Nature connection, defined as a subjective sense of oneness with nature, is one psychological variable that promotes pro-environmental behaviour (Mayer & Frantz, 2004; Nisbet, Zelenski, & Murphy, 2009). This meta-analysis reviews correlational and experimental evidence for this relationship. Results in the correlational analysis show a strong association between nature connection and pro-environmental behaviours (r = .41), which was significant for various operationalizations of nature connection and private sphere and public sphere pro-environmental behaviours. Unlike in the correlational data, there was evidence of publication bias when meta-analyzing experimental studies. By including unpublished studies in the meta-analysis, I corrected for this bias and found a small but significant causal effect of nature connection on pro-environmental behaviour (d = .25). I discuss discrepancies between how nature connection is measured and manipulated, and how future studies can better examine the processes by which nature connection causes pro-environmental behaviour.
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