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Table 1 Summary of the identity exploratory factor analysis

From: Science and mathematics teacher communities of practice: social influences on discipline-based identity and self-efficacy beliefs

Factora

No. of items

Variance explained (%)

αb

Questionnaire items

Identity overall

13

63.1

0.868

All of below

 1. SI: Self-image

6

29.0

0.893

13, 14, 15, 16, 17, 18

 2. CA: Community action

3

13.2

0.756

3, 4, 5

 3. SR: Social respectc

2

10.8

0.756

10, 11

 4. CV: Community value c

2

10.1

0.727

6, 7

  1. aItems 1, 2, 8, 9, and 12 were deleted due to low factor loadings or mixed loadings. Sample: n = 165
  2. bCronbach’s alpha coefficient: > 0.9 excellent; > 0.8 good; > 0.7 acceptable
  3. cFactors with only two items were further analyzed. Pearson correlation for two items in SR is 0.609, p value < .001, for two items in CV is 0.574, p value < .001. Spearman-Brown coefficient for SR is 0.757, for CV is 0.729