title: Perceived causality, force, and resistance in the absence of launching.
abstract: In the launching effect, a moving object (the launcher) contacts a stationary object (the target), and upon contact, the launcher stops and the target begins moving in the same direction and at the same or slower velocity as previous launcher motion (Michotte, 1946/1963). In the study reported here, participants viewed a modified launching effect display in which the launcher stopped before or at the moment of contact and the target remained stationary. Participants rated perceived causality, perceived force, and perceived resistance of the launcher on the target or the target on the launcher. For launchers and for targets, increases in the size of the spatial gap between the final location of the launcher and the location of the target decreased ratings of perceived causality and ratings of perceived force and increased ratings of perceived resistance. Perceived causality, perceived force, and perceived resistance exhibited gradients or fields extending from the launcher and from the target and were not dependent upon contact of the launcher and target. Causal asymmetries and force asymmetries reported in previous studies did not occur, and this suggests that such asymmetries might be limited to typical launching effect stimuli. Deviations from Newton's laws of motion are noted, and the existence of separate radii of action extending from the launcher and from the target is suggested.
authors.affiliation: Arizona State University, Tempe, AZ, USA. timothyleehubbard@gmail.com.
authors.forename: Timothy L
authors.initials: TL
authors.lastname: Hubbard
authors.affiliation: University of South Carolina Upstate, Spartanburg, SC, USA.
authors.forename: Susan E
authors.initials: SE
authors.lastname: Ruppel
mesh_terms: D000328:Adult; D006801:Humans; D009039:Motion Perception / Q000502:physiology*; D011597:Psychomotor Performance / Q000502:physiology*; D013028:Space Perception / Q000502:physiology*; D055815:Young Adult
keywords: Causal asymmetry; Launching effect; Naïve physics; Perception of causality; Perception of force