The exception was the scale used to measure growth mindset, which had an internal reliability coefficient of 0.7, somewhat below the commonly used benchmark for acceptable reliability of 0.8. (educationnext.org)
Item 4 was reverse - coded, and a mean score of the six items (Cronbach's alpha = 0.67, indicating acceptable reliability) was computed and divided into thirds of low, medium and high parental supervision. (gov.scot)
The scale showed acceptable reliability (all r's >.70) and validity through appropriately high correlations with marital satisfaction and anger (Fincham & Bradbury, 1992). (interpersona.psychopen.eu)