Incomplete question. Here's a general concept.
Answer:
Workplace culture
Step-by-step explanation:
Workplace culture virtually include everything from the behavioural characteristics each employee at their working environment, such as employees attitude towards work as well as management dealings with employees.
The most likely reason for a sudden change of my attitude was because I never really appreciated ethical standards, and when the opportunity came; I followed the crowd in cutting back on my work hours, getting absent without a valid reason and procrastinating daily, weekly or monthly tasks. Thus, the workplace culture had begun having a firm grip on me.