Museum & Collections
The Institute maintains the world's largest public collection of standardised projective assessment instruments, spanning eight decades of methodological development. All materials are housed in climate-controlled, restricted-access archival facilities. Access to certain collections requires institutional affiliation and ethics review approval.
Collection Categories
Standardised Instruments
- Thematic Apperception Test (TAT) · 1935 onwards
- Holtzman Inkblot Technique · Original protocols and variants
- Children's Apperception Test (CAT) · 1949 onwards
- Blacky Pictures Test · 1950 onwards
- Sentence Completion Tests · Multiple instruments
- Draw-A-Person Test · 1949 onwards
- Regional and specialist instruments · Various
The Institute's collection does not include Rorschach materials.
Digital Archive
Since 2019, the Institute has been systematically digitising archival materials in partnership with J. B. Fowler, Precision Stimuli. This process involves high-resolution scanning, colour calibration, and rigorous quality assurance against original specimens. Digitised materials undergo validation against perceptual equivalence standards established by the Perceptual Analytics Group (PAG-PAS-001).
Restricted Access: Item IPS-ARC-2024-001
Access Restricted
One item in the Institute's collection became the subject of institutional review in 2024. This item has been moved to enhanced restricted access pending further evaluation. It is no longer used in any active research programme. Access is limited to accredited researchers with institutional affiliation, ethics board approval, signed acknowledgment of material sensitivity, and documented research purpose. View specimen record.
Collection Statistics
| Total holdings | 12,847 |
| Digitised | 3,204 |
| Restricted access | 1,186 |
| Currently under conservation | 47 |
Research Bibliography
The Institute maintains a reference bibliography of works relevant to projective assessment methodology, including publications by current and former Institute affiliates. Visit the Reading Room.