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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.