Table 3

Web-CAT for item-selection and response-history reports

Step

Item difficulty

Prob.

Your response

Expected score

Estimated ability

Standard error

Outfit MNSQ


1

0.50

0.17

0

0.80

0.50

-

-

2

1.75

0.06

0

0.32

0.50

-

-

3

-0.46

0.35

1

1.57

0.50

-

-

4

2.73

0.02

2*

0.26

0.50

0.73

2.12

5

-1.03

0.49

0*

1.84

-5.48

0.65

1.71

6

1.18

0.09

1

0.44

-1.55

0.62

2.88

7

1.03

0.11

1

0.49

-0.33

0.57

2.25

8

-0.96

0.47

2

1.82

0.35

0.54

2.73

9

-0.87

0.45

2

1.79

0.41

0.51

2.33

10

-0.68

0.40

2

1.70

-1.08

0.48

1.82


A * indicates a significantly unexpected response (p < .05). In reference to the expected score in column 5, these should be responded to with 2 and 0 in steps 4 and 5 according to the job satisfaction level of -1.08 logits in step 10. Website available at: http://www.healthup.org.tw/irt_test4/irt_start.htm webcite

Chien et al. BMC Medical Research Methodology 2011 11:47   doi:10.1186/1471-2288-11-47

Open Data