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The vast majority of previous VWM research has used two-dimensional stimuli, while real-world visual perception incorporates depth-related spatial cues which may affect performance. Prior work suggests that depth could enhance VWM performance by enabling perceptual enrichment and better individuation, but may also introduce additional cognitive processing costs and impair performance. Here, we directly tested how dimensionality influences VWM under different memory loads using a virtual reality adaptation of the change detection task, enabling the presentation of ecologically valid, real-world 2D and 3D objects. While accuracy was comparable across stimulus dimensionality, response times for 3D stimuli showed larger increases at higher memory loads. These results suggest that even though 3D stimuli may enrich perceptual input, they introduce processing costs that become more apparent under high memory load, possibly demanding additional neural resources associated with depth processing.<\/jats:p>","DOI":"10.1007\/s10055-026-01343-0","type":"journal-article","created":{"date-parts":[[2026,3,21]],"date-time":"2026-03-21T06:23:46Z","timestamp":1774074226000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Beyond flatland: naturalistic three-dimensional stimuli and visual working memory processing"],"prefix":"10.1007","volume":"30","author":[{"given":"Gilad","family":"Schrift","sequence":"first","affiliation":[]},{"given":"Shachar","family":"Lando","sequence":"additional","affiliation":[]},{"given":"Roy","family":"Luria","sequence":"additional","affiliation":[]},{"given":"Nitzan","family":"Censor","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2026,3,21]]},"reference":[{"key":"1343_CR1","doi-asserted-by":"publisher","first-page":"556","DOI":"10.1126\/science.1736359","volume":"255","author":"A Baddeley","year":"1992","unstructured":"Baddeley A (1992) Working memory. 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