*3.4. Effectiveness of Doll Therapy on Behaviour*

Four out of seven studies [20,29,30,32] reported a reduction in SCPD, observing the decrease of disruptive and aggressive behaviors. The participants were less agitated and irritable while holding the doll (Cantarella Mdiff: −0.025, *p* < 0.001; Shin: *t* = 16.31, *p* < 0.01; Balzotti *z* = 2.66, *p* < 0.007). They verbalized fewer swear words, fewer shouts, and fewer obsessive behaviors. Three studies [20,30,32] found a higher number of interactions with the environment, increasing social contact and verbalization (*t* = −8.41, *p* < 0.01). The episodes of erratic wandering decreased in two of the studies (Shin, *t*: −17.46, *p* < 0.001) [20,33]. Only one study [29] did not report significant evidence in reducing anxiety, agitation, and aggressiveness (Moyle, *p* < 0.88)
