The phrase "a bit more rigorous" is correct and usable in written English.
You can use it when discussing the need for increased thoroughness or strictness in a particular context, such as academic work or research.
Example: "To improve the quality of our findings, we need to adopt a bit more rigorous methodology in our experiments."
Alternatives: "somewhat more stringent" or "a little more thorough."
We can be a bit more rigorous about this and quantify each state's degree of elasticity.
For his family, a trip to Philadelphia is a bit more rigorous than, say, taking a cab to the train station.
My mother has a pet peeve about other diners at our table having their plates cleared before all have concluded with their entrees, whether at our country club (where presumably the training should be a bit more rigorous than Applebee's) or elsewhere.
The exercise for conference participants of preparing their papers for publication in OL may have appeared a bit more rigorous than that usually necessary simply for conference proceedings.
I admittedly put it through something a bit more rigorous than standardized testing when incorporating it into my daily usage — recording a podcast on Skype, listening to music while working/browsing the web (it's part of my job, I swear) — and got a few hours less than that.
But we can be a little bit more general and a little bit more rigorous about this.
"I think what Miller was trying to do was say, you need something that's maybe a little bit more rigorous," Pentagon spokesman Lawrence DiRita said Friday.
Now to make that lower-of-the-two-prices comment a little bit more rigorous, let's figure out what the demand actually is for these firms.
This mindset reflects mineralogy's origins in mining and chemistry, colored perhaps by a subliminal belief that the fields of physics and chemistry are more rigorous and thus a bit more "scientific" than the creative storytelling of the geologists.
The older generation of creationists "would come up with an explanation or a model and say, 'This solves it!' I'm a bit more cautious and at the same time more rigorous.
But sometimes you want a long, thoughtful analysis, and the essays in this book deliver: they are simultaneously rigorous and, thankfully, just as accessible as (and maybe a bit more cogent than) your average Amazon review.
