How do you recognise the different factors associated with Jhana and the level of Jhana you are in? (Not necessarily when you are in Jhana.)
More particularly how do recognise the factor of applied thought as such, factor of sustained thought as such, factor of rapture as such, factor of happiness as such and factor of one-pointedness of mind as such. How does the experience and correlate with the named factor such that it can be properly ascertained that this is infact this factor, and that factor has arisen and not something else or miss evaluation?