Sloan has adopted the “punishment” form of reinforcement towards his employees.
Step-by-step explanation:
Punishment at the workplace means when new adopted changes or behavior lead to negative consequences at the workplace.
Sloan’s method of awarding only when the employees perform well is a case of the same. His action of deducting the employee's salary by 20 percent too would not positively encourage them to perform well, but lead to dissatisfaction and contempt towards him.