The maintenance of attention on moving objects is required for cognition to reliably engage with the visual world. Theories of object tracking need to explain on which patterns of visual stimulation one can easily maintain attention and on which patterns one cannot. A previous study has shown that it is easier to track rigid objects than objects that expand and contract along their direction of motion, in a manner that resembles a substance pouring from one location to another (vanMarle and Scholl 2003 Psychological Science14 498–504). Here we investigate six possible explanations for this finding and find evidence supporting two of them. Our results show that, first, objects that expand and contract tend to overlap and crowd each other more, and this increases tracking difficulty. Second, expansion and contraction make it harder to localize objects, even when there is only a single target to attend to, and this may also increase tracking difficulty. Currently, there is no theory of object tracking that can account for the second finding.
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References
1.
AlvarezG AFranconeriS L, 2007“How many objects can you track? Evidence for a resource-limited attentive tracking mechanism”Journal of Vision7(13):14, 1–10.
2.
AlvarezG ASchollB J, 2005“How does attention select and track spatially extended objects? New effects of attentional concentration and amplification”Journal of Experimental Psychology: General134461–476.
3.
BehrmannMZemelR SMozerM C, 1998“Object-based attention and occlusion: Evidence from normal participants and a computational model”Journal of Experimental Psychology: Human Perception and Performance241011–1036.
CavanaghPAlvarezG A, 2005“Tracking multiple targets with multifocal attention”Trends in Cognitive Sciences9349–354.
8.
CheriesE WMitroffS RWynnKSchollB J, 2008“Cohesion as a constraint on object persistence in infancy”Developmental Science11427–432.
9.
CousineauD, 2005“Confidence intervals in within-subject designs: A simpler solution to Loftus and Masson's method”Tutorial in Quantitative Methods for Psychology142–45.
10.
CulhamJ CBrandtS ACavanaghPKanwisherN GDaleA MTootellR B, 1998“Cortical fMRI activation produced by attentive tracking of moving targets”Journal of Neurophysiology802657–2670.
11.
CulhamJ CCavanaghPKanwisherN G, 2001“Attention response functions: Characterizing brain areas using fMRI activation during parametric variations of attentional load”Neuron32737–745.
12.
De ValoisR LDe ValoisK K, 1991“Vernier acuity with stationary moving Gabors”Vision Research311619–1626.
13.
EglyRDriverJRafalR D, 1994“Shifting visual attention between objects and locations: Evidence from normal and parietal lesion subjects”Journal of Experimental Psychology: General123161–177.
14.
ErlikmanGKeaneB PMettlerEHorowitzT SKellmanP J, in press, “Automatic feature-based grouping during multiple object tracking”Journal of Experimental Psychology: Human Perception and Performance.
15.
FeldmanJ, 2007“Formation of visual ‘objects’ in the early computation of spatial relations”Perception & Psychophysics69816–827.
16.
FencsikD EKliegerS BHorowitzT S, 2007“The role of location and motion information in the tracking and recovery of moving objects”Perception & Psychophysics69567–577.
17.
FeriaC S, 2008“The distribution of attention within objects in multiple-objects scenes: Prioritization by spatial probabilities”Perception & Psychophysics701185–1196.
18.
FeriaC S, 2013“Speed has an effect on multiple-object tracking independently of the number of close encounters between targets and distractors”Attention, Perception, & Psychophysics7553–67.
19.
FleetD JWagnerHHeegerD J, 1996“Neural encoding of binocular disparity: Energy models, position shifts and phase shifts”Vision Research361839–1857.
20.
FranconeriS LAlvarezG ACavanaghP, 2013“Flexible cognitive resources: Competitive content maps for attention and memory”Trends in Cognitive Sciences17134–141.
21.
FranconeriS LSimonsD J, 2003“Moving and looming stimuli capture attention”Perception & Psychophysics65999–1010.
22.
FranconeriSSumeethJScimecaJ, 2010“Tracking multiple objects is limited only by object spacing, not speed, time or capacity”Psychological Science21920–925.
23.
