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Syst."],"published-print":{"date-parts":[[2019,7,31]]},"abstract":"<jats:p>\n            Prior work has studied how different characteristics of individual users (e.g., personality traits and cognitive abilities) can impact search behaviors and outcomes. We report on a laboratory study (\n            <jats:italic>N<\/jats:italic>\n            = 32) that investigated the effects of three different cognitive abilities (perceptual speed, working memory, and inhibition) in the context of aggregated search. Aggregated search systems combine results from multiple heterogeneous sources (or\n            <jats:italic>verticals<\/jats:italic>\n            ) in a unified presentation. Participants in our study interacted with two different aggregated search interfaces (a within-subjects design) that differed based on the extent to which the layout distinguished between results originating from different verticals. The\n            <jats:italic>interleaved<\/jats:italic>\n            interface merged results from different verticals in a fairly unconstrained fashion. Conversely, the\n            <jats:italic>blocked<\/jats:italic>\n            interface displayed results from the same vertical as a group, displayed each group of vertical results in the same region on the SERP for every query, and used a border around each group of vertical results to help distinguish among results from different sources. We investigated three research questions (RQ1--RQ3). Specifically, we investigated the effects of the interface condition and each cognitive ability on three types of outcomes: (RQ1) participants\u2019 levels of workload, (RQ2) participants\u2019 levels of user engagement, and (RQ3) participants\u2019 search behaviors. Our results found different main and interaction effects. Perceptual speed and inhibition did not significantly affect participants\u2019 workload and user engagement but significantly affected their search behaviors. Specifically, with the interleaved interface, participants with lower perceptual speed had more difficulty finding relevant results on the SERP, and participants with lower inhibitory attention control searched at a slower pace. Working memory did not have a strong effect on participants\u2019 behaviors but had several significant effects on the levels of workload and user engagement reported by participants. Specifically, participants with lower working memory reported higher levels of workload and lower levels of user engagement. We discuss implications of our results for designing aggregated search interfaces that are well suited for users with different cognitive abilities.\n          <\/jats:p>","DOI":"10.1145\/3322128","type":"journal-article","created":{"date-parts":[[2019,5,17]],"date-time":"2019-05-17T12:50:40Z","timestamp":1558097440000},"page":"1-34","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":26,"title":["The Effects of Working Memory, Perceptual Speed, and Inhibition in Aggregated Search"],"prefix":"10.1145","volume":"37","author":[{"given":"Jaime","family":"Arguello","sequence":"first","affiliation":[{"name":"School of Information and Library Science, University of North Carolina at Chapel Hill"}]},{"given":"Bogeum","family":"Choi","sequence":"additional","affiliation":[{"name":"School of Information and Library Science, University of North Carolina at Chapel Hill"}]}],"member":"320","published-online":{"date-parts":[[2019,5,16]]},"reference":[{"key":"e_1_2_1_1_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ipm.2011.03.002"},{"key":"e_1_2_1_2_1","doi-asserted-by":"publisher","DOI":"10.1145\/133160.133212"},{"key":"e_1_2_1_3_1","volume-title":"Perceptual speed, learning and information retrieval performance","author":"Allen Bryce","unstructured":"Bryce Allen . 1994. 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