The phrase "at initial testing" is correct and usable in written English.
It can be used when referring to the first phase of testing or evaluation of a product, process, or system.
Example: "At initial testing, we found several issues that needed to be addressed before the final release."
Alternatives: "during preliminary testing" or "at the first evaluation stage."
In the 30 men with both good task and baseline data from initial testing, those with high heart rate reactivity (task minus baseline) showed higher systolic, diastolic, and heart rate levels at follow-up than low heart rate reactors, even though their baseline blood pressures had not differed at initial testing.
With the direct NRA, 217 (95%) of the 229 results were interpretable - 86% at initial testing.
The final sample included 62 younger children (31 girls, 31 boys; mean age at initial testing = 7.48 yr, SD = 0.27) and 43 older children (17 girls, 26 boys; mean age at initial testing = 9.49 yr, SD = 0.37).
With the direct MODS assay, 217 (95%) of the 229 results were interpretable - 91% at initial testing.
Interpretable results were seen in over 90% of the samples with either assays, most of them at initial testing.
For the few samples, without interpretable results at initial testing, the main reason was contamination for direct NRA and lack of growth for MODS.
Measures of subjective experiences and expectancies accounted for a sizable portion of the variance in hypnotic responding, both at initial test and at retest.
In the present study, a modified split Hopkinson pressure bar (SHPB) is employed to investigate the dynamic response of ice under uniaxial compression in the range of strain rates from 60 to 1400 s−1 and at initial test temperatures of −10 and −30 °C.
Although the recycler is used for single-orientation operation at this initial testing site, it is designed to operate at ±20° orientations, allowing the MEG system to be tilted for supine and reclining positions.
At the initial testing stage, there were no children whose anemia could be attributed to zidovudine.
At the initial testing session, the experimenter demonstrated how to complete all self-report measures and computerized tasks.
