Convicted Offenders - Ethical issues

There are a number of ethical issues with using convicted offenders in psychological research. 
Taken from mark scheme. 
* Prisoners may feel pressured to take part in research
* This is because they are in a vulnerable situation and do not want to appear negative
* They may fear reprisal if they do not co-operate
* The findings of research may have issues, such as parent/individual blaming
* This could have negative implications for the individual or family such as victimisation of prison inmates or their families
* As prisoners have the same rights as participants in any psychological study