Logt, Lan Gui van der (2025) Socioeconomic Status and Intelligence in Dutch Children. Bachelor thesis, Psychology.
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Abstract
This study examined how socioeconomic status (SES) relates to intelligence across childhood and adolescence, using data modeled after the Dutch norming sample for the Intelligence and Development Scales–2 (IDS-2). A total of 1,372 participants aged 5 to 20 were included in the analysis. Generalized Additive Models for Location, Scale, and Shape (GAMLSS) were used to investigate developmental trajectories and distributional differences in general intelligence (G), fluid intelligence (Gf), and crystallized intelligence (Gc). Results showed that children from higher SES backgrounds consistently scored higher in all intelligence domains. SES tended to widen with age, particularly for the lower-performing children. In contrast, SES gaps narrowed at higher performance levels, suggesting that high-performing children may be less affected by SES constraints. Due to methodological limitations, differences in SES effects between Gf and Gc could not be directly compared. These findings underscore the need to consider SES when interpreting intelligence test scores and raise concerns about the fairness of cognitive assessments in socioeconomically diverse populations.
| Item Type: | Thesis (Bachelor) |
|---|---|
| Supervisor name: | Heister, H.M. |
| Degree programme: | Psychology |
| Differentiation route/Track: | None [Bachelor Psychology] |
| Date Deposited: | 10 Jul 2025 15:03 |
| Last Modified: | 10 Jul 2025 15:03 |
| URI: | http://gmwpublic.studenttheses.ub.rug.nl/id/eprint/5444 |
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