The phrase "an ad hoc study" is correct and usable in written English.
It can be used to describe a study that is conducted for a specific purpose or situation, often without a formal structure or long-term plan.
Example: "The researchers conducted an ad hoc study to assess the immediate impact of the new policy on employee productivity."
Alternatives: "a temporary study" or "a specific study".
"If you're offered the opportunity to serve on an ad hoc study section, do it".
Here, we use a framework put forth by an ad hoc study group of industry and government scientists and academics to critique the risk characterizations contained in two risks assessments of gasoline vapor.
Thus, in the present study, we used the latter approach and assessed bullying with the Italian version of the Short Negative Acts Questionnaire (S-NAQ) [ 29], which has been validated in Italy with an ad hoc study [ 30].
An ad hoc study of the diagnostic accuracy of second cancers in the Swedish Cancer Registry indicated that 98% were correctly classified 10, and the German cancer registries strictly followed the multiple primary coding rules of the International Agency for Research on Cancer IARCCancer IARC
The RIF affords numerous time and efficiency savings compared with an ad hoc, study-by-study approach; however, the same care and consideration should be put into designing a RIF query as would be put into any other approach.
Full evaluation of this issue will require a further ad hoc study.
Four studies were carried out on a nationally representative sample and the rest adopted ad hoc study designs.
The app (now available on the iPhone and launching this week on the iPad) allows students and teachers to post questions and answers regardless of location, allowing them to create spontaneous, ad hoc study groups wherever they are — for specific classes or across colleges.
Operation of ad hoc study clinic visits by group may have reduced the variability on the diagnosis by different physicians, the drop-out rate, and the time to complete the entire trial, but variations inherent in menstruation are unavoidable, which require greater manpower to closely follow up the women in order to meet the clinic schedules.
Nevertheless, the causal relationship cannot be explored in the present study, and an ad hoc interventional study is needed.
Actually, there is a lack of ad hoc studies in patients with hepatosplenic sarcoidosis, and most evidence derives from description of single case reports or from findings of small case series [ 10].
