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  Constancy in Dynamic Touch: Length Perceived by Dynamic Touch Is Invariant Over Changes in Media
 
 
Titel: Constancy in Dynamic Touch: Length Perceived by Dynamic Touch Is Invariant Over Changes in Media
Auteur: Pagano, Christopher C.
Cabe, Patrick A.
Verschenen in: Ecological psychology
Paginering: Jaargang 15 (2003) nr. 1 pagina's 1-17
Jaar: 2003-01-01
Inhoud: Following a procedure employed by Pagano and Donahue (1999), participants reported the lengths of occluded rods wielded in air or water. In this experiment we manipulated moment of inertia-the resistance to angular rotation due to the rod's mass distribution-by varying the length and composition of the rods. We manipulated drag-the resistance to object movement due to the displacement of a fluid medium -by varying the length of the rods and by wielding them in air or in water. The rods were constructed such that moment of inertia and drag were decorrelated. Although the torques required to wield in water are substantially greater than those required to wield in air, the perceived lengths of rods wielded in the 2 media were equivalent. Perceived length was a function of inertia in both media conditions; there was no significant contribution of drag. The experiment demonstrated that perceivers can extract the physical invariant of inertia by attending to the time-varying patterns from the complex arrays of forces created by movement of rods in the denser medium of water. These results underscore the importance of invariants in perception.
Uitgever: Routledge
Bronbestand: Elektronische Wetenschappelijke Tijdschriften
 
 

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