Handbook of Management Scales/State uncertainty
State uncertainty (alpha = 0.81) 
An important contribution to the literature on perceived environmental uncertainty (PEU) is Milliken's (1987) distinction between state uncertainty, effect uncertainty, and response uncertainty. Using a two-phase empirical study, this research seeks to develop and test scales to measure the three constructs in terms of dimensionality, reliability, and validity (including nomological validity).
State uncertainty is defined as the situation that occurs when managers do not feel confident that they understand what the major events or trends in an environment are or feel unable to accurately assign probabilities to the likelihood that particular events or changes will occur (Milliken 1987, 1990).
- How often do you feel you have the information you need in order to understand how this factor will change in the future? (never/always)
- How often do you believe the marketing information you have about this factor is adequate for your marketing management decision making? (never/always)
- How often do you feel you are able to get the necessary information about this factor for your marketing management decision making? (never/always)
- Ashill/Jobber (2010): Measuring State, Effect, and Response Uncertainty: Theoretical Construct Development and Empirical Validation. Journal of Management, Vol. 36, No. 5, pp. 1278-1308.