RP-7 Indicate whether each association is a positive correlation or a negative correlation.

1. The more husbands viewed internet pornography, the worse their marital relationships (Muusses et al., 2015).

2. The more time teen girls spend absorbed with online social media, the more at risk they are for depression and suicidal thoughts (Kelly et al., 2018; Twenge & Campbell, 2019).
3. The longer children were breast-fed, the greater their later academic achievement (Horwood & Fergusson, 1998).
4. The more leafy vegetables older adults eat, the less their mental decline over the ensuing 5 years (Morris et al., 2018).