The phrase "adopted this mentality" is correct and usable in written English.
You can use it when discussing a mindset or approach that someone has embraced or accepted.
Example: "After years of working in the industry, she adopted this mentality that success comes from collaboration rather than competition."
Alternatives: "embraced this mindset" or "accepted this way of thinking."
The budget chains have adopted this mentality for their business model, with no tie-ins, leaving you free to quit any time simply by cancelling your direct debit.
Brands like Zara, H&M and Nike have adopted this mentality — shedding their old-school skin and stimulating sales, providing customers with expediency, convenience and high satisfaction.
When you adopt this mentality, a competitive startup, startup organization, or startup ecosystem does not have to lose in order for you to win...the most lucrative opportunity is to make the pie bigger for all.
Nearly every presentation touched on the importance of promoting a culture of risk preparedness and what companies can do to encourage leadership to adopt this mentality if it isn't already a best practice.
If U.S. physicians knowingly or unknowingly adopt this mentality their ethical obligations towards "war on terror" detainees may become compromised.
To the blinking astonishment of a lot of people in the music field, the Met administration has thrown off its deep-seated caution and adopted the mentality of a scrappy newcomer.
From day one, I adopted the mentality that nobody was going to do things for me, so I essentially became our manager as well.
In short order, and taking a card from Putin's playbook, the political establishment has rapidly adopted the mentality of a petro state: divide and conquer by means of resources.
"The only option before it was to stay completely silent or adopt this ex-gay mentality".
"What's important is to lose the mentality of 'agency of record' and adopt the mentality of 'catalyst of record' " — in other words, serve marketers as a force for change rather than as a supplier of the status quo.
