Does Seasonal Affective Disorder Exist? A Commentary on Traffanstedt,Mehta,and LoBello (2016)

Derogatis L. (1994). SCL-90-R administration, scoring, and procedures manual (3rd ed.). Minneapolis, MN: Pearson.

First M. B. Spitzer R. L. Gibbon M. Williams J. B. W. (1996). Structured Clinical Interview for DSM-IV Axis I Disorders, Clinician Version (SCID-CV). Washington, DC: American Psychiatric Press.

Hox J. (2002). Multilevel analysis: Techniques and applications. Mahwah, NJ: Lawrence Erlbaum.

Kerr D. C. R. Shaman J. Washburn I. J. Vuchinich S. Neppl T. K. Capaldi D. M. Conger R. D. (2013). Two longterm studies of seasonal variation in depressive symptom among community participants. Journal of Affective Disorders, 151, 837–842.

MacCallum R. C. Zhang S. Preacher K. J. Rucker D. D. (2002). On the practice of dichotomization of quantitative variables. Psychological Methods, 7, 19–40.

Magnusson A. Axelsson J. Karlsson M. M. Oskarsson H. (2000). Lack of seasonal mood change in the Icelandic population: Results of a cross-sectional study. American Journal of Psychiatry, 157, 234–238.

McCarthy E. Tarrier N. Gregg L. (2002). The nature and timing of seasonal affective symptoms and the influence of self-esteem and social support: A longitudinal prospective study. Psychological Medicine, 32, 1425–1434.

Mueller P. S. Davies R. K. (1986). Seasonal affective disorders: Seasonal energy syndrome? Archives of General Psychiatry, 43, 188–189.

Murray G. (2001). Seasonality: The importance of longitudinal measurement. In Partonen T. Magnusson A. (Eds.), Seasonal affective disorder: Practice and research (pp. 55–64). New York, NY: Oxford University Press.

Murray G. Allen N. B. Trinder J. (2001). A longitudinal investigation of seasonal variation in mood. Chronobiology International, 18, 875–891.

Nayyar K. Cochrane R. (1996). Seasonal changes in affective state measured prospectively and retrospectively. British Journal of Psychiatry, 168, 627–632.

Posternak M. A. Zimmerman M. (2002). Lack of association between seasonality and psychopathology in psychiatric outpatients. Psychiatry Research, 112, 187–194.

Radloff L. S. (1977). The CES-D Scale: A self-report depression scale for research in the general population. Applied Psychological Measurement, 1, 385–401.

Rosenthal N. E. Bradt G. H. Wehr T. A. (1984). Seasonal Pattern Assessment Questionnaire. Bethesda, MD: National Institute of Mental Health.

Rosenthal N. E. Sack D. A. Gillin J. C. Lewy A. J. Goodwin F. K. Davenport Y. . . . Wehr T. A. (1984). Seasonal affective disorder: A description of the syndrome and preliminary findings with light therapy. Archives of General Psychiatry, 41, 72–80.

Sakamoto K. Nakadiara S. Kamo K. Kamo T. Takahashi K. (1995). A longitudinal follow-up study of seasonal affective disorder. American Journal of Psychiatry, 152, 862–868.

Spoont M. R. Depue R. A. Krauss S. S. (1991). Dimensional measurement of seasonal variation in mood and behavior. Psychiatry Research, 39, 269–284.

Steinhausen H. C. Gundelfinger R. Winkler R. Metzke C. (2009). Prevalence of self-reported seasonal affective disorders and the validity of the Seasonal Pattern Assessment Questionnaire in young adults: Findings from a Swiss community study. Journal of Affective Disorders, 115, 347–354.

Traffanstedt M. K. Mehta S. LoBello S. G. (2016). Major depression with seasonal variation: Is it a valid construct? Clinical Psychological Science, 4, 1–10.

Whitcomb-Smith S. Sigmon S. T. Martinson A. Young M. Craner J. Boulard N. (2013). The temporal development of mood, cognitive and vegetative symptoms in recurrent SAD episodes: A test of the dual vulnerability hypothesis. Cognitive Therapy and Research, 38, 43–54.

White T. M. Terman M. T. (2004, May). The global seasonality score reconsidered: Convergence on diagnosis of winter depression. Paper presented at the annual meeting of the Society for Light Treatment and Biological Rhythms, Toronto, Canada.

Young M. A. (1999). Integrating psychological and physiological mechanisms of SAD: The dual-vulnerability model. Biological Rhythms Bulletin, 1(3), 4–6. Retrieved from http://sltbr.org/wp-content/uploads/2016/04/BRB_V1_N3_Fall-1999.pdf

Young M. A. Hutman P. Enggasser J. L. Meesters Y. (2015). Assessing usual seasonal depression symptoms: The seasonality assessment form. Journal of Psychopathology and Behavioral Assessment, 37, 112–121.

Young M. A. Meaden P. M. Fogg L. F. Cherin E. A. Eastman C. I. (1997). Which environmental variables are related to the onset of seasonal affective disorder? Journal of Abnormal Psychology, 106, 554–562.

Young M. A. Reardon A. Azam O. (2008). Rumination and vegetative symptoms: A test of the dual vulnerability model of seasonal depression. Cognitive Therapy and Research, 32, 567–576.

Young M. A. Watel L. G. Lahmeyer H. W. Eastman C. I. (1991). The temporal onset of symptoms in winter depression: Differentiating underlying mechanisms. Journal of Affective Disorders, 22, 191–197.

Zigmond A. S. Snaith R. P. (1983): The Hospital Anxiety and Depression Scale. Acta Psychiatrica Scandinavica, 67, 361–370.