Early mindreading scale: From joint attention to false-belief understanding

The current research aims at constructing a developmentally sensitive mindreading scale (i.e., battery of tasks measuring different aspects ability in children from 1 to 3.5 years age). Over 300 Polish were tested six-month intervals with 48 designed measure (for total six measurement occasions, T1-T6; NT1 = 357; MageT1 52,30 weeks; SD 1,73; 201 (56%) boys, 156 (44%) girls). Using latent trait modelling, factor was established. Support found for satisfactory reliability the that ultimately consisted 31 tasks. age-matched, as information curves factors each age ranges and composite constructs mostly acceptable. validity also confirmed using correlational analyses, continuous development observed over ranges: joint attention, through gestures communication visual perspective taking, false-belief understanding. proposed is suitable use investigation general pattern of, individual differences in, ability.