“…These studies included the comparisons between the personnel views and the single-stimulus preference assessment (Green et al, 1988), the caregivers" predictions and the paired-stimulus preference assessment , the personnel predictions and the paired-stimulus preference assessment ( Newton et al, 1993), the parents" and teachers" views and the paired-stimulus direct preference assessment (Didden and Moor, 2004), the teacher and familiar personnel views and the single-stimulus direct preference assessment (Spevack, 2006), the caregivers" views and the direct observation data (LaRosa, 2007), the teacher reports and the paired-stimulus direct preference assessment (Cote et al, 2007), the multiple-stimulus without replacement and the teachers" preference assessment (Resetar and Noell, 2008), and the caregivers" views and the multiplestimulus without replacement (Waldvogel and Dixon, 2008). As it is evident from the mentioned studies, there was no study that compared the indirect preference assessment to the directly applied three assessment methods.…”