کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
926481 | 921870 | 2011 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Subitizing reflects visuo-spatial object individuation capacity Subitizing reflects visuo-spatial object individuation capacity](/preview/png/926481.png)
Subitizing is the immediate apprehension of the exact number of items in small sets. Despite more than a 100 years of research around this phenomenon, its nature and origin are still unknown. One view posits that it reflects a number estimation process common for small and large sets, which precision decreases as the number of items increases, according to Weber’s law. Another view proposes that it reflects a non-numerical mechanism of visual indexing of multiple objects in parallel that is limited in capacity. In a previous research we have gathered evidence against the Weberian estimation hypothesis. Here we provide first direct evidence for the alternative object indexing hypothesis, and show that subitizing reflects a domain general mechanism shared with other tasks that require multiple object individuation.
► Subitizing may reflect a capacity limited mechanism for multiple object individuation.
► We compare capacity in enumeration and in visuo-spatial short term memory tasks.
► Capacity in the two tasks correlate across subjects and is reduced in dual task conditions.
► Results are predicted assuming a common mechanism for individuation.
Journal: Cognition - Volume 121, Issue 1, October 2011, Pages 147–153