Why is it that claiming you have an "immature brain" would be an illegitimate response when being sentenced for a crime?

Here's an interesting article on this subject.

http://www.psychologytoday.com/blog/plus2sd/200910/my-immature-brain-made-me-do-it

okay thanks

could you please help me explain how this is related to psychology ?

Doesn't behavior fall in the category of psychology?

http://dictionary.reference.com/browse/psychology

Claiming to have an "immature brain" as a defense during a criminal sentencing is generally considered an ineffective or illegitimate response. Here's why:

1. Legal accountability: The legal system generally assumes that individuals above a certain age (varying by jurisdiction) are deemed capable of understanding the consequences of their actions and are accountable for their behavior. The concept of "maturity" refers to the level of understanding and ability to make responsible choices.

2. Definition of immaturity: While it is recognized that brain development continues into early adulthood, claiming an "immature brain" as a defense is not sufficient on its own. Courts recognize that some level of maturity is achieved by most individuals at a certain age, where they can reasonably understand the difference between right and wrong.

3. Mitigating factors: If an individual wishes to argue that their age or cognitive development impacted their ability to comprehend the full consequences of their actions, they would need to provide additional evidence to support their claim. This may involve presenting expert testimony on brain development, mental health evaluations, or other relevant data.

4. Legal precedent: Courts often rely on existing legal precedent and established legal frameworks to make sentencing decisions. The claim of an "immature brain" may not fit within the recognized legal standards for considering mitigating circumstances during sentencing.

Ultimately, the decision to accept or reject such a defense lies with the judge or jury, who will consider the specific circumstances of the case, applicable laws, and established legal principles while making their determination.