GibsonJ JKaplanG AReynoldsJ HWheelerK, 1969“The change from visible to invisible: A study of optical transitions”Perception & Psychophysics5113–116.
24.
HesposS JvanMarleK, 2012“Physics for infants: Characterizing the origins of knowledge about objects substances, and number”Wiley Interdisciplinary Reviews: Cognitive Science319–27.
25.
HildrethEKochC, 1987“The analysis of visual motion: From computational theory to neuronal mechanisms”Annual Review of Neuroscience10477–533.
26.
HolcombeA OChenW-Y, 2013“Splitting attention reduces temporal resolution from 7 Hz for tracking one object to <3 Hz when tracking three”Journal of Vision13(1):12, 1–19.
27.
HornB K PSchunkB G, 1981“Determining optical flow”Artificial Intelligence17185–203.
28.
HorowitzT SBirnkrantR SFencsikD ETranLWolfeJ M, 2006“How do we track invisible objects?”Psychonomic Bulletin & Review13516–523.
29.
HorowitzT SCohenM A, 2010“Direction information in multiple object tracking is limited by a graded resource”Attention, Perception, & Psychophysics721765–1775.
30.
HoweP DHolcombeA O, 2012“Motion information is sometimes used as an aid to the visual tracking of objects”Journal of Vision12(13):10, 1–10.
31.
HoweP DHorowitzT SMoroczI AWolfeJ MLivingstoneM S, 2009“Using fMRI to distinguish components of the multiple object tracking task”Journal of Vision9(4):10, 1–11.
32.
HoweP DIncledonN CLittleD R, 2012“Can attention be confined to just part of a moving object? Revisiting target-distractor merging in multiple object tracking”PLoS ONE7(7) e41491.
33.
Huntley-FennerGCareySSolimandoA, 2002“Objects are individuals but stuff doesn't count: Perceived rigidity and cohesiveness influence infants' representations of small groups of discrete entities”Cognition85203–221.
34.
IntriligatorJCavanaghP, 2001“The spatial resolution of visual attention”Cognitive Psychology43171–216.
35.
JovicichJPetersR JKochCBraunJChangLErnstT, 2001“Brain areas specific for attentional load in a motion-tracking task”Journal of Cognitive Neuroscience131048–1058.
36.
KazanovichYBorisyukR, 2006“An oscillatory neural model of multiple object tracking”Neural Computation181413–1440.
37.
KeaneB PMettlerETsoiVKellmanP J, 2011“Attentional signatures of perception: Multiple object tracking reveals the automaticity of contour interpolation”Journal of Experimental Psychology: Human Perception and Performance37685–698.
38.
KunarM ACarterRCohenMHorowitzT S, 2008“Telephone conversation impairs sustained visual attention via a central bottleneck”Psychonomic Bulletin & Review151135–1140.
39.
LaBergeD, 1983“Spatial extent of attention to letters and words”Journal of Experimental Psychology: Human Perception and Performance9371–379.
40.
LennieP, 2003“The cost of cortical computation”Current Biology13493–497.
41.
LorenceauJShiffrarMWellsNCastetE, 1993“Different motion sensitive units are involved in recovering the direction of moving lines”Vision Research331207–1217.
42.
MarinoA CSchollB J, 2005“The role of closure in defining the ‘objects’ of object-based attention”Perception & Psychophysics671140–1149.
43.
MarrD, 1982Vision (New York: W H Freeman & Co).
44.
MarrDUllmanS, 1981“Directional selectivity and its use in early visual processing”Proceedings of the Royal Society of London, Series B211151–180.
45.
MitroffS RSchollB JWynnK, 2004“Divide and conquer: How object files adapt when a persisting object splits into two”Psychological Science15420–425.
46.
MooreC MYantisSVaughanB, 1998“Object-based visual selection: Evidence from perceptual completion”Psychological Science9104–110.
47.
MoreyR D, 2008“Confidence intervals from normalized data: A correction to Cousineau (2005)”Tutorial in Quantitative Methods for Psychology461–64.
48.
