Perceptual Grouping Affects Haptic Enumeration Over the Fingers

Overvliet, Krista; Plaisier, Myrthe A.

doi:10.1177/0301006615594958

Cited by 9 publications

(5 citation statements)

References 35 publications

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“…Indeed, spatially separated clusters, or ensembles, are treated as one individual object (Eisinger et al, 2012), thereby facilitating behavioral performance. Similar facilitation from grouping can also be observed in haptics (Overvliet and Plaisier, 2016). This facilitation from spatial arrangement, even when set size is controlled for, possibly suggests facilitation in visual rapid categorization, which is consistent with suggestion of Trick and Pylyshyn (1994) that subitizing starts as early as the preattentive stage.…”

Section: Introductionsupporting

confidence: 83%

Effect of Non-canonical Spatial Symmetry on Subitizing

Hsin

Tseng³

2021

Front. Psychol.

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Subitizing refers to ability of people to accurately and effortlessly enumerate a small number of items, with a capacity around four elements. Previous research showed that “canonical” organizations, such as familiar layouts on a dice, can readily improve subitizing performance of people. However, almost all canonical shapes found in the world are also highly symmetrical; therefore, it is unclear whether previously reported facilitative effect of canonical organization is really due to canonicality, or simply driven by spatial symmetry. Here, we investigated the possible effect of symmetry on subitizing by using symmetrical, yet non-canonical, shape structures. These symmetrical layouts were compared with highly controlled random patterns (Experiment 1), as well as fully random and canonical patterns (Experiment 2). Our results showed that symmetry facilitates subitizing performance, but only at set size of 6, suggesting that the effect is insufficient to improve performance of people in the lower or upper range. This was also true, although weaker, in reaction time (RT), error distance measures, and Weber Fractions. On the other hand, canonical layouts produced faster and more accurate subitizing performances across multiple set sizes. We conclude that, although previous findings mixed symmetry in their canonical shapes, their findings on shape canonicality cannot be explained by symmetry alone. We also propose that our symmetrical and canonical results are best explained by the “groupitizing” and pattern recognition accounts, respectively.

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Section: Introductionsupporting

confidence: 83%

Effect of Non-canonical Spatial Symmetry on Subitizing

Hsin

Tseng³

2021

Front. Psychol.

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“…In that case, counting is used also for the smallest numerosities. In a recent haptic study, it was found that spatially grouping items also facilitated numerosity judgment for stimuli that cannot be subitized [11]. This is an example that grouping of items can also facilitate numerosity judgment due to other reasons than the occurrence of subitizing.…”

Section: Introductionmentioning

confidence: 92%

Representing Numerosity Through Vibration Patterns

Plaisier

Holt

Kappers

2020

IEEE Trans. Haptics

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It can be useful to display information about numerosity haptically. For instance, to display the time of day or distances when visual or auditory feedback is not possible or desirable. Here we investigated the possibility of displaying numerosity information by means of a sequence of vibration pulses. From previous studies on numerosity perception in vision, haptics and audition it is known that numerosity judgment can be facilitated by grouping. Therefore, we investigated whether perception of the number of vibration pulses in a sequence can be facilitated by temporally grouping the pulses. We found that indeed temporal grouping can lead to considerably smaller errors and lower error rates indicating that this facilitated the task, but only when participants knew in advance whether the pulses would be temporally grouped. When grouped and ungrouped series of pulses were presented randomly interleaved, there was no difference in performance. This means that temporally grouping vibration sequences can allow the sequence to be displayed at a faster rate while it remains possible to perceive the number of vibration pulses accurately if the users is aware of the temporal grouping.

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“…Miller once referred to the number 7-the capacity of working memory, as if he was Bpersecuted by an integer^(p. 81). He suggested that the capacity of information processing in immediate memory is affected by the ability to group inputs into familiar units, or Bchunks.^Inspired by Miller, we suggest that the span of attention is limited to a specific range, but an item can be more than a single stimulus due to learning or familiarity; as high as 18 random dots that were trained (Wolters et al, 1987) and 6 (3 in each hand) spheres were perceptually grouped (Overvliet & Plaisier, 2016). Thus, we suggest that, although limited, there is no specific integer to represent attention capacity.…”

Section: Discussionmentioning

confidence: 83%

If it looks, sounds, or feels like subitizing, is it subitizing? A modulated definition of subitizing

2019

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Research in cognitive psychology has focused mainly on the visual modality as the input interface for mental processes. We suggest that integrating studies from different modalities can aid in resolving theoretical controversies. We demonstrate this in the case of subitizing. Subitizing, the quick and accurate enumeration of small quantities, has been studied since the 19th century. Nevertheless, to date, the underlying mechanism is still debated. Two mechanisms have been suggested: a domain-general mechanism-attention, and a domain-specific mechanism-pattern recognition. Here, we review pivotal studies in the visual, tactile, and auditory modalities. The accumulative findings shed light on the theoretical debate. Accordingly, we suggest that subitizing is a subprocess of counting that occurs in the presence of facilitating factors, such as attentional resources and familiar patterns.

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Perceptual Grouping Affects Haptic Enumeration Over the Fingers

Cited by 9 publications

References 35 publications

Effect of Non-canonical Spatial Symmetry on Subitizing

Effect of Non-canonical Spatial Symmetry on Subitizing

Representing Numerosity Through Vibration Patterns

If it looks, sounds, or feels like subitizing, is it subitizing? A modulated definition of subitizing

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