2.3. ‘Bias effect’: between-experiment comparisons

2.3.1. Analyses

Finally, some analyses were conducted to directly assess whether the contribution of prior knowledge to the inference of an intention depended upon the target (motor vs. superordinate) and the scope (non-social vs. social) of the intention. Student tests were first conducted on the overall performance in the bias session between the motor experiments and the superordinate ones, and between the non-social experiments and the social ones. Second, the bias effects for each dimension (scope and target) were compared with each other. A score reflecting that effect for each type of intention (motor, superordinate, social, non-social intention) was calculated by subtracting, in each experiment, participants’ hit rate for the preferred intention to the hit rate for the non-preferred intentions. The resulting scores were then entered in a 2 (motor vs. superordinate) x 2 (social vs. non-social) x 3 (amounts of information) factorial ANOVA.