Contrary to the popular adage, power isn't a passive force that reveals pre-existing character. Neuroscience and psychology show it actively alters everyone's brain chemistry and perception, changing how they process risk, empathy, and decisions.
Teams often withhold negative feedback to avoid hurting a well-liked leader's feelings. This 'protection' born from affection can be as damaging as silence from fear, as it equally distorts the leader's perception of reality and prevents necessary corrections.
A leader's self-perception is largely irrelevant. What truly matters is their tangible impact on others. Instead of asking if a leader *is* caring, effective leadership measurement asks if their team *feels* cared for, shifting the focus from intention to outcome.
Neuroscience reveals that gaining power strengthens the neural pathways between the brain's emotional centers and its decision-making regions. This physical change makes leaders more susceptible to being influenced by their internal feelings, desires, and biases.
Traditional 360 reviews asking about a leader's *behavior* are distorted, as direct reports give inflated ratings. A more accurate method is to ask about the leader's *impact* (e.g., "Do you feel motivated?"). This flips the results, revealing a more critical and realistic view.
Leadership assessment typically focuses on present skills. A more robust approach predicts how a candidate will be changed by the power of the new role. This means assessing their future 'suitability' and likely behavioral evolution, not just current 'capability'.
A CEO's best defense against the negative effects of power is a team that challenges them. Boards should actively oversee the selection of the executive team to prevent the CEO from defaulting to comfortable, loyalty-based hires who won't provide critical feedback.