Inclusion criteria for the main (non-neuropsychologist) element include:

• General population. For convenience at this feasibility study stage this will be largely comprised of colleagues working with GHT, above the age of 18, with no upper age limit.
• Have given informed consent having followed the procedure in the protocol
• Have the physical/sensory abilities to undertake the test procedures (e.g. use of both hands, adequate vision)
• Sufficient English language to be able to follow test instructions

Exclusion criteria for the main (non-neuropsychologist) element include:

• Under the age of 18
• Refusal/inability to give informed consent
• Insufficient English language to be able to follow test instructions
• Using cognitive testing as part of their clinical work, or ongoing familiarity with cognitive tests.
• Working directly with the main investigator.
• Presence of a self-reported cognitive difficulty/neurological condition - not because that in itself would be problematic for test administration or for the information generated, but rather to avoid potential distress to participants were they to find the tests administered challenging.
• Presence of any physical/sensory/cognitive difficulty that would confound administration of the tasks, e.g. being partially sighted or having use of only one upper limb
• There are no exclusion criteria based on gender identity, ethnicity or handedness.
• There are no exclusion criteria relating to medication.

Inclusion criteria for the PPI (neuropsychologist) element include:

• clinical psychologists in GHT who have or have had a role that involves the administration of cognitive tests
• Have given informed consent having followed the procedure in the protocol
• Have the physical/sensory abilities to undertake the test procedures (e.g. use of both hands, adequate vision)
• Sufficient English language to be able to follow test instructions

Exclusion criteria for the PPI (neuropsychologist) element include:

• Under the age of 18
• Refusal/inability to give informed consent
• Insufficient English language to be able to follow test instructions
• Presence of a self-reported cognitive difficulty/neurological condition - not because that in itself would be problematic for test administration or for the information generated, but rather to avoid potential distress to participants were they to find the tests administered challenging.
• Presence of any physical/sensory/cognitive difficulty that would confound administration of the tasks, e.g. being partially sighted or having use of only one upper limb
• There are no exclusion criteria based on gender identity, ethnicity or handedness.
• There are no exclusion criteria relating to medication.