1. Psychoanalytische Studien zur Charakterbildung;Abraham,1925
2. The obscure figures test: An instrument for measuring “cognitive innovation.”;Acker;Perceptual and Motor Skills,1965
3. “The need for novelty”: A comparison of six instruments;Acker;Psychological Record,1967
4. The authoritarian personality;Adorno,1950
5. Patterns of attachment: A psychological study of the strange situation;Ainsworth,1978