The early detection of defects in motor skill development in infants is critical to the administration of physical therapy to allow for proper future development. Evaluation of these motor skills are currently determined by subjective observation by clinicians. Although some use of force-plates is used, their limited availability and cost are often prohibitive. Researchers at the University of Nebraska at Omaha have designed an in-expensive, mobile system that evaluates the motor development of infants, by assessing their ability to sit on their own. The device can be transported to the patient's residence, or used in any exam room for the collection of data to determine the presence of motor developmental delays, or the efficacy of therapy being used to treat a known motor defect. The device allows for an objective determination of the motor development of infants, allowing for more precise treatment leading to an improved patient outcome.