'psychological strength' is a perfectly correct and usable phrase in written English.
For example, you could use it in a sentence like this: "The wilderness trek tested her physical and psychological strength to its limits."
"Then comes the test for psychological strength -- commitment is not enough".
He approved of gamesmanship because it was a test of psychological strength.
But in the World Cup, each victory has brought his team greater psychological strength, Sasaki said.
Men and women trained for combat often deny having a problem; their psychological strength becomes their weakness.
It is hard for loyal Mets fans to shout down the visitors right now because they have very little psychological strength left.
Lahti was giving a talk on sisu, a Finnish word for the psychological strength that allows a person to overcome extraordinary challenges.
Additionally, several psychological strengths (like grit and optimism) will be explored as possible ways to "supercharge" gratitude.
Nor would they know that it can identify psychological strengths and weaknesses in patients to help them cope with physical illness and treatment.
Indeed, growing the psychological strengths of a student affected by trauma can be a core part of healing their psychological struggles.
"These findings suggest that an emphasis on bolstering psychological strengths rather than simply mitigating psychological deficits may improve cardiovascular health," Kubzansky said.
This paper assessed the associations between sports participation and the development of psychological strengths and difficulties during childhood.
