Table 1 List of all used assessments including brief description of task.

From: Neuropsychological profiles of patients suffering from hallucinogen persisting perception disorder (HPPD): A comparative analysis with psychedelic-using and non-using controls

Test

Sub-test

Task

Attention functions

Wechsler Adult Intelligence Scale IV

(WAIS IV)

Digit Symbol

Participant must match numbers with specific symbols within a set time limit

Symbol Search

Participant must identify whether a target symbol appears within a group of symbols within a set time limit

Testbatterie zur Aufmerksamkeitsprüfung (engl.: Testbattery for Attention Testing, TAP)

Alertness (phasic, tonic)

Participant responds to visual stimuli by pressing a button as quickly as possible (with and without a warning sound)

 

Divided attention

Participant responds to both visual and auditory stimuli simultaneously

Stroop Test (German Version)

 

Participant reads out colour names, then names coloured bars and finally names the ink colour of colour words which do not correspond to the actual word while ignoring the word’s meaning, all as quickly as possible

Trail Making Test (TMT-A)

Test A

Participant connects numbered circles in ascending order

Visual perception

  

Rey-Osterrieth Complex Figure Test (ROCF)

Copy

Participant reproduces a complex geometric figure from observation

Memory

ROCF

Recall, delayed recall

Participant reproduces the complex geometric figure from memory

Wechsler Memory Scale III R (WMS

IIIR)

Digit span

forwards/

backwards

Participant repeats digit spans from memory forwards and backwards

Wechsler Memory Scale IV (WMS IV:

German Version)

Logical Memory

Participant repeats details of two short stories immediately and after a 20 min timespan

Executive functioning

Tower of London (ToL; German Version)

 

Participant moves colored balls between pegs to recreate a target configuration while following specific rules

Regensburger Wortflüssigkeitstest

(engl.: Regensburg Test of Word

Fluency, RWT)

cat. fluency/

cat. change

Participant generates as many words as possible within a specific category or changing categories

Wisconsin Card Sorting Test 64 Items (WCST-64)

 

Participant matches cards based on changing rules

Trail Making Test (TMT-B)

Test B

Participant connects alternating numbered and lettered circles in ascending order