Robert E. Thayer has written:

'The biopsychology of mood and arousal' -- subject(s): Affective Symptoms, Arousal, Arousal (Physiology), Mood (Psychology), Physiological aspects, Physiological aspects of Mood (Psychology), Physiology, Psychobiology, Psychology, Psychophysiology

'The Origin of Everyday Moods' -- subject(s): Mood (Psychology), Affect (Psychology)

Jerri Leigh Gibson has written:

'The relationship between precompetitive affect and collegiate gymnastic performance' -- subject(s): Affect (Psychology), College athletes, Competition (Psychology), Gymnastics for women, Mood (Psychology), Psychological aspects, Psychological aspects of Gymnastics for women, Psychology, Women athletes

Matthias Siemer has written:

'Stimmungen, Emotionen, und soziale Urteile' -- subject(s): Emotions, Judgment, Mood (Psychology)

There are ten branches of Psychology not two.

Abnormal Psychology;

Behavioral Psychology;

Clinical Psychology;

Cognitive Psychology;

Community Psychology;

Developmental Psychology;

Educational Psychology;

Evolutionary Psychology;

Legal Psychology; and

Personality Psychology.

classes of psychology are; educational psychology, industrial psychology, counselling psychology, clinical psychology, social psychology,experimental psychology, industrial psychology, physiology psychology, development psychology and engineering psychology.