Experimental Validation of the Virtual Eggs Test (VET) in the Pediatric Population

Score of Virtual Eggs Test (VET)

The Virtual Eggs Test (VET) is a medical device for assessing fine and gross dexterity by analyzing the participant's ability to carry fragile objects. The main components of the VET are a set of fragile objects, called Virtual Eggs (VEs), a sensorized platform used to guide task execution, and software developed to support the therapist in data acquisition. The VET execution protocol includes two phases: a familiarization phase and a testing phase. The goal of the first phase is to make the participant familiar with the movements to be performed. During the testing phase, participants are asked to carry the selected VEs from one point on the platform to another (passing the barrier) without breaking them and as quickly as possible. At the end of the test, the VET provides a fine dexterity index and a gross dexterity index by combining information regarding the speed of transport of the VEs and the accuracy of grip force regulation.

Score of Box and Blocks Test (BBT)

The Box and Block Test (BBT) measures unilateral manual dexterity. The BBT consists of a wooden box divided into two compartments by a barrier and 150 blocks. The test involves asking the patient to move, one by one, the maximum number of blocks from one compartment of the box to the other, within 60 seconds. Higher scores on the test indicate better gross manual dexterity. This standardized test has also been validated for pediatric use and is used widely in clinical practice among assessment tests for upper limb performance in children with neurodevelopmental disorders and disabilities, such as CP.

Score of Tyneside Pegboard Test (TPT)

The Tyneside Pegboard Test (TPT) is a test for measuring fine manual dexterity in children with unilateral CP. During the test, participants are asked to insert nine pegs into a pegboard as quickly as possible. Based on the tests available in the literature for assessing manual dexterity, the TPT can quantitatively measure, in terms of time, manual dexterity in children with hand motor impairment, such as children with unilateral CP. A faster execution time indicates greater fine motor skills.

Score of ABILHAND-Kids (only for children with CP)

Is a brief questionnaire that measures 21 key bimanual daily activities. The score is assigned by a parent based on the difficulty the child has in performing the requested activity on a daily basis, using a 3-point scale (impossible, difficult, easy). The response scores are entered into a Rasch model to obtain a continuous score representing the child's level of manual ability. A higher score indicates greater manual skill and autonomy. It has been validated in children with Cerebral Palsy aged 6 to 15 years, showing good validity (R=0.94) and good reproducibility over time (R=0.91). Only participants of CP group will be tested with ABILHAND-Kids.

Score of Semmes Weinstein monofilament test

Sensory perception is evaluated with the Semmes-Weinstein monofilaments which are designed to exert specific amounts of force when applied to the skin. They come in various sizes, each representing a different level of force or pressure. During the examination, the therapist will apply the monofilaments to the distal phalanx index of each hand and the participant will be asked to indicate whether they can feel the monofilament, with vision occluded. The score is based on the three correct trials of the last monofilament applied. A lower monofilament stimulus intensity indicates better sensory perception. This measure was introduced to assess tactile perception of children with CP, as it is often associated with the motor impairment typical of children with this diagnostic profile.