• Indicate whether each association is a positive correlation or a negative correlation.

1. The more children and youth used various media, the less happy they were with their lives (Rideout et al., 2010).

2. The less sexual content teens saw on TV, the less likely they were to have sex (Collins et al., 2004).

3. The longer children were breast-fed, the greater their later academic achievement (Horwood & Ferguson, 1998).

4. The more income rose among a sample of poor families, the fewer psychiatric symptoms their children experienced

(Costello et al., 2003).