Perceived Heaviness Is Influenced by the Style of Lifting

Amazeen, Eric L.; Tseng, Philip; Valdez, André B.; Vera, Diego

doi:10.1080/10407413.2011.539100

Cited by 17 publications

(13 citation statements)

References 43 publications

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“…In a similar fashion, infants as early as 5 to 12 weeks old have been observed to increase their sucking rate when the clarity (i.e., focus) of the visual scene is made contingent on sucking rate [ 43 ], see also [ 44 ]. In adults, it has been proposed that optical information could serve to enhance and facilitate the detection of rotational inertia, e.g., [ 31 , 45 ].…”

Section: Discussionmentioning

confidence: 99%

Exploratory Movement Generates Higher-Order Information That Is Sufficient for Accurate Perception of Scaled Egocentric Distance

et al. 2015

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Body movement influences the structure of multiple forms of ambient energy, including optics and gravito-inertial force. Some researchers have argued that egocentric distance is derived from inferential integration of visual and non-visual stimulation. We suggest that accurate information about egocentric distance exists in perceptual stimulation as higher-order patterns that extend across optics and inertia. We formalize a pattern that specifies the egocentric distance of a stationary object across higher-order relations between optics and inertia. This higher-order parameter is created by self-generated movement of the perceiver in inertial space relative to the illuminated environment. For this reason, we placed minimal restrictions on the exploratory movements of our participants. We asked whether humans can detect and use the information available in this higher-order pattern. Participants judged whether a virtual object was within reach. We manipulated relations between body movement and the ambient structure of optics and inertia. Judgments were precise and accurate when the higher-order optical-inertial parameter was available. When only optic flow was available, judgments were poor. Our results reveal that participants perceived egocentric distance from the higher-order, optical-inertial consequences of their own exploratory activity. Analysis of participants’ movement trajectories revealed that self-selected movements were complex, and tended to optimize availability of the optical-inertial pattern that specifies egocentric distance. We argue that accurate information about egocentric distance exists in higher-order patterns of ambient energy, that self-generated movement can generate these higher-order patterns, and that these patterns can be detected and used to support perception of egocentric distance that is precise and accurate.

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Section: Discussionmentioning

confidence: 99%

Exploratory Movement Generates Higher-Order Information That Is Sufficient for Accurate Perception of Scaled Egocentric Distance

et al. 2015

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“…Such manipulations consistently produce a decrease in perceived heaviness. There are, however, a few studies that have varied height and width separately (Amazeen, 1997;Amazeen, Tseng, Valdez, & Vera, 2011;Ayoub, Mital, Bakken, Asfour, & Bathea, 1980;Ciriello & Snook, 1983;Garg & Badger, 1986;Garg & Saxena, 1980;Mital & Fard, 1986;Valdez & Amazeen, 2008). Some of these studies have shown that increasing volume by increasing height alone will increase perceived heaviness (Amazeen, 1997;Ayoub et al, 1980;Garg & Badger, 1986;Mital & Fard, 1986).…”

Section: Effects Of Shape On Perceived Weightmentioning

confidence: 99%

Box Shape Influences the Size-Weight Illusion During Individual and Team Lifting

Amazeen

2013

Hum Factors

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“…Participants were allowed to view the objects during all lifting trials. Research has shown that heaviness perception decreases as volume increases through both width and length regardless of whether or not participants can view objects (Amazeen, 1997;Amazeen et al, 2011). The Institutional Review Board at Arizona State University approved all procedures.…”

Section: Methodsmentioning

confidence: 99%

“…To perceive heaviness, one typically lifts an object to monitor how it responds to the forces produced by the muscles (Lederman & Klatzky, 1987; Streit, Shockley, Morris, & Riley, 2007; Streit, Shockley, & Riley, 2007; Waddell, Fine, Likens, Amazeen, & Amazeen, in press). However, there are different ways to lift an object and manipulating the lifting movements can produce systematic changes in perception (Amazeen, Tseng, Valdez, & Vera, 2011). In general, though, people tend to show motor preferences when performing perceptual-motor tasks (Schütz, 2014).…”

mentioning

confidence: 99%

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Lift speed moderates the effects of muscle activity on perceived heaviness

Waddell

Amazeen

2018

Quarterly Journal of Experimental Psychology

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Research has shown that perceived heaviness is a function of the ratio of muscle activity (measured by electromyogram [EMG]) to the resulting acceleration of the object. However, objects will commonly be lifted at different speeds, implying variation in both EMG and acceleration. This study examined the effects of lifting speed by having participants report perceived heaviness for objects lifted by elbow flexion at three different speeds: slow, preferred, and fast. EMG and angular acceleration were recorded during these lifts. Both EMG and angular acceleration changed across lift speed. Nevertheless, despite these variations, perceived heaviness consistently scaled to the ratio of EMG to angular acceleration. The exponents on these parameters suggested that the saliency of muscle activity and movement changed across the three lift speeds.

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Perceived Heaviness Is Influenced by the Style of Lifting

Cited by 17 publications

References 43 publications

Exploratory Movement Generates Higher-Order Information That Is Sufficient for Accurate Perception of Scaled Egocentric Distance

Exploratory Movement Generates Higher-Order Information That Is Sufficient for Accurate Perception of Scaled Egocentric Distance

Box Shape Influences the Size-Weight Illusion During Individual and Team Lifting

Lift speed moderates the effects of muscle activity on perceived heaviness

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