title: Bias in visual attention behavior in a normal school-aged population.
abstract: Hemi-field visual-spatial attention was studied on a timed letter cancellation task in proficient readers from 7th to 9th grades. Participants maintained greater accuracy in identifying targets in the left quadrants (top/bottom) when compared with the right quadrants (top/bottom), revealing a leftward bias in their responses. Effects of gender and age were evident on performance; females scored significantly higher than males, and 9th graders scored significantly higher than 7th and 8th graders. Thus, a substantial shift in brain maturation may take place from 8th to 9th grades or from the ages of 13.0 to 14.11. Discriminative characteristics of the task are analyzed by assigning greater value to targets located in the top left quadrant. The 9th graders, as compared to the younger students, and the girls, as compared to the boys, evidenced a reading-direction-related bias toward systematic preference for the upper-left to lower-right quadrants.
authors.affiliation: Facultad de Psicologia, Universidad de La Habana, Havana, Cuba. cairo@psico.uh.cu
authors.forename: Eduardo
authors.initials: E
authors.lastname: Cairo Valcarcel
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Ijalba
authors.forename: Loraine K
authors.initials: LK
authors.lastname: Obler
authors.forename: Rosalba
authors.initials: R
authors.lastname: Gomez Lozano
authors.forename: Rusella
authors.initials: R
authors.lastname: Marin Llanes
authors.forename: Carmenza
authors.initials: C
authors.lastname: Devia Collazos
authors.forename: Carlos
authors.initials: C
authors.lastname: Bouza Herrera
mesh_terms: D000367:Age Factors; D001288:Attention / Q000502:physiology*; D002648:Child; D004192:Discrimination, Psychological; D005260:Female; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D008297:Male; D012737:Sex Factors; D013028:Space Perception / Q000502:physiology*; D014794:Visual Fields / Q000502:physiology; D014796:Visual Perception / Q000502:physiology*