The study involving healthy participants aims to validate the Virtual Eggs Test (VET) as a tool for measuring hand dexterity and grip force control. This part of the study focuses on determining the test's reliability and validity in a population without motor impairments. Healthy participants will perform the VET using both their dominant and non-dominant hands across two sessions. The purpose is to establish baseline performance metrics for comparison with stroke patients and to assess the test's usability in clinical settings.

Inclusion Criteria:

• Age between 18 and 85 years.
• No motor deficits.
• Adequate cognitive and language abilities to understand the experiment and follow instructions.
• Signed informed consent.

Exclusion Criteria:

• Significant visual or oculomotor impairments.
• Comorbidities or disabilities that may interfere with the study, such as multiple sclerosis, Parkinson's disease, or muscle tone disorders.
• Cardiopulmonary or circulatory pathologies.
• Pregnancy or breastfeeding.
• Psychiatric comorbidities.
• Difficulty understanding the Italian language.
• Lack of cooperation.
• Consumption of alcohol or diuretics before the test