The name is absent

symbolic play between 6-24m____________________________________________________

Phagava et al. (2008);

Esposito et al. (2009)_________

18

0-5m

^TD

Abnormal fidgety movements and lower levels of movement/motor symmetry in autism

group__________________________________________________________________________

Clifford et al. (2007)

15

12-24m

ID/LD, TD

Reduced eye contact, response to name and anticipatory gestures compared to ID/LD

group__________________________________________________________________________

Clifford & Dissanayake

(2008)_____________________

22

0-24m

^TD

Impairments in gaze and affect in first 6m; impairments in joint attention behaviors
during second year_________________________________________________________________

Ozonoff et al. (2008)

54

0-24m

ASD with and
without regression;

ID, TD___________

Autism and ID show delay in motor milestones compared to TD; Motor abnormalities
when sitting and prone and lack of protective response seen in ID but not autism group