Personal strategies of owners/founders of small business startups are relat
ed to performance and to environmental uncertainty. This is done using a lo
ngitudinal data set. Personal strategies are operationalized by a behaviora
l measure of the manners in which small business founders deal with situati
ons. The results suggest a dynamic process between strategy and performance
. Business owners that perform poorly employ a Reactive Strategy, with poor
performance leading to increased use of reactive behavior. High performing
business owners start out focussing on the most crucial issues (Critical P
oint Strategy), with high performance leading to a more top-down (Complete
Planning) approach. These relations are controlled for characteristics of t
he environment of the firm. Strategy use is dependent upon the type and lev
el of environmental uncertainty. Complete Planning strategy is used less fr
equently in a fast changing environment and more often in a complex environ
ment. Use of Opportunistic Strategy is negatively related to the complexity
of the environment, while the Reactive Strategy is used more frequently in
a non-munificent environment.