title: Can the focus of attention accommodate multiple, separate items?
abstract: Researchers of working memory currently debate capacity limits of the focus of attention, the proposed mental faculty in which items are most easily accessed. Cowan (1999) suggested that its capacity is about 4 chunks, whereas others have suggested that its capacity is only 1 chunk. Recently, Oberauer and Bialkova (2009) found evidence that 2 items could reside in the focus of attention, but only because they were combined into a single chunk. We modified their experimental procedure, which depends on a pattern of switch costs, to obtain a situation in which chunking was not likely to occur (i.e., each item remained a separate chunk) and still obtained results consistent with a capacity of at least 2 items. Therefore, either the focus of attention can hold multiple chunks or the switch cost logic must be reconsidered.
authors.affiliation: Department of Psychological Sciences, University of Missouri, Columbia, MO 65211, USA. algkb8@mail.mizzou.edu
authors.forename: Amanda L
authors.initials: AL
authors.lastname: Gilchrist
authors.forename: Nelson
authors.initials: N
authors.lastname: Cowan
mesh_terms: D000704:Analysis of Variance; D001245:Association Learning / Q000502:physiology; D001288:Attention / Q000502:physiology*; D003118:Color Perception / Q000502:physiology; D005260:Female; D006801:Humans; D008297:Male; D008570:Memory, Short-Term / Q000502:physiology*; D010364:Pattern Recognition, Visual; D010775:Photic Stimulation; D011930:Reaction Time; D012691:Serial Learning; D013334:Students; D014495:Universities