Almoqbel FM, et al. – This study entailed an assessment of the development of visual acuity (VA) and contrast sensitivity in children as measured with objective (sweep visually evoked potential) and subjective, psychophysical techniques, including signal detection theory (SDT), which attempts to control for differences in criterion or behavior between adults and children. The possibility of applying SDT methods with children was also explored. A slightly later development of VA and contrast sensitivity (8 years or older) was ascertained, based on the yielded data. It suggested the significance of using SDT or forced–choice procedures in any developmental study to overcome the effect of criterion in children