This definition of abnormality focuses on the everyday behaviour of an individual. Most people aim to be able to cope with day-to-day living e.g. going to work, maintain friendships, get dressed etc.
Abnormality then can be judged in terms of not being able to cope with day-to-day living.
So, ‘failure to function adequately’ refers to the individual’s ability (or inability) to cope with day-to-day living.
AO1:
A classic example would be depression which can lead to inertia (inactivity) and apathy. As such, the depressed person may be ‘abnormal’ because they are unable to hold down a job.
There may be situations where a person is not coping with everyday life in a ‘normal’ way – for example, a person may be content living in unwashed clothes and not having a regular job. If this doesn’t cause distress to self or others then a judgement of abnormality is inappropriate.
AO1:
For example, if you are depressed this is acceptable as long as you can continue to work, eat meals, wash your clothes and generally go about day-to-day living.
Rosenhan & Seligman (1989) suggest some of the following characteristics can define failure to function adequately:
When a person no longer conforms to standard interpersonal rules, e.g. maintaining eye contact and respecting personal space
When a person experiences severe personal distress
When a person’s behaviour becomes irrational or dangerous to themselves or others
AO3:
A limitation of the failure to function adequately definition is that someone needs to decide whether this is actually the case
Sometimes people experience personaldistress and recognise that their behaviour is undesirable
However, sometimes people are content with their behaviour and it is others who are distressed by it
This means that whether ta behaviour is defined as abnormal or not depends on who is making the judgement
A03:
One limitation of the failure to function adequately definition is that some apparently abnormal behaviours can be functional
For example depression may lead to extra attention for the individual
this attention is rewarding and therefore has a function
This means that failure to function adequately is an incomplete definition as it fails to distinguish between behaviours that are dysfunctional and those that have some function for the individual
AO3:
A limitation of the failure to function adequately definition is that of cultural relativism
For example, the definition is based on Western culture’s ideals and beliefs
Applying them to members of non-Western cultures would be inappropriate
This means the definition is culture-bound in that it may apply only to individual in Western cultures