Table 1.

Inclusion and exclusion criteria of the study

Inclusion Criteria

Age from five months to two years

Score less than 1.5 SD below the mean for their corrected age on the peabody Gross Motor Scales

Sitting skills

Head control such that when trunk is supported at the mid-trunk, head is maintained for over one minute without bobbing Infant can track an object across midline without losing head control Infant may prop hands on floor or legs to lean on arms, but should not be able to reach and maintain balance in the prop sit position When supported in sitting can reach for toy Can prop on elbows in the prone position for at least 30 seconds

Exclusion Criteria

Age over two years

Score greater than 1.5 SD below the mean for their corrected age on Peabody Gross Motor Scale

Diagnosed visual impairment

Diagnosed hip dislocation or subluxation greater than 50%