Efficacy of a Dog Assisted Group Intervention in Elderly with Unwanted Loneliness

Inclusion Criteria: * People who are 65 years of age or older assigned to the Primary Health Care Center. * With a diagnosis of "living alone" registered in the computerized clinical history. * Present unwanted loneliness with a score higher than 3 on the Three-Item Loneliness Scale (TIL Scale). The TIL Scale consists of three questions: How often do you feel that you lack company?, How often do you feel excluded?, How often do you feel isolated? The response options consist of a three-level Likert scale: "almost never", "sometimes" and "often"; the results being from 3 to 9 points. * Delivery of the information sheet and signature of the informed consent. Exclusion Criteria: * If in the initial interview they declared having allergy to dogs. * Significant fear of dogs * Meets research criteria for a diagnosis of dementia. * Do not understand or speak Catalan or Spanish