The performance of 16 male observers who searched for an incomplete ring (Landolt C) among a number of solid rings in a square, moving field was measured. Search performance deteriorated as velocity or object density was increased; a target was more likely to be detected the closer it was to the center of the field; there was no significant correlation between the age of the observer and his search performance; there was significant correlation between foveal visual acuity and search performance in the moving field. The performance of the same observers on a previous series of tests is compared to their performance on the tests reported here. A hypothesis concerning the role of peripheral and foveal vision in searching for targets is advanced.
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
For “all targets,” r > 0.28 at the 0.05 level of significance, and r > 0.36 at the 0.01 level. For all other r’s in the table, with 16 targets, r > 0.496 at the 0.05 level, and r > 0.623 at the 0.01 level.
For “all targets,” r > 0.28 at the 0.05 level of significance, and r > 0.36 at the 0.01 level. For all other r’s in the table, with 16 targets, r > 0.496 at the 0.05 level, and r > 0.623 at the 0.01 level.