I tried finding that specific video on women failing Piaget's water-level test that seems to have been made by "TextsFromTheNightBefore". I could not find it across many video sites, sadly. Surprisingly, I didn't find many -or any- videos at all discussing the causes for the disparity in test success/failure between sexes. However, I did locate a few studies on Piaget's test and the study with the liberal college women failing it, as well as some other papers that relate to it in their cited papers. >**Relationships among gender, cognitive style, academic major, and performance on the Piaget water-level task** >https://web.archive.org/web/20240331221447/https://pubmed.ncbi.nlm.nih.gov/7567394/ >https://archive.today/jaUou >"*In the present study, 27 male and 27 female architectural students and 27 male and 27 female liberal-arts students were assessed for their performance on both Piaget's Water-level Task and Witkin's Group Embedded Figures Test. No difference was found in performance of male and female architectural students on either task, but* **male liberal-arts students scored significantly higher than female liberal-arts students** *on both measures.*" > >**Observational training improves adult womens' performance on Piaget's water-level task** >https://web.archive.org/web/20240331222157/https://pubmed.ncbi.nlm.nih.gov/1641606/ >https://archive.today/riqg7 >"*Among women university students who lacked conceptual understanding of the principle that the surface of still water is always horizontal, a specific task procedure designed to optimize self-discovery of the principle proved effective. Successful learning was reflected in more accurate responses on an adjustment task and by a significant increase (p less than .01) in the number of subjects able to verbalize a correct strategy. In contrast to previous research the results show that adult womens' performance on the water-level task can be improved by observational training, suggesting that the female lag in spatial skills may depend on experiential factors.*" > >**Sex and Ability Differences in Neural Strategy for Piaget's Water Level Test** >https://web.archive.org/web/20240331222619/https://pubmed.ncbi.nlm.nih.gov/28361663/ >https://archive.today/BqjjH >"*To explore brain activation differences between the sexes and between high and low performers on spatial perception performance, 43 college students (20 males and 23 females) performed the Piaget's Water Level Test (WLT) while their electroencephalogram signals were recorded. A 2 (Sex) × 2 (Group: high performing vs. low performing) × 2 (Hemisphere: left vs. right) × 3 (Region: frontal, parietal, and temporal) mixed analysis of variance on beta power data showed that females more significantly activated the left hemisphere when performing the WLT, suggesting their application of an analytic strategy. In contrast, males showed a bilateral activation pattern, suggesting their use of an analytic- or holistic-combined strategy. Moreover, superior performance on the WLT was associated with enhanced temporal lobe functioning, suggesting that a superior analytic skill is key to successful performance on the WLT. There is likely modulating impact of both cognitive style and specific task properties on spatial perception strategy preferences.*" --- @AOU.