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Table 1 Key parameters from the Rasch analyses

From: DIF as a pedagogical tool: analysis of item characteristics in ICILS to understand what students are struggling with

  # of items # of cases Deviance EAP-reliability # ICILS DIF # DIF B # DIF C
International 62 8000 298,222.10 0.90    
Norway 62 7500 + 500 297,839.48 0.90 9 6 14
Germany 61 7500 + 500 297,838.64 0.90 7 6 14
Denmark 62 7500 + 500 297,659.42 0.90 9 9 18
  1. Number of cases is 8000 in all analyses. In the DIF-analyses 500 students from the country under investigation and 7500 students from other countries are included