'less categorical' is correct and usable in written English.
It is an adjective that means “characterized by fewer specifications or restrictions.” For example, you can use it to describe an opinion as being "less categorical" than before, meaning that the opinion is now less firmly defined or has more room for interpretation.
Interaction effects were found between the factors step and block, b = 0.033, p =.001, indicating that participants' categorizations became, overall, less categorical as the experiment progressed; and between the factors block and precursor, b = -0.040, p =.010, reflecting the fact that the effect of precursor became smaller toward the end of the experiment, although it was never absent.
Others are less categorical.
But others are less categorical.
But at another point, he was slightly less categorical.
But Mr. Raviv's lawyer, Inbal Rubinstein, was less categorical.
In the 1950's, however, attitudes toward doping were often less categorical.
Garavito hypothesizes that adolescents affected by cumulative concussions may rely less on categorical thinking than non-concussed adolescents.
In response, Mr. Gonzales offered a denial that was less than categorical, saying: "I am not aware of any credible allegation of White House involvement in this matter.
The reply given in an unsworn statement by Bobby Moore was less than categorical: "There were quite a few members of the English football team in the foyer of the hotel and when Mr Charlton and I entered the jewellers' shop it may have been possible that other members of the team were round the door of the shop.
However, when Le Monde, a French newspaper, reported on May 9th that the two leaders had in fact advanced rather far, and were discussing Israel's withdrawal from 80-90% of the territory, the denial from Mr Barak's office seemed less than categorical.
When data did not follow a Gaussian function, non-parametric tests were used (Mann-Whitney U-test for unpaired data, Wilcoxon signed-rank test for paired data, and Fisher's exact test (used for an expected cell count of 5 or less) for categorical data).
