Construct: Engagement; three dimensional model including physical, emotional, and cognitive engagement. Validation including CFA and discriminant/convergent analyses, as well as incremental validity in predicting task performance and citizenship behavior relative to other scales.
Reference: Rich, B. L., Lepine, J. A., & Crawford, E. R. (2010). Job engagement: Antecedents and effects on job performance. Academy of management journal,53(3), 617-635.