Some are restricted for use by speech and language professionals (therapists or SALTs in the UK, speech-language pathologists, SLPs, in the US and Australia). A commonly used test battery for diagnosis of SLI is the Clinical Evaluation of Language Fundamentals (CELF).
Noun. (plural push factors). 1  A factor that leaves one with no choice but to leave one's current home (especially parental home), country, region, organization, or religion. 2  Link/Cite.
Another term that is useful in this discussion is power factor (PF). The power factor is defined as the ratio of W to VA: Power factor = PF = W/VA (5) Power factor is always a number between zero and one because the watts drawn by a device are always less than or equal to the volt-amperes.