The purpose of this research was to investigate a set of factors that may influence the perceived rate of an auditory event. In a paired-comparison task, subjects were presented with a set of music-like patterns that differed in their relative number of contour changes and in the magnitude ofpitch skips (Experiment 1) as well as in the compatibility of rhythmic accent structure with the arrangement of pitch relations (Experiment 2). Results indicated that, relative to their standard referents, comparison melodies were judged to unfold more slowly when they displayed more changes in pitch direction, greater pitch distances, and an incompatible rhythmic accent structure. These flndings are suggested to stern from an imputed velocity hypo thesis, in which people overgeneralize certain invariant relations that typically occur between melodic and temporal accent structure within Western music.In the study of event perception, one issue of particular interest is the effects ofan event's spatiotemporal structure on cognitive behavior. Any given event, whether it is a melody, speech utterance, or visual scene, is necessarily dynamic in nature and displays an array ofnontemporal (spatial) information that unfolds with a given rate and rhythmicity over a total time span. In considering how this information is processed by the cognitive system, several studies have examined the effects ofan event's rhythm, relative to the array of nontemporal information, on perception and selective attending skills as well as the subsequent remembering of events (see Fraisse, 1978Fraisse, , 1982. Others have focused on the experienced and remembered duration of an event and on how characteristics ofthe information filling a time span influence both the accuracy and the bias ofjudgments (see Allan, 1979;Block, 1979;Fraisse, 1984Fraisse, , 1987. Surprisingly, however, there is relatively little research in which those factors that influence the perception and remembering oftempo information are investigated. This omission in the literature is particularly puzzling in that the rate of informational flow will directly determine an event's total duration and has been found to alter the perceived rhythm of an event (Clarke, 1982;Handel, 1993;Marshburn & Jones, 1985;Pierson, 1976;Povel, 1977). Hence, tempo is a primary aspect ofan event's structure that covaries with other temporal dimensions and, therefore, merits additional investigation, in order to determine its role in cognitive behavior.The purpose ofthe present research is to investigate a set of variables that may influence the perceived tempo ofmusic-like patterns. One such variable involves the po- tential impact of a melody's rhythm and whether the arrangement of temporal accents, relative to the array of melodic structure, can alter the apparent rate of a tune. With the second set offactors, the role ofpitch information and how the overall contour of pitch intervals (i.e., the ups and downs ofpitch), as well as the magnitude of pitch skips, mayaiso exert a significant impact on behav...