Anxiety disorders give a continuous feeling of fear and anxiety which is disabling and may affect daily functioning. For example, anxiety disorder, phobias such as arachnophobia which is a fear of spiders.
Affective disorders are characterised by strong moods and emotions which disable the individual and prevent them leading and everyday life. For example depression and bipolar disorders.
Psychotic disorders involve a less contact with reality often characterised by hallucinations or delusions. For example, schizophrenia.