2.4. Variables and Measurements
sleep behavior, substance abuse
SECONDARY, POSITIVE
This study considers different measures at three time points: a baseline measurement (‘Baseline)’, previous to interventions; a post intervention measurement (‘Post’, 4 weeks after baseline), and a follow-up measurement (‘Follow-up’, 12 weeks after baseline). The measurements were conducted by a self-report survey in which participants had to complete eight validated scales, related to well-being and lifestyle habits. Due to sanitary conditions caused by the COVID-19 pandemic, the questionnaires were administered online (via SurveyMonkey Inc., San Mateo, CA, USA). For this study, the Spanish version of each questionnaire was used.The mental/psychological aspect of well-being has been studied from two main perspectives: the eudaimonic and the hedonic, also called psychological and subjective well-being, respectively [Given the well-known multidimensionality of well-being and its close relation to concepts such as quality of life, we also included three secondary measures of well-being: (a) Positive And Negative Affect Scales (PANAS) [Two exploratory outcomes were also included in order to investigate some aspects relating to top-down modulation of the MGBA, such as interoception and mindfulness. Alterations in interoceptive awareness have been proposed as an important feature of several mental health issues [Finally, the custom-made lifestyle survey was designed in order to study some aspects of participants’ lifestyles. This four-point Likert scale includes seven domains of lifestyle: diet, physical activity, sleep behavior, nature exposure, social contact, social media use, and substance abuse. To reduce the dimensionality of the variables, and considering that it has been observed that health-related behavioral patterns are generally associated between them across domains (diet, physical exercise, sleep, substance use, etc.) [Healthy behavior patterns include the diet domain (whole grains, fruits, vegetables, omega 3, fermented foods), physical activity, nature exposure, and social contact. The dietary components of this category correspond to international recommendations [