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Table 3 Item dimensionality test results using a Rasch analysis of 20 items of the ACCEPTANCE and INTENTION measures as well as 26 items applied by Astley and Francis ([2010])

From: Pre-service biology teachers’ acceptance of evolutionary theory and their preference for its teaching

  Rating scale model (RSM) Partial credit model (PCM)
No. of dimen-sions Deviance (no. of free parameters) AIC BIC Deviance (no. of free parameters) AIC BIC
  ACCEPTANCE and INTENTION measures
One 7428.821 (23) 7474.821 7548.131 6779.601 (74) 6927.601 7163.467
Two 6978.635 (25) 7028.635 7108.320 6302.884 (76) 6454.884 6697.125
  Measures of the affective domain (Astley and Francis [2010])
One 8833.168 (24) 8881.168 8957.799 8205.346 (78) 8361.346 8610.396
Two 8143.129 (26) 8195.129 8278.146 7543.131 (80) 7703.131 7958.568
Four 7773.438 (33) 7839.438 7944.805 7283.975 (87) 7457.975 7735.762
  1. Note. AIC = Akaike’s Information Criterion; BIC = Bayes’ Information Criterion.