{{Short description|Swedish psychologist (1925–2017)}} {{Use dmy dates|date=November 2024}} '''David Natanael Magnusson''' (1925 in Nässjö, Sweden – 2017 in Lidingö, Sweden)<ref>Obituary in ''Svenska Dagbladet'' 16 September 2017 (p. 53).</ref> was a Swedish psychologist. He was professor in psychology at Stockholm University from 1969 to 1992.
David Magnusson is known for several theoretical, methodological and empirical contributions to psychological science. Theoretically, he developed an approach to psychological research called holistic interactionism.<ref>Magnusson, D. (1999). Holistic interactionism: A perspective for research on personality development. In L. Pervin & O. John (Eds.), Handbook of personality (pp. 219–247). New York: Guilford</ref> The basic assumption is that each person is seen holistically, with multiple systems that interact with the environment in various unique ways. Methodologically, this means that developmental processes are idiosyncratic.<ref>Magnusson, D. (2000). Individual development: Toward a developmental science. Proceedings of the American Philosophical Society, 143, 86–96. </ref> He therefore argued for a person-oriented approach as an alternative, or at least as a complement, to the traditional variable-oriented approach in psychological research.<ref>Bergman, L. R. & Lundh, L. G. (2015). Introduction: The person-oriented approach: Roots and roads to the future. Journal for Person-Oriented Research, 1, 1–6. doi:10.17 505/jpor.2015.01</ref>
Magnusson is also known for his longitudinal study Individual Development and Adaptation (IDA),<ref>Magnusson, D. (1988). Individual development from an interactional perspective: A longitudinal study. Hillsdale, NJ, England: Lawrence Erlbaum Associates, Inc.</ref> which he started in the 1960s and led until 1996.<ref>Bergman, L. R., & Lundh, L. G. (2018). In memoriam: David Magnusson 1925–2017. Journal for Person-Oriented Research, 3(2), 65–66. https://doi.org/10.17505/jpor.2017.06</ref> This research program targeted two whole cohorts of school children in Örebro, Sweden. These individuals were then followed through more than 20 data collections over more than 50 years. After Magnusson's retirement, the IDA program was led by professor Lars R. Bergman, Stockholm University, and after Bergman's retirement by professors Henrik Andershed and Anna-Karin Andershed at Örebro University. The IDA program has led to more than 500 scientific publications.<ref>Bergman, L. R., Andershed, A.-K., Meehan, A., & Andershed, H. (2018). Individual development and adaptation (IDA): A lifespan longitudinal program suited for person-oriented research. Journal for Person-Oriented Research, 4(2), 63–77. doi: 10.17505/jpor.2018.07</ref>
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{{DEFAULTSORT:Magnusson, David}} Category:1925 births Category:2017 deaths Category:Swedish psychologists Category:Academic staff of Stockholm University Category:People from Nässjö
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