NishidaSJohnstonA, 1999“Influence of motion signals on the perceived position of spatial pattern”Nature397610–612.
49.
OksamaLHyonaJ, 2008“Dynamic binding of identity and location information: A serial model of multiple identity tracking”Cognitive Psychology56237–283.
50.
PalmerSRockI, 1994“Rethinking perceptual organization: The role of uniform connectedness”Psychonomic Bulletin & Review129–55.
51.
PelliD G, 1997“The VideoToolbox software for visual psychophysics: Transforming numbers into movies”Spatial Vision10437–442.
52.
PelliD GTillmanK A, 2008“The uncrowded window of object recognition”Nature Neuroscience111129–1135.
53.
PosnerM I, 1980“Orienting of attention”Quarterly Journal of Experimental Psychology323–25.
54.
PylyshynZ WStormR W, 1988“Tracking multiple independent targets: Evidence for a parallel tracking mechanism”Spatial Vision3179–197.
55.
Reuter-LorenzP ADrainMHardy-MoraisC, 1996“Object-centered attentional biases in the intact brain”Journal of Cognitive Neuroscience8540–550.
56.
SchollB J, 2001“Objects and attention: The state of the art”Cognition801–46.
57.
SchollB J, 2009“What have we learned about attention from multiple object tracking (and vice versa)?”, in Computation, Cognition, and Pylyshyn Eds DedrickDTrickL, (Cambridge, MA: MIT Press) pp 49–78.
58.
SchollB JPylyshynZ WFeldmanJ, 2001“What is a visual object: Evidence from target-merging in multiple-object tracking”Cognition80159–177.
59.
ShoonerCTripathyS PBedellH EÖğmenH, 2010“High-capacity, transient retention of direction-of-motion information for multiple moving objects”Journal of Vision10(6):8, 1–20.
60.
SimonT JHesposS JRochatP, 1995“Do infants understand simple arthimetic? A replication of Wynn (1992)”Cognitive Development10253–269.
61.
SnowdenR, 1998“Shifts in perceived position following adaptation to visual motion”Current Biology81343–1345.
62.
St. ClairRHuffMSeiffertA E, 2010“Conflicting motion information impairs mulitiple object tracking”Journal of Vision10(4):18, 1–13.
63.
St. ClairRSeiffertA E, 2011“Misrepresentation of motion direction causes prediction errors in multiple object tracking”Journal of Vision11(11) 291 (abstract), doi:10.1167/11.11.291.
64.
SuganumaMYokosawaK, 2006“Grouping and trajectory storage in multiple object tracking: Impairments due to common item motions”Perception35483–495.
65.
TipperS PBehrmannM, 1996“Object-centered not scene-based visual neglect”Journal of Experimental Psychology: Human Perception and Performance221261–1278.
66.
TreismanA MGeladeG, 1980“A feature-integration theory of attention”Cognitive Psychology1297–136.
67.
vanMarleKSchollB J, 2003“Attentive tracking of objects versus substances”Psychological Science14498–504.
68.
vanMarleKWynnK, 2011“Tracking and quantifying objects and non-cohesive substances”Developmental Science14502–515.
69.
von MuhlenenALlerasA, 2007“No-onset looming motion guides spatial attention”Journal of Experimental Psychology: Human Perception and Performance331297–1310.
70.
VulEFrankM CTenenbaumJ BAlvarezG, 2010“Explaining human multiple object tracking as resource-constrained approximate inference in a dynamic probabilistic model”Advances in Neural Information Processing Systems221–9.
71.
WhitneyD, 2002“The influence of visual motion on perceived position”Trends in Cognitive Sciences6211–216.
72.
WynnK, 1992“Addition and subtraction by human infants”Nature358749–750.
73.
YantisS, 1992“Multielement visual tracking: Attention and perceptual organization”Cognitive Psychology24295–340.
74.
ZhouKLuoHZhouTChenL, 2010“Topological change disturbs object continuity in attentive tracking”Proceedings of the National Academy of Sciences of the USA10721920–21924.
