The Intellectual Disability Quality of Life
(IDQOL-16; Hoekman et al. 2001) was used to
measure the client’s quality of life. The IDQOL-16
has three sub-scales: psychological functioning,
social functioning and satisfaction about housing.
Sum scores are indications of an individual’s perceived
quality of life. The ‘satisfaction with housing’
sub-scale was not included in the treatment results
because housing satisfaction is not a primary goal of
SFBT. The IDQOL-16 has been shown to have
good internal consistency (Cronbrach’s a of the
various sub-scales were between 0.73 and 0.80).Each question has five response categories ranging
from very unpleasant to very pleasant, indicated by a
pictogram (smiley).