reliability for this data

Unidimensional Reliability Frequentist Scale Reliability Statistics 95% Cl Coefficient Estimate Std. Error Lower Upper Coefficient a 0.893 0.022 0.850 0.935 Frequentist Individual Item Reliability Statistics Coefficient a (if item dropped) Item Estimate Lower 95% Cl Upper 95% Cl harsh words or insults 0.816 0.729 0.904 verbally aggressive 0.814 0.737 0.892 verbally lashes out 0.902 0.845 0.959