5 Classroom observation : Recailing and analyzing the data
Ad-hoc i,e, devised for a specific purpose whatever that purpose might be Unlike the fixed category systems we have been discussing, in this approach system of analysis. We have already noted that the fixed systems we have been examining are not necessarily inflexible, and we have indeed discussed many modihcations of them for various purposes. See, for example, the interesting wat in which Bowers has adapted his approach to suti the ‘ad-hor’ needs of a partictilar group of trainees in Bowers, 1987:158-179 Obviously, however, such flexibility must have limits, and the observer has to decide whether she prefers the eonven ience and perhaps reliability of working within an established system, or the freedorn to observe the phenomena through the focus of an entirely ad-hoe system.