The phrase "a first scale is" is correct and usable in written English.
It can be used when introducing or defining an initial level or measurement in a series or context.
Example: "In our study of sound frequencies, a first scale is essential for establishing the baseline for our experiments."
Alternatives: "an initial scale is" or "a primary scale is".
A third scale is then reckoned (total scale of perceived security) by cumulating the scores of maternal and paternal scales.
A fourth scale is the Checklist Pain Behaviour (CPB), which has been validated for postoperative pain and been reduced without any loss of information to a ten-item version [ 37, 38].
If relevance is rated three or above, a second scale is used assessing the extent to which the article contains news or something that clinicians are unlikely to know.
This situation was considered undesirable for several reasons, and, since it is possible to determine the relative masses of the atoms of individual isotopic species, a second scale was soon established with 16 as the value of the principal isotope of oxygen rather than the value of the natural mixture.
For this reason, a third scale was included to assess how individuals see themselves on a social ladder which uses as reference groups people who occupy the highest and the lowest positions in their working place.
The first scale was a 61-item self-administered survey, comprising a total of eight scales, each addressing a different component of a person's life, including cognitive effects, social effects, depression, fear, anger, physical discomfort, and physical limitations.
The first of these scales asks respondents to assess how important the task is to their job and the second scale is a self-assessment of respondents' current performance level of the task.
The fifth scale is a self-rated instrument which patients use to rate their own recovery and their own ongoing need for therapeutic security and the validation of this instrument is currently underway.
The second scale was a Cross-Gender Scale (CGS), incorporating six items loading significantly on the stable Factor 3 (invariant across several variations of the factor analysis) and assessing children's gender nonconforming behavior.
Similarly, a retrospective fourth and (when available) fifth scale were completed by someone older than the volunteer who knew him or her as a child.
