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Table 2 Reliability and item analysis for identity scales—engineering (phase 4)

From: Development and validation of the role identity surveys in engineering (RIS-E) and STEM (RIS-STEM) for elementary students

Scales

n

No. items

α

α if deleted

pbis range

Competence

192

7

.818

None

.48–.62

Interest

180

7

.883

None

.57–.79

Self-recognition

179

6

.921

None

.72–.84

Recognition by others

179

6

.901

None

.61–.81

  1. pbis range represents the point biserial correlation between the item in question and the total scale score. The ranges presented here are across all items within a scale
  2. α Cronbach’s alpha estimate