The intervention is multilevel and is based on bringing together two population groups in the community with complementary needs:

1. People over 16 years of age isolated at home due to mobility problems or chronic mental illness.
2. Volunteers from the neighborhood, especially people with interested in improving their emotional well-being.

REBEC will conduct a first individual interview to confirm that the volunteers are emotionally and vitally stable at the time of the intervention.

A personalized relational dynamic of help will be set up in each case (one-to-one interaction, relational level). This interaction can consist of listening at home or going with the person on the street to bring them closer to the different proposals for community social activities.

The group of social isolation and/or unwanted loneliness will also receive support from the community team, to provide a personalized response to the physical, health, social or psychological needs detected by the v

In-waiting list for intervention in future rounds; habitual care

One-to-one delivered interaction at relational level (Interpersonal Relations, Volunteers) Socio-health interaction at personalized level (Social Work) Group delivered interaction for volunteers (Group Dynamics) Community-level interactions (Social Cohesion, Community Networks)

Social Support Scale (OSLO 3) (Kocalevent, 2018).

The Oslo 3 social support scale is part of the ECHI list (European Community Health Indicators). Study the relationship between support and psychological suffering. It consists of three questions:

• How many people do you have around when you need them because you have a severe problem? Outcomes: 0, 1-2, 3-5, 5+.
• What interest do people show in what you do? Answers: many, some, uncertain, little, not at all.
• Is it easy for you to ask your neighbors for help if you need it? Answers: quite easy, easy, possible, difficult, exceedingly difficult.

The result of the scale is the sum of the score of all the questions. The range is between 3 and 14 points. Outcome classifies as follows:

• Between 3 and 8: poor social support.
• Between 9 and 11: medium social support.
• Between 12 and 14 high social support.

Emotional Well-being Scale (7 items) SWEMWBS (Castellví, 2017). The questionnaire consists of seven items measured with a Likert-type scale, with five answer options (1 never - 5 always), about how the person has felt in the last two weeks. This questionnaire has recently been adapted to Catalan and Spanish and added to the Catalan Health Survey.

The result of the emotional well-being test is the sum of the score of each item. Therefore, the score ranges from 5 to 35.

There are no cut-off points. Well-being is a continuum, and we cannot consider itself high, medium, or low. The interesting thing is to see the evolution of well-being in the same person.

Unwanted loneliness will be addressed separately in a qualitative study as a complex and empirical phenomenon, not guided from the outset by predetermined theories (constructivist perspective). It will be measured in a semi-structured interview with a single binary answer question: "Do you feel lonely?" (yes/no). This will be followed by a Visual Analogue Scale to attempt to measure the subjective feeling of loneliness, which could be more associated with poor psychological health than with the perception of a reduction in the number of relationships. Additionally, a single question will be used to evaluate whether the person wishes to be accompanied (yes/no), followed by another VAS to measure the extent of this desire.