During which seasons is SAD most prevalent?

• A. Spring and summer
• B. Winter and fall
• C. Summer and fall
• D. Year-round

Answer: (B)

Seasonal Affective Disorder (SAD) is a type of depression that is typically associated with changes in seasons, particularly the lack of natural sunlight during the fall and winter months. During these seasons, many individuals experience symptoms such as low energy, feelings of sadness, and changes in sleep patterns. The reduced exposure to sunlight is thought to disrupt the body's internal clock (circadian rhythm) and decrease the production of serotonin, a neurotransmitter linked to mood regulation. This connection to the lesser availability of daylight in winter and fall is why SAD is most prevalent during these seasons.

In contrast, SAD is less commonly reported during spring and summer when days are longer and people generally have more exposure to sunlight. These periods tend not to be associated with the mood disturbances that characterize SAD. Thus, the correct answer reflects the seasonal timing that aligns with the onset and prevalence of this disorder.