4.3. Effect of the Amount of Visual Information

The main effect of group was significant, with patients’ performance improving to a greater extent than healthy participants’ when increasing the amount of visual information (F(1,191)=4.12, p=.04). We did not find any significant main effect of the Type of intention (F(3,191)=2.6, p>.05). However, a significant interaction effect between group and Type of intention was obtained (F(3,191)=6.12, p<.001): in non-social conditions, patients’ response was equally (motor), if not less (superordinate), affected than controls’ one by varying the amounts of visual information (LSD test: p=.03), while in social conditions, they relied significantly more on these amounts than healthy (LSD tests, both tasks: all p<.005) (figure 5).

Fig. 5. Effect of the Amount of Visual Information (%) for all types of intention considered. The greater this score, the more participants’ performance are sensitive to increasing the amounts of visual information.

Fig. 6. Both groups:Biaseffect for the 3 amounts of visual information considered (low, moderate, high), across all types of intention. Between-group differences marked with *= p<.05, or **= p<.01.

Fig. 7. Both groups: effect of the Amount of Visual Information on inferring non-biased and biased intentions, across all conditions. Between-group differences marked with *= p<.05, or **= p<.01.