Editing Mood (psychology) (section)

=== Environment ===
[[Nature]] can also have a positive effect on mood. Studies have shown that exposure to natural environments increases positive affect and decreases negative affect, meaning that one's mood is often better when in a nature setting.<ref name=":0">{{Cite journal|last1=McMahan|first1=Ethan A.|last2=Estes|first2=David|date=2015-01-13|title=The effect of contact with natural environments on positive and negative affect: A meta-analysis|url=http://dx.doi.org/10.1080/17439760.2014.994224|journal=The Journal of Positive Psychology|volume=10|issue=6|pages=507–519|doi=10.1080/17439760.2014.994224|s2cid=144085899|issn=1743-9760}}</ref> An example of this is how direct exposure to sunlight has been proven to improve mood and has been used to treat symptoms of depression.<ref name=":03">{{Cite journal|title=A warm heart and a clear head. The contingent effects of weather on mood and cognition|url=https://login.ezproxy3.lhl.uab.edu/login?url=https://journals.sagepub.com/doi/full/10.1111/j.1467-9280.2005.01602.x|access-date=2021-10-09|journal=Psychological Science|year = 2005|doi=10.1111/j.1467-9280.2005.01602.x|pmid = 16137259|last1 = Keller|first1 = M. C.|last2 = Fredrickson|first2 = B. L.|last3 = Ybarra|first3 = O.|last4 = Côté|first4 = S.|last5 = Johnson|first5 = K.|last6 = Mikels|first6 = J.|last7 = Conway|first7 = A.|last8 = Wager|first8 = T.|volume = 16|issue = 9|pages = 724–731|hdl = 2027.42/73377|s2cid = 8607332|hdl-access = free}}</ref><ref>{{Cite journal|pmid=9657420 |year=1998 |last1=Stain-Malmgren |first1=R. |last2=Kjellman |first2=B. F. |last3=Aberg-Wistedt |first3=A. |title=Platelet serotonergic functions and light therapy in seasonal affective disorder |journal=Psychiatry Research |volume=78 |issue=3 |pages=163–172 |doi=10.1016/s0165-1781(98)00017-1 |s2cid=6430547 }}</ref> Further, walking outdoors as opposed to walking indoors made individuals much happier, which additionally illustrates that nature has a positive effect on our mood.<ref name=":2">{{Cite journal|last1=Nisbet|first1=Elizabeth K.|last2=Zelenski|first2=John M.|date=2011-08-09|title=Underestimating Nearby Nature|url=http://dx.doi.org/10.1177/0956797611418527|journal=Psychological Science|volume=22|issue=9|pages=1101–06|doi=10.1177/0956797611418527|pmid=21828351|s2cid=38722274|issn=0956-7976}}</ref> While nature often improves our mood, it can worsen it as well. There is a common mood disorder called [[Seasonal affective disorder|Seasonal Affective Disorder]] (SAD) that often occurs during the winter months when there is less daylight and it is colder outside. SAD is characterized by depressed mood, increased appetite, and increased sleep.<ref>{{Cite journal|last1=Partonen|first1=Timo|last2=Lönnqvist|first2=Jouko|date=1998-03-01|title=Seasonal Affective Disorder|url=https://doi.org/10.2165/00023210-199809030-00004|journal=CNS Drugs|language=en|volume=9|issue=3|pages=203–12|doi=10.2165/00023210-199809030-00004|s2cid=32085936|issn=1179-1934}}</ref> This displays how an individual's mood can be negatively affected by nature as well. Studies have also shown that depending on the season, temperature can regulate mood.<ref name=":03"/>