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Table 1 Average P + for the blocks in the MCBS

From: Using response time to investigate students' test-taking behaviors in a NAEP computer-based study

Stage Block Number of items Average P+
Stage 1 Router 1 17 0.57
Router 2 17 0.59
Stage 2 Easy 16 0.77
Medium 16 0.56
Hard 16 0.36