Perceived positive parenting was assessed at the first wave, by the 18-item Emotional Warmth scale of the EMBU (a Swedish acronym for My Memories of Upbringing) for children (EMBU-C),48 which has very good psychometric properties.49, 50 The answers for both the parents were highly correlated (r=0.79), and therefore combined into a single measure. Positive affect was measured at the second wave, by the Behavioral Activation System Drive scale of the Behavioral Inhibition System/Behavioral Activation System scales.51 This scale was selected because it has good psychometric properties and showed the highest correlation with positive affect as assessed with the Positive Affect and Negative Affect Scale.51, 52
