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Re: sample size of survey?
Message modified by board administrator 11/28/2009, 5:32 pm
I'm assuming you are referring to the validation study comparing the FBA Profiler with the BASC-2. For that study 59 school districts across 28 states provided a total of 658 records comparing FBA Profiler and BASC-2 internalizing and externalizing t-scores. This data determined a correlation of approximately .90 between the two instruments. On the data entry form respondents were also asked to provide their professional opinion regarding the utility of the information provide by the two instruments for each particular subject. 315 respondents (48%) expressed a preference for the information provided by the FBA Profiler, 329 (50%) expressed no preference between the two instruments, and 14 (2%) expressed a preference for the information provided by the BASC-2.