Participants followed a single-group sequential intervention design. After baseline assessment (T0), participants received neurodevelopmental treatment (NDT) for 4 weeks (20 sessions, 5/week, 45 min), including weight-shifting exercises, facilitation techniques, sensory stimulation, strengthening, and proprioceptive training. Assessments were repeated at Week 4 (T1). After a 2-week washout period, participants underwent a combined intervention of NDT (20 min) and robotic rehabilitation (RB, 25 min) for 4 weeks (20 sessions, 5/week). RB was performed using the LokoHelp Gait Trainer, a body-weight-supported treadmill system enabling gait training with adjustable speed and incline based on tolerance. Final assessments were conducted at Week 10 (T2).

Neurodevelopmental treatment (NDT) was applied as a conventional physiotherapy program focusing on facilitating normal movement patterns and improving postural control. Each session lasted 45 minutes and included weight-shifting exercises in crawling, sitting, kneeling, and standing positions; facilitation techniques; proprioceptive, auditory, and visual stimulation; isolated strengthening exercises for upper and lower extremities; and proprioceptive training. The intervention was delivered 5 times per week for 4 weeks (total of 20 sessions).

Selective motor control was assessed using the Selective Control Assessment of the Lower Extremity (SCALE). SCALE evaluates selective voluntary motor control of the hip, knee, ankle, subtalar, and toe joints bilaterally. Participants were instructed to perform each movement within 3 seconds. Each joint was scored based on performance as follows: normal selective motor control (2 points), impaired selective motor control (1 point), and inability to perform selective motor control (0 points). The total score was calculated by summing the scores of all joints. The maximum possible score is 20 points (10 points for each extremity), and the minimum score is 0. Higher scores indicate better selective motor control.

Seated postural control was assessed using the Seated Postural Control Measure (SPCM). The scale evaluates postural alignment and functional performance in the sitting position. It consists of three sections: demographic information, postural alignment during sitting, and upper extremity function. Postural deviations are rated on a 4-point scale (1 = poor, 4 = good), with higher scores indicating better postural control. The maximum score is 88 for the postural alignment section and 48 for the upper extremity function section.

Gross motor function was assessed using the Gross Motor Function Measure-88 (GMFM-88). The scale consists of 88 items grouped into five domains: lying and rolling (17 items), sitting (20 items), crawling and kneeling (14 items), standing (13 items), and walking, running, and jumping (24 items). It is used to evaluate and classify functional motor abilities in children with motor impairments. Each item is scored on a 4-point scale ranging from 0 to 3. The maximum possible score is 264, and the minimum score is 0. Higher scores indicate better gross motor function and greater levels of functional independence.