Characterizing global and local mechanisms in biological motion perception

Chang, Dorita H. F.; Troje, Nikolaus F.

doi:10.1167/9.5.8

Cited by 116 publications

(104 citation statements)

References 44 publications

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“…More experiments are necessary to find out in detail which stimulus properties elicit the facing bias, but it nevertheless might be interesting to speculate. Recent studies (Chang & Troje, 2008, 2009a, 2009bSaunders, Suchan, & Troje, 2009;Troje & Westhoff, 2006) showed that the local inversion effect in biological motion perception is carried by the dots representing the feet. Observers are able to correctly judge the left-right direction of a sagittal scrambled point-light figure.…”

Section: Discussionmentioning

confidence: 99%

The facing bias in biological motion perception: structure, kinematics, and body parts

Schouten

Troje

Verfaillie

2010

Atten Percept Psychophys

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Depth-ambiguous point-light walkers (PLWs) elicit a facing bias: Observers perceive a PLW as facing toward them more often than as facing away (Vanrie, Dekeyser, & Verfaillie, Perception, 33, 547-560, 2004 & Psychophysics, 72,1256& Psychophysics, 72, -1260& Psychophysics, 72, , 2010, it remains unclear whether the change in perceived in-depth orientation is caused by a change in perceived gender. In Experiment 1, we show that structural and kinematic stimulus properties that lead to the same changes in perceived gender elicit opposite changes in perceived in-depth orientation, indicating that the relation between perceived gender and in-depth orientation is not causal. The results of Experiments 2 and 3 further suggest that the perceived indepth orientation of PLWs is strongly affected by locally acting stimulus properties. The facing bias seems to be induced by stimulus properties in the lower part of the PLW.

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Section: Discussionmentioning

confidence: 99%

The facing bias in biological motion perception: structure, kinematics, and body parts

Schouten

Troje

Verfaillie

2010

Atten Percept Psychophys

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“…Walking direction can be detected quickly from seeing biological movements (Bertenthal & Pinto, 1994;Chang & Troje, 2008;2009a;2009b;Kuhlmeier, Troje & Lee, 2010;Neri, Morrone & Burr, 1998; see also Wang, Yang, Shi & Jiang, 2014), it can trigger attention (Shi, Weng, He & Jiang, 2010), and influence responses, even when it is task-irrelevant (Bosbach et al, 2004(Bosbach et al, , 2005Kourtzi & Shiffrar, 1999;Thornton & Vuong, 2004;Verfaillie, 2000).…”

Section: Point-light Displays and Other Biological Dot Stimulimentioning

confidence: 99%

Response Priming with More or Less Biological Movements as Primes

Eckert

Bermeitinger

2016

Atten Percept Psychophys

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Response priming in general is a suitable tool in cognitive psychology to investigate motor preactivations. Typically, compatibility effects reflect faster reactions in cases in which prime and target suggest the same response (i.e., compatible trials) compared with cases in which prime and target suggest opposite responses (i.e., incompatible trials). With moving dots that were horizontally aligned, Bermeitinger (2013) found a stable pattern of results: with short SOAs, faster responses in compatible trials were found; with longer SOAs up to 250 ms, faster responses in incompatible trials were found. It is unclear whether these results are specific to the special motion used therein or whether it generalizes to other motions. We therefore used other motions realized by arrangements of dots. In four experiments, we tested point-light displays (biological coherent walkers vs. less biological scrambled/split displays) as primes. In two experiments, eye gaze motions realized by moving dots representing irises and pupils (i.e., biological) versus the same motion either without surrounding face information or integrated in an abstract line drawing (i.e., less biological) were used. We found overall large positive compatibility effects with biological motion primes and also positive-but smaller-compatibility effects with less biological motion primes. Most important, also with very long SOAs (up to 1320 ms), we did not find evidence for negative compatibility effects. Thus, the pattern of positive-followed-by-negative-compatibility effects found in Bermeitinger (2013) seems to be specific to the materials used therein, whereas response priming in general seems an applicable tool to study motion perception.

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“…The perception of PLWs can be affected by learning [49,50]. Because people with DS generally take a longer time to initiate walking, this may interfere with their perception of PLW and their ability to perform fine discriminations actions such as walking [51].…”

Section: Discussionmentioning

confidence: 99%

Perception of Biological Motion Speed in Individuals with Down Syndrome

Tolentino-Castro¹,

Riddell²,

Wagner³

2017

J Down Syndr Chr Abnorm

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IntroductionAction and perception are two inherently linked aspects of human behavior that allow us to understand and interact with our surroundings. The interplay between action production and perception enables humans to act in a number of highly demanding situation such as unusual, novel or unstable environments [1]. Babies interact with their environment in a myriad of different ways such as imitation, selfmotion and observing the examples of others [2][3][4]. These interactions serve to shape not only their knowledge about the world, but also their understanding of the functionality of their bodies.Action performance interacts with action perception, and viceversa. This is reflected in the brain, as both performing and perceiving actions activate similar cortical areas [5]. Previous research has revealed significant interactions between action perception and action execution, and studies have shown that action perception can interfere with action execution reciprocally [6][7][8]. It is particularly insightful to study such interactions in populations with abnormal skeleto-muscular and/or neural development, as in these populations the brain may have adapted differently to handle physical differences, which in turn may influence how affected individuals interact with their surroundings. For example Sinha et al. [9] have shown that individuals with autism spectrum disorder, adapt their sensory input atypically, resulting in diverse behavioral traits. Down Syndrome (DS) is one of the most common genetic disorders (14 per 10 000 live births) caused by the presence of a complete or partial third copy of chromosome 21 (Trisomy 21) [10]. DS is a genetic change that impacts not only intellectual ability, but also motor development and motor control over the lifetime [11,12]. Abnormal brain functioning related to learning has been reveled in a number of studies [13][14][15][16]. In addition to neurodevelopmental abnormalities, corporal abnormalities are also common in DS. These abnormalities are highly related to the impaired motor control of voluntary movements [11,17].Children with DS require more time to learn basic movements. Additionally, as movement complexity increases they achieve gross motor functions at an average age that is almost twice that of typically developed children [18]. However, despite delays in motor development and the control of voluntary movements, the DS population does not exhibit a complete absence of the production of gross motor skills. For instance, individuals with DS are often capable of walking and jumping, as well as fine motor skills and manual dexterity. Examples of functional motor development can be seen when special teaching strategies are implemented [19][20][21][22][23][24]. This demonstrates that individuals with DS are at least somewhat able to adapt to their motor impairments. In more realistic tasks, Latash [11,17] argue that, when confronted with an unexpected or unclear motion situation, individuals with DS choose to act slowly (bradykinesia) during the initiation ph...

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Characterizing global and local mechanisms in biological motion perception

Cited by 116 publications

References 44 publications

The facing bias in biological motion perception: structure, kinematics, and body parts

The facing bias in biological motion perception: structure, kinematics, and body parts

Response Priming with More or Less Biological Movements as Primes

Perception of Biological Motion Speed in Individuals with Down Syndrome

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