Types of consent | |
 Implied consent | Whereby consent is not explicitly sought from participants to use their samples in research. |
 Blanket consent | Consent that is sought from the participant once, either at or prior to sample collection, for use in any and all future research without the need obtain any further consent. |
 Broad consent | Consent that is sought from the participant once, either at or prior to sample collection, for use in any and all research without the need obtain further consent from the participant, who then delegates their decision making authority to an IRB (or another institution) for specific research projects. |
 Categorical consent | Consent that is sought from the participant to use samples in particular categories of research, and may include an option that allows researchers to recontact participants for consent to use samples outside of nominated areas of research. |
 Specific consent | Consent that is sought from the participant to use samples in specific research projects only, and may include an option that allows researchers to recontact participants for consent to use samples in other projects. |
 Tiered consent | Provision of multiple options for participants to choose the type of consent they wish to provide. |
Types of consent methods | |
 Opt out | Whereby consent is not explicitly sought for a given action, but participants are informed about the option to withdraw. |
 Opt in | Whereby verbal or written consent is explicitly sought from the participant to use samples in research. |
Types of withdrawal options | |
 Tiered withdrawal | Whereby participants are given numerous options to withdraw in varying degrees. I.e. to withdraw from further contact while leaving samples and data in the study, or withdraw samples while leaving data, or withdraw all samples, personal information and discontinued use of data |
 Single withdrawal | Whereby participants are given the option to either continue participation or withdraw completely. |