Table 3 Characteristics of the CMAI-SF items
Item summary | Mean (SD) | Item difficulty | Discrim-inatory power (Total Score)a | Discrim-inatory power (Factor)b | Cronbach’s alpha “if item deleted” (Total score)a | Cronbach’s alpha “if item deleted” (Factor)b |
|---|---|---|---|---|---|---|
Factor 1 (aggressive behavior) | ||||||
Item 4: other aggressive behaviours or self abuse including: intentional falling, making verbal or physical sexual advances, eating/ drinking/ chewing inappropriate substances, hurt self or other | 1.07 (0.32) | .02 | .43 | .62 | .84 | .71 |
Item 2: hitting, kicking, pushing, biting, scratching, aggressive spitting | 1.13 (0.50) | .04 | .54 | .71 | .84 | 64 |
Item 3: grabbing onto people, throwing things, tearing things, or destroying property | 1.16 (0.58) | .04 | .54 | .60 | .83 | .67 |
Item 12: strange noises (weird laughter or crying) | 1.09 (0.42) | .02 | .47 | .50 | .84 | .72 |
Item 1: cursing/verbal aggression | 1.64 (1.00) | .17 | .46 | .50 | .84 | .80 |
Factor 2 (verbally agitated behavior) | ||||||
Item 9: constant request for attention or help | 1.70 (1.16) | .18 | .50 | .57 | .84 | .70 |
Item 10: repetitive sentences, calls, questions, or words | 1.52 (1.09) | .14 | .49 | .60 | .84 | .69 |
Item 11: complaining, negativism, refusal to follow directions | 1.54 (0.96) | .14 | .62 | .56 | .83 | .70 |
Item 6: general restlessness, performing repetitious mannerisms, tapping, strange movements | 1.34 (0.90) | .09 | .61 | .51 | .83 | .72 |
Item 14: screaming | 1.18 (0.64) | .05 | .48 | .44 | .84 | .75 |
Factor 3 (physically non-aggressive behavior) | ||||||
Item 7: inappropriate dress or disrobing | 1.34 (0.88) | .09 | .53 | .66 | .83 | .59 |
Item 13: hiding things, hoarding things | 1.45 (0.93) | .12 | .37 | .43 | .84 | .72 |
Item 8: handling things inappropriately | 1.31 (0.75) | .08 | .55 | .54 | .83 | .67 |
Item 5: pace, aimless wandering, trying to get to a different place (e.g. out of the room/building) | 1.49 (1.08) | .13 | .55 | .50 | .83 | .70 |