Multiple-object tracking in children: The “Catch the Spies” task
Section snippets
Participants
The 97 participants were from five age groups: 6, 8, 10, 12, and 19 years (see Table 1). The children were from a local school whereas the 19-year-old participants were from the university participant-pool. Data from participants diagnosed with visual or attentional learning disabilities were excluded from these analyses, as were data from participants who had failed a grade.
Apparatus and materials
Testing was done on Macintosh G4 PowerBooks that had 21.5 cm × 32.5 cm viewing screens. The tracking field (the area in which
Results
The dependent measure was the percentage of accurately identified targets. Thus, in a given trial, if a participant only identified three of the four targets that they were required to track, their accuracy would be 75%. Accuracy was measured as a function of age (6, 8, 10, 12 and 19 years) and number of targets (one to four). Because no main effects or interactions involving the sex of the participant emerged (F < 1 for all), data for males and females were combined.
Participants of all ages
Discussion
This study shows that age has significant effects on tracking performance in the 10 item “Catch the Spies” task, and the effects are particularly pronounced when there are three or four targets. This study also provides preliminary evidence that performance in the “Catch the Spies” task may be related to reported experience with real-life visual-motor tasks such as playing action-videogames and sports. However, before firm conclusions can be made this association needs to be replicated,
Acknowledgements
This project was supported by a grant from the Natural Sciences and Engineering Research Council of Canada (238641-01). We would like to thank the following individuals: Jim Enns, Mary Ann Evans, and Zenon Pylyshyn for early discussions on the feasibility of this project (and ducks in disguise!); Brian Scholl for software consultation and helpful comments on an earlier draft of the paper; Ernest Dalrymple-Alford, Ian Newby-Clark and Christopher Roney for statistical and editorial advice; and
References (36)
- et al.
Infants’ knowledge of objects: Beyond object files and object tracking
Cognition
(2001) - et al.
Delays of retention, processing efficiency, and attentional resources in working memory span development
Journal of Memory and Language
(2004) - et al.
Attentional resolution
Trends in Cognitive Sciences
(1997) - et al.
The development of selective attention: A lifespan overview
Acta Psychologica
(1994) Visual indexes, preconceptual objects, and situated vision
Cognition
(2001)- et al.
Tracking multiple items through occlusion: Clues to objecthood
Cognitive Psychology
(1999) - et al.
Life-span changes in attention: The visual search task
Cognitive Development
(1998) - et al.
Individuation of objects and events: A developmental study
Cognition
(2003) Multi-element visual tracking: Attention and perceptual organization
Cognitive Psychology
(1992)- et al.
Attention and expertise in multiple-target tracking.
Applied Cognitive Psychology
(2004)