There are two possible interactions between emotion and cognition: Effects of cognitions on emotions, and effects of emotions on cognitions.
An interesting method to study emotions is experience sampling.
The structure of emotions has been addressed by dimensional and categorical approaches. In the former approach emotions are defined by valence and arousal; in the latter a distinction is made between 6 basic emotions - happiness, sadness, anger, disgust, fear, surprise.
Emotions consist of several components. Five of them are: appraisal, autonomic response, action tendency, expression, and feeling.
Emotions are shorter and more intense than moods; they are elicited by stimuli the person is aware of. Moods last longer, are less intense, and are not tied to a specific stimulus. Differences in personality mean that some people experience some emotions more often and more intensely than others.
Affect is sometimes used as a catch-all phrase. Positive and negative affect are to some extent each other’s opposite, because they correlate negatively, but they do not completely exclude each other, giving rise to mixed feelings.
Emotional experiences depend on an interacting network of
bottom-up and top-down processes.
Stimulus appraisal
• Stimulus appraisal is a process that detects and assesses the
significance of the environment for an organism’s well-being. It
involves both controlled processes (deliberate reasoning) and
automatic processes (activationofmemories). The latter require
no awareness, but may not be completely unconscious.
• Hypervigilance is an example of top-down influences. Constant
attention is given to stimuli associated with a certain emotion. The
environment is continuously scanned in search of such stimuli.
Physiological processes
• Emotion-generating stimuli cause an increase in arousal in the
body, due to activation of the sympathetic nervous system. The
arousal increases the intensity of the emotion, but does not seem
to be necessary to experience emotions.
• Facial expressions communicate emotions. They also help to
generate and understand emotions, but do not seem to be critical
for these skills.
• There are few indications that the arousal is emotion-specific. The
same is true for the pattern of brain activation.
• The amygdala is an important structure for the experience of
emotions.
Understanding emotions
• Conscious feelings require interpretation of the automatic processes
involved in emotion generation.
• Some people are better at understanding feelings than others
(empathy vs. alexithymia).
Emotion regulation
When a person overrides their initial, spontaneous emotional response. This can happen explicitly or implicitly.
There are indications that different strategies may be needed for different emotions, in different situations, and for different types of people. There is no "one fits all" recommendation to be made.