁵ Interdisciplinary Center Psychopathology and Emotion Regulation, Department of Psychiatry, University Medical Center Groningen, University of Groningen, 9700 RB Groningen, The Netherlands.
⁶ Department of Psychology, University of California, Berkeley, CA 94720 afisher@berkeley.edu.

Comment

John D Medaglia et al. Proc Natl Acad Sci U S A. 2019.

. 2019 Apr 2;116(14):6542-6543.

doi: 10.1073/pnas.1820221116. Epub 2019 Mar 14.

John D Medaglia^{1

2

3}, Bertus F Jeronimus^{4

5}, Aaron J Fisher⁶

¹ Department of Psychology, Drexel University, Philadelphia, PA 19104.
² Department of Neurology, Drexel University, Philadelphia, PA 19104.
³ Department of Neurology, University of Pennsylvania, Philadelphia, PA 19104.
⁴ Department of Developmental Psychology, Faculty of Behavioural and Social Sciences, University of Groningen, 9712 TS Groningen, The Netherlands.
⁵ Interdisciplinary Center Psychopathology and Emotion Regulation, Department of Psychiatry, University Medical Center Groningen, University of Groningen, 9700 RB Groningen, The Netherlands.
⁶ Department of Psychology, University of California, Berkeley, CA 94720 afisher@berkeley.edu.

No abstract available

Conflict of interest statement

The authors declare no conflict of interest.

Lack of group-to-individual generalizability is a threat to human subjects research.
Fisher AJ, Medaglia JD, Jeronimus BF. Fisher AJ, et al. Proc Natl Acad Sci U S A. 2018 Jul 3;115(27):E6106-E6115. doi: 10.1073/pnas.1711978115. Epub 2018 Jun 18. Proc Natl Acad Sci U S A. 2018. PMID: 29915059 Free PMC article. Clinical Trial.
Ergodicity is sufficient but not necessary for group-to-individual generalizability.
Adolf JK, Fried EI. Adolf JK, et al. Proc Natl Acad Sci U S A. 2019 Apr 2;116(14):6540-6541. doi: 10.1073/pnas.1818675116. Epub 2019 Mar 14. Proc Natl Acad Sci U S A. 2019. PMID: 30872469 Free PMC article. No abstract available.

1. Adolf JK, Fried EI. Ergodicity is sufficient but not necessary for group-to-individual generalizability. Proc Natl Acad Sci USA. 2019;116:6540–6541. - PMC - PubMed
1. Fisher AJ, Medaglia JD, Jeronimus BF. Lack of group-to-individual generalizability is a threat to human subjects research. Proc Natl Acad Sci USA. 2018;115:E6106–E6115. - PMC - PubMed
1. Adolf J, Schuurman NK, Borkenau P, Borsboom D, Dolan CV. Measurement invariance within and between individuals: A distinct problem in testing the equivalence of intra- and inter-individual model structures. Front Psychol. 2014;5:883. - PMC - PubMed
1. Evans AC, Janke AL, Collins DL, Baillet S. Brain templates and atlases. Neuroimage. 2012;62:911–922. - PubMed
1. Miller MB, et al. Extensive individual differences in brain activations associated with episodic retrieval are reliable over time. J Cogn Neurosci. 2002;14:1200–1214. - PubMed