Spatial frequencies as a medium for guiding attention: Comment on Lamb, Yund, and Pond (1999)

M. R. Lamb, E. W. Yund, and H. M. Pond (1999) question L. C. Robertson's (1 996) earlier arguments that attention can be guided by spatial frequencies when searching for a target in complex visual patterns. The 2 major finding s they report to argue against Robertson's conclusions are discussed and fo und inadequate for the purposes of abandoning this hypothesis. Instead, fin dings reported in the accompanying article in combination with previous fin dings reported by 2 of the same authors (M. R. Lamb & E. W. Yund, 1996) pro vide converging evidence to support spatial frequency as a medium for guidi ng attention.