= .16 (Fig. 1). In Experiment 2, we examined the developmental origins of this sensitivity. One possibility is that this sensitivity is a core component of causal perception and emerges with it around 6 months (Leslie & Keeble, 1987). A second possibility is that the visual sensitivity to impossible launching events is a distinct capacity and emerges only after causal perception is in place. In our study, 7-month-old infants (N = 16, 8 male, average age 6;27) and 9-month-old infants (N = 15, 7 male, average age 9;15) were habituated to 1:1 launching events. Following habituation, they saw a single asymmetric launching event at either a possible (3:1) or impossible (1:3) speed ratio, between-subjects. 9-month-olds looked significantly longer at impossible events than possible events, t(13) = 2.37, p = .034. However, 7-month-olds looked equally long at both event types, t(14) = 1.27, p = .22 (Fig. 2). Data collection is currently underway on non-causal control conditions. Thus far, these results suggest that sensitivity to the Newtonian principles governing collision events emerges after infants’ ability to detect causal launching events. Content is hosted by All Academic Inc, a leading provider of online hosting and software solutions for academic conferences supporting submission, peer review, scheduling, invitaions, volunteers, scheduling, web-based programs, advanced bulk email, custom workflows, and more for conferences of scholarly societies since 1999." />
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Poster #43 - 9-Month-Olds, But Not 7-Month-Olds, Show Sensitivity to Principles of Newtonian Physics in Causal Launching Events

Thu, March 19, 3:50 to 5:05pm, Penn CC, Floor: 200 Level, Exhibit Hall A

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