"particularly valid" is a correct and usable phrase in written English.
You can use it to emphasize that something is especially valid or true. For example, "His argument was particularly valid given the current political climate."
The arguments of increased debt aren't particularly valid.
He added, however, that it did not impress him "as being a particularly valid number".
These concerns are particularly valid for prostate cancer and for early breast cancer.
This Marxian model, which was claimed to be particularly valid for capitalist societies, has met with much criticism.
With the passage in New York of the marriage equality bill, sensuality seems a particularly valid form.
And perhaps it's a particularly valid point for a country that has suffered everything twice – at least two ideologies and as many foreign occupations.
The ZPG was developed as previous prosocial tasks from behavioral economics or social psychology are either not particularly ecologically valid or do not allow for the repeated assessment of prosocial behavior which is required in intervention studies with multiple measurement time points.
This is particularly more valid for desert ecosystems, where vegetation is scarce and larger areas are to be sampled for any data to be robust and useful.
Pier et al. (2014) identified transformational speech patterns as particularly important to valid proofs.
This effort reveals that the counterflow ignition experiment requires special attention to ignition location in order to ensure that the assumption of quasi-one-dimensionality is valid, particularly at elevated pressures.
The medical treatment of patients with chronic primary headache syndromes (such as chronic migraine, chronic cluster headache, chronic tension-type headache or hemicrania continua) is particularly challenging as valid studies are few and in many cases even higher doses of preventative medication is ineffective and adverse side effects frequently complicate the course of medical treatment.
