 The results of these studies showed that there was a very low correlation between connectedness to nature and subjective well-being, meaning that the results from the Mayer and Frantz study in 2004 could not be replicated.According to Cervinka et al., the CNS only correlated with meaningfulness, suggesting that it measures something along the lines of one's experience with sense of meaning and purpose in life through nature.There are some controversies surrounding the CNS.