launching effect
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2020 ◽  
Vol 34 (4) ◽  
pp. 423-439
Author(s):  
Emily J. A-Izzeddin ◽  
Philip M. Grove

Abstract We conducted two experiments to evaluate Meyerhoff and Scholl’s (2018, Cognition 170, 88–94) hypothesis that illusory crescents contribute to resolutions in audiovisual stream/bounce displays. In Experiment 1, we measured illusory crescent size in the launching effect as a function of speed, overlap, and sound. In Experiment 2, we tabulated stream and bounce responses to similar stimuli with the same speed, sound, and overlap conditions as Experiment 1. Our critical manipulation of target speed spanned the range of values from typical stream/bounce investigations of ∼5 degrees/s up to the target speeds employed by Meyerhoff and Scholl ∼38 degrees/s. We replicated Meyerhoff and Scholl’s findings at higher speeds, but not at slower speeds. Critically, we found that speed influenced crescent size judgements and bouncing responses in opposite directions. As target speed increased, illusory crescent size increased (Experiment 1), but the overall percentage of bounce responses decreased (Experiment 2). Additionally, we found that sound failed to enhance illusory crescent size at slower speeds but promotes bouncing responses at all speeds. The disassociation of the effects of speed and sound on illusory crescents with those effects on reported streaming/bouncing in similar displays provides compelling evidence against Meyerhoff and Scholl’s hypothesis. Therefore, we conclude that illusory crescents do not account for the pattern of responses attributed to the stream/bounce effect.


2019 ◽  
Vol 82 (3) ◽  
pp. 1431-1442 ◽  
Author(s):  
Yunyun Chen ◽  
Bihua Yan
Keyword(s):  

2015 ◽  
Vol 27 (10) ◽  
pp. 1887-1894 ◽  
Author(s):  
Andre Mascioli Cravo ◽  
Karin Moreira Santos ◽  
Marcelo Bussotti Reyes ◽  
Marcelo Salvador Caetano ◽  
Peter M. E. Claessens

The detection of causality is essential for our understanding of whether distinct events relate. A central requirement for the sensation of causality is temporal contiguity: As the interval between events increases, causality ratings decrease; for intervals longer than approximately 100 msec, the events start to appear independent. It has been suggested that this effect might be due to perception relying on discrete processing. According to this view, two events may be judged as sequential or simultaneous depending on their temporal relationship within a discrete neuronal process. To assess if alpha oscillations underlie this discrete neuronal process, we investigated how these oscillations modulate the judgment of causality. We used the classic launching effect with concurrent recording of EEG signal. In each trial, a disk moved horizontally toward a second disk at the center of the screen and stopped when they touched each other. After a delay that varied between 0 and 400 msec after contact, the right disk began to move. Participants were instructed to judge whether or not they had a feeling that the first disk caused the movement of the second disk. We found that frontocentral alpha phase significantly biased causality estimates. Moreover, we found that alpha phase was concentrated around different angles for trials in which participants judged events as causally related versus not causally related. We conclude that alpha phase plays a key role in biasing causality judgments.


2010 ◽  
Vol 10 (7) ◽  
pp. 798-798 ◽  
Author(s):  
S.-H. Kim ◽  
M. Singh ◽  
J. Feldman

2006 ◽  
Vol 86 (2) ◽  
pp. 223-237 ◽  
Author(s):  
Michael E. Young ◽  
Joshua S. Beckmann ◽  
Edward A. Wasserman
Keyword(s):  

2005 ◽  
Author(s):  
Michael E. Young ◽  
Joshua S. Beckmann ◽  
Edward A. Wasserman
Keyword(s):  

2000 ◽  
Author(s):  
Timothy L. Hubbard ◽  
Susan E. Ruppel ◽  
Alessia Favretto

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