The phrase "with conscientiousness" is correct and commonly used in written English.
You can use it when you are describing someone or something that is diligent, meticulous, or scrupulous. For example: "She approached her work with conscientiousness, making sure that everything was done to the highest standard."
Regarding health, life satisfaction and to lesser extent job satisfaction, much of the effect of Grit in explaining these outcomes is shared with Conscientiousness.
Social Player-versus-Environment activities were primarily positively correlated with Extraversion, Working activities were positively correlated with Conscientiousness, Helping and Immersion activities were positively correlated with Openness to Experience, and Core Content activities were positively correlated with Emotionality.
Some outcomes are related to one of the Grit subscales but not to Conscientiousness (educational attainment and trust), some are associated with Conscientiousness but not with Grit (labour force participation, wages) and for some we observe similar effects (job satisfaction, health and life satisfaction).
As for self-efficacy, relationships with negative Neuroticism and positive Extraversion and mainly with Conscientiousness seem to be empirically well-founded (Hartman and Betz 2007; Page et al. 2008; Rogers and Creed 2010), while positive correlations are also found, albeit low, with Agreeableness (Jin et al. 2009; Ourique and Teixeira 2012).
Consider the interplay with conscientiousness, however.
GMF was responsible for conception, design and execution of the study component concerned with conscientiousness index and peer ratings.
Here there is a parallel with moral conscientiousness, where a morally conscientious person is someone who tries her best to do what is right.
Parents with higher conscientiousness scores (NEO-FFI) and those with more impulsive children were more likely to perceive that analgesia was appropriate to use for child pain (Appropriate Use Attitude factor; p < 0.001).
A recent study with older adults reported that high neuroticism and extraversion as well as low openness predicted poor cognitive function over a seven-year period and that older adults with high conscientiousness showed a slow rate of cognitive decline while those with high neuroticism had a steep rate of cognitive decline [ 24].
Every person connected with the court -- clerks, bailiff, judge, security, attorneys -- acted with courtesy, conscientiousness, humor and humanity.
Desire for predictability was associated with both conscientiousness (r =.29) and neuroticism (r =.29) and was less strongly associated with extraversion (r =.06) than uncertainty paralysis (r = −.23).
