Bayerl, Gloria (2025) Gender Differences in Intelligence: Age-Dependent Trends in Cognitive Development in Childhood and Adolescence. Bachelor thesis, Psychology.
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Abstract
Gender differences in intelligence scores have been observed since decades (Halpern & Wai, 2019). This thesis examined these differences by applying GAMLSS to subdomain data from the IDS-2. The added value of GAMLSS is its ability to reveal age-related changes in gender differences within intelligence scores, indicating whether and how they evolve over time. The IDS-2 is a cognitive test battery for ages 5 to 20, with 14 subtests on seven intelligence subdomains. In a sizable normative sample, we modelled subtest and subdomain scores continuously across age for boys and girls. Results indicated a variation of stable and age-varying gaps of marginal size. We found negligible stable sex differences in visual processing, visual-spatial short-term memory, abstract and verbal reasoning. Whereas we observed significant age-by-gender shifts in long-term memory and processing speed, and to a lesser extent also in auditory short-term memory. Our results highlight that age-only norms could misclassify performance by gender and suggest that we should potentially consider accounting for both age and gender in certain subdomains to ensure equitable assessment and interpretation.
| Item Type: | Thesis (Bachelor) |
|---|---|
| Supervisor name: | Heister, H.M. |
| Degree programme: | Psychology |
| Differentiation route: | None [Bachelor Psychology] |
| Date Deposited: | 09 Jul 2025 09:15 |
| Last Modified: | 09 Jul 2025 09:15 |
| URI: | http://gmwpublic.studenttheses.ub.rug.nl/id/eprint/5398 |
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