Final answer:
A homogeneous set of experiences and talents is not an attribute of an effective board of directors; diversity is generally preferred to foster a comprehensive understanding and better decision-making.
Step-by-step explanation:
The attribute that was NOT identified in the textbook as an attribute of an effective board of directors is c) Homogeneous set of experiences and talents. An effective board of directors typically benefits from a diverse set of experiences and talents, which allows for a more comprehensive understanding of various issues and better decision-making. Other attributes such as decisiveness, the ability and willingness to stand up to the CEO and top managers, a customer-focused point of view, and strong communication with the CEO are considered positive traits for a board.