Visually guided grasping: Using a small stimulus set can lead to overestimation of the effectiveness of depth cues

B. Keefe; M. Elsby; S. Watt

doi:10.1167/8.6.302

The Importance of Stereo and Eye-Coupled Perspective for Eye-Hand Coordination in Fish Tank VR

Presence Teleoperators & Virtual Environments ◽

10.1162/1054746042545300 ◽

2004 ◽

Vol 13 (5) ◽

pp. 549-559 ◽

Cited By ~ 37

Author(s):

Roland Arsenault ◽

Colin Ware

Keyword(s):

Force Feedback ◽

Motion Parallax ◽

Visual Display ◽

Head Tracking ◽

Visually Guided ◽

High Quality ◽

Depth Cues ◽

Hand Coordination ◽

Fish Tank ◽

Sense Of Touch

It is possible to simulate a high-quality virtual environment with viewpoint-controlled perspective, high-quality stereo, and a sense of touch obtained with the PHANToM force feedback device using existing “fish tank VR” technologies. This enables us to investigate the importance of different depth cues and touch using higher quality visual display than is possible with more immersive technologies. Prior work on depth perception suggests that different depth cues are important depending on the task performed. A number of studies have shown that motion parallax is more important than stereopsis in perceiving 3D patterns, but other studies suggest that stereopsis should be critically important for visually guided reaching. A Fitts' Law tapping task was used to investigate the relative importance of stereo and head tracking in visually guided hand movements. It allowed us to examine the intertap intervals following a head movement in order to look for evidence of rapid adaptation to a misplaced head position. The results show that stereo is considerably more important than eye-coupled perspective for this task, and that the benefits increase as task difficulty increases. Disabling stereo increased mean intertap intervals by 33%, while disabling head tracking produced only an 11% time increase. However, we failed to find the expected evidence for adaptation during the series of taps. We conclude by discussing the theoretical and practical implications of the results.

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OSIEshort: A small stimulus set can reliably estimate individual differences in semantic salience

Journal of Vision ◽

10.1167/jov.20.9.13 ◽

2020 ◽

Vol 20 (9) ◽

pp. 13

Author(s):

Marcel Linka ◽

Benjamin de Haas

Keyword(s):

Individual Differences ◽

Small Stimulus ◽

Stimulus Set

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A replication of the inverted U-shaped relationship between rhythmic complexity and the sensation of groove with a small stimulus set

10.31234/osf.io/n3yhq ◽

2021 ◽

Author(s):

Jan Stupacher ◽

Markus Wrede ◽

Peter Vuust

Keyword(s):

High Harmonic ◽

Moderate Amount ◽

Musical Rhythm ◽

Small Stimulus ◽

Stimulus Set

The experience of groove is defined as a pleasurable state of wanting to move one’s body in relation to the pulse of a musical rhythm. Most individuals feel a strong desire to move their body when listening to music with a moderate amount of rhythmic complexity, whereas low and high amounts of rhythmic complexity decrease the desire to move (Matthews et al., 2019; Witek et al., 2014). Matthews and colleagues (2019) additionally investigated the influence of harmonic complexity on the sensation of groove and found that wanting to move ratings were similar for low and moderately complex harmonies, but dropped for a highly complex harmony. The present study tests whether these effects of rhythmic and harmonic complexity can be replicated with a subset of 9 stimuli from the original set of 54 stimuli used by Matthews and colleagues (2019). In line with previous research by Matthews et al. (2019) and Witek et al. (2014), groove ratings followed an inverted U-shape when plotted against rhythmic complexity. The strongest sensation of groove was reported for patterns with a moderate amount of rhythmic complexity, followed by low and high rhythmic complexity. The manipulation of harmonic complexity also led to similar results as in Matthews et al. (2019): Groove ratings were highest for low harmonic complexity followed by moderate and high harmonic complexity.

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