## 2 Protocol Description
### Selection of Activities of Daily Living (ADLs)  
The initial phase of the protocol involves a systematic selection of ADLs to be assessed by the system, as shown in Figure 1. This selection is based on a comprehensive analysis of existing classifications of ADLs, with a focus on basic activities of daily living (BADLs) and instrumental activities of daily living (IADLs). The selection criteria emphasize objectivity, relevance to a broad population, and the ability to capture a wide range of functional capacities. The selected ADLs must undergo a rigorous evaluation by medical specialists and occupational therapists to ensure they are indicative of dependency levels.  
This phase of selection of ADLs will be carried out in the following several stages, also considering iterations across them, if required:  
1. In the first stage, the complete list of all available ADLs will be carefully analyzed, using as a reference the classification of activities from the Assessment Motor and Process Skills (AMPS) [12], as it is an observational assessment tool that evaluates the quality of performance in ADLs and has a wide range of activities classified according to their difficulty of execution. The research group of clinicians, particularly the occupational therapists, will make a selection based on the most complete activities. Consideration will be given to the number of performance components and functional requirements they contain, their feasibility based on environmental characteristics, their level of difficulty and physical effort, their efficiency and safety, and the need for assistance to ensure a correct and complete evaluation of functional capacities. The selection strategy will consider the following criteria: * Allow for the most objective evaluation of the subject regardless of gender. * Be capable of evaluating performance with the greatest possible independence from the subject's pathology or physical or psychological impairment. * Be a known activity for the largest possible population. * Be complementary activities to each other in order to observe the most limiting components of performance. The list of selected activities will be fully detailed, considering their movement characteristics, cognitive processing of the action, and performance requirements. * In the second stage, the selected ADLs will be examined by the team of medical specialists to determine if limitations and characteristic signs of dependence could be detected after the performance and observation of these activities.  
Figure 1: Protocol flowchart: development team (Section 2.1), selection of ADLs (Section 2.2), and definitions of sensorization and equipment (Section 2.3).  
3. In the third stage, a group of clinical experts in occupational therapy, external to the research team will independently score the activities according to the following: (i) the suitability of the activity to measure the desired parameters; (ii) the appearance of relevant functionality parameters. This scoring will be based on observations made in a population with dependence when performing the selected activities. The three previous phases will conclude with the selection of the final ADLs, which must complement each other and serve as the basis for the development of the EYEFUL system.
4. In the final fourth stage, the clinical research team, along with the engineering team, will evaluate the technical implications of the final selection of ADLs, in what respect to both suitable sensor configurations, and the requirements of parameters to be measured. The engineering team will provide information on the current and foreseeable capabilities of automatic systems to successfully analyze the available activities. From this coordinated effort, the engineering and clinical experts will also propose the required modifications needed to shape the final activities. This will allow for an early integration of the technical and clinical perspectives in the methodological design.