Measures that use fewer than 10 items are considered “short” and pose some challenges, including concerns about validity. This special issue addresses several misconceptions about these scales and offers ways to counteract potential problems.
Ziegler, M., Kemper, C. J., & Kruyen, P. (2014). Short scales – Five misunderstandings and ways to overcome them [Editorial]. Journal of Individual Differences, 35(4), 185–189.