Screening approaches for determining the language of assessment for dual language learners: Evidence from Head Start and a universal preschool initiative

•Large-scale research studies face challenges assessing DLLs.•We examine performance of the preLAS and preferred language on EOWPVT-SBE for language routing.•The preLAS differentiates scores on other measures but is not a Guttman scale.•Preferred language on EOWPVT-SBE differentiates scores on other measures and could be used for routing.