Testing devices research

A recent report summarized research about the impact of devices on students' online standardized testing performance. "Device effects" are a real threat to test-score comparability, the report concludes. From a practical standpoint, researchers say, the key to avoiding potential problems is to ensure that students have plenty of prior experience with whatever device they will ultimately use to take state tests.
Council of Chief State School Officers. (2016). Score Comparability Across Computerized Assessment Delivery Devices. Washington, DC: Council of Chief State School Officers.
http://www.ccsso.org/Resources/Publications/Score_Comparability_across_Computerized_Assessment_Delivery_Devices.html