YES OR NO                                                        YES OR NO                                                             NO

               NO                               YES

 YES                                                                             NO
 

  YES                   NO

Example:
Health services studies where subjects' knowledge of the study may invalidate the research 

IF:
A waiver or alteration will not adversely affect the rights and welfare of the subjects;

AND

Whenever possible, subjects will be provided with additional pertinent information after they have participated in the study.

Example:
Subjects are users of illegal drugs
 

IF:
There may be a significant risk to the subject from linking a consent document to him/her

Examples:
Subject does not understand English;  or
All contact will take place over the telephone.
 

IF:
An IRB-approved summary of the verbal presentation will be used; 

AND 

An independent witness to the oral presentation signs the summary;

AND

Copies of the signed summary and short form are provided to subject and witness, with short form in language understandable to subject