Effects of a Relaxation and Guided Imagery Intervention in School Context

Global Happiness Faces Scale

Faces Scale is a single-item measure of happiness that is reliable, valid and commonly used. This scale has only 1 item but it has seven simple drawings of faces that represent participants' response options to the question: "Overall, how do you feel?". Afterwards the participants must choose the face that best represents feelings ranging from "very unhappy" to "very happy".

Positive and Negative Affect (PANAS C)

Positive and Negative Affect will be measured using a Portuguese short version of the PANAS-C. The original scale is composed of ten positive and ten negative emotions. Children rate how often they had felt each emotion under a specific time frame (e.g., over the past 2 weeks), using a 5-point scale (from 1 = very slightly or not at all to 5 = extremely). Higher scores on positive emotions and lower scores on negative emotions are indicative of higher of higher positive emotions.

Mental Health Continuum (MHC)

Mental health will be measured by the Mental Health Continuum Short Form (MHC-SF) Portuguese version. It measures positive mental health and is comprised by 14 items organized in three sub scales: emotional well-being (EWB) (3 items; e.g., "How often have you felt happy?"), social well-being (SWB) (5 items; e.g., "How often have you felt that you belong to a community such as a social group, your school, or your neighbourhood?), and psychological well-being (PWB) (6 items; e.g., "How often have you felt that you had warm and trusting relationships with others?"). This scale also provides a flourishing and languishing mental health indicator based on these three subscales: emotional well-being, social well-being, and psychological well-being. Respondents rate the frequency of each symptom of positive mental health in the past few months on a 6-point Likert type scale (0 = never to 5 = every day). Higher scores are indicative of higher Mental Health.

Socioemotional Skills - Socioemotional Skills Questionnaire (QACSE)

The Socioemotional Skills Questionnaire QACSE adaptation for children with 9 to 12 years old derives from de QACSE for adolescents (7th to 9th grade). This instrument consists of 39 items, answered on a four-point response scale from A "Never" to D ''Always", organized into six dimensions. Higher scores are indicative of higher levels on each dimension: Self-control; Social Awareness; Relational Skills; Social Isolation; Social Anxiety; Responsible Decision Making.