The term consent capacity means for an adult to have the ability to understand information relevant to making an informal or voluntary decision. A wide range of diseases, disorders, conditions and injuries can affect a person’s ability to understand and give consent to information that has been relayed to them. Informed consent is a phrase often used in law to indicate that the consent from the individual meets the certain minimum standards. In order to give informed consent the individual concerned must have adequate reasoning faculties and be in possession of all relevant facts at the time that the consent is given. Impairments to reasoning and judgment which may make it impossible for someone to give informed consent include such factors as basic intellectual or emotional immaturity, high levels of stress such as post-traumatic stress disorder or as severe mental retardation, severe mental illness, intoxication, severe sleep deprivation, Alzheimer's disease, or being in a coma.
Questioning and challenging decisions that are made by others this would depends on the mental capacity of the individual you want to support. First, you would obtain their permission and then you must get them to explain as exactly as possible what help they reckon they need. Then you can offer further information, suggestions, and a plan to challenge such decisions. You could offer to be their spokesperson if they weren't confident enough to speak out, or to accompany them to any hearing or appointment. However if the person is mentally impaired, you would have to get their signed permission to speak and act on their behalf before any health or social care workers would listen to you because of issues of confidentiality, you either have to be next of kin, or obtain powers of attorney or guardianship.
How identity, self-image and self-esteem are linked is that self-esteem is how much you value yourself, in an ideal world this would be an equal to anyone purely on the