In addition to being dictated by age and genetics, behavior, driven in part by thoughts and feelings, is an insight into individual psyche, revealing among other things attitudes and values. Social behavior, a subset of human behavior, study the considerable influence of social interaction and culture. Additional influences include ethics, encircling, authority, rapport, hypnosis, persuasion and coercion.
The psychotic symptoms typically have a depressive âtheme,â such as delusions of guilt, poverty, or illness. Seasonal affective disorder is characterized by the onset of depression during the winter months, when there is less natural sunlight. This depression generally lifts during spring and summer.
Research into one form of depression â seasonal affective disorder (SAD) â has uncovered another potential factor in mood disorders: an internal body clock that has gone awry. Experts don't fully understand the cause of SAD, but a leading theory has been that the hormone melatonin plays a role.