Five participants of Unilateral main group, receive free-play and non-interventional activities during the first phase, followed by unilateral perceptual-motor exercises in the second phase of the experiment. This arm investigates the effects of Unilateral training and treatment order on manual dexterity and visuospatial memory in NVLD children.

Five participants of Unilateral main group, receive unilateral interventional activities during the first phase, followed by non-interventional and free-play activities in the second phase. This arm investigates the effects of Unilateral training and treatment order on manual dexterity and visuospatial memory in NVLD children.

Five participants of Bilateral main group, receive free-play and non-interventional activities during the first phase, followed by bilateral perceptual-motor exercises in the second phase of the experiment. This arm investigates the effects of Bilateral training and treatment order on manual dexterity and visuospatial memory in NVLD children.

The first 18 sessions (3 days per week) students took the unilateral (PM) exercise interventional training program, where they used only their left hand for participating in interventional training program. The second phase started after 18 sessions interventional exercises, with 6sessions (one session per week) of non-interventional , free-play, and self oriented activates.

Pre-test scores are obtained using the Box and Blocks Test (BBT) to assess right hand manual dexterity scores before the start of the experiment. After 24 sessions, when participants have completed both the interventional and non-interventional training programs in each group (e.g., unilateral and bilateral training groups), the Box and Blocks Test (BBT) is administered again to evaluate improvements in manual dexterity scores. Comparisons of pre-test and post-test scores within each subgroup are used to assess the effects of treatment type (unilateral vs. bilateral) and treatment order (interventional exercises in the first phase vs. non-interventional activities in the first phase) on right hand manual dexterity. Scores range from 0 upward, with higher scores reflecting a greater number of blocks successfully transferred within the allotted test time using the right hand.

Pre-test scores are obtained using the Box and Blocks Test (BBT) to assess left hand manual dexterity scores before the start of the experiment. After 24 sessions, when participants have completed both the interventional and non-interventional training programs in each group (e.g., unilateral and bilateral training groups), the BBT is administered again to evaluate improvements in manual dexterity scores. Comparisons of pre-test and post-test scores within each subgroup are used to assess the effects of treatment type (unilateral vs. bilateral) and treatment order (interventional exercises in the first phase vs. non-interventional activities in the first phase) on left hand manual dexterity. Scores range from 0 upward, with higher scores reflecting a greater number of blocks successfully transferred within the test time slot using the left hand.

Pre-test scores are obtained using the Chorsi Block Test (CBT) to assess visuospatial memory before the start of the experiment. After 24 sessions, when participants have completed both the interventional and non-interventional training programs in each group (e.g., unilateral and bilateral training groups), the CBT is administered again to evaluate progress in visuospatial memory. The comparison of pre-test and post-test scores within each subgroup allows assessment based on treatment type (unilateral vs. bilateral) and treatment order (interventional exercises in the first phase vs. non-interventional activities in the first phase) on visual spatial memory in NVLD children. Scores range from 0 upward, with higher scores reflecting a stronger ability to remember spatial locations and sequences of blocks presented during the test.