Effects of different assessors on multiple stimulus without replacement preference assessments

Preference assessments have been proven to be an effective assessment that is often used to determine preferences for individuals with developmental disabilities. The multiple stimulus without replacement preference assessment was used with typically developing children. The current study compared assessors of the preference assessments: familiar and non-familiar. There were five participants exposed to a total of ten sessions. The researcher wanted to see if there was a consistency among the rank order of the items chosen across sessions with the familiar person administering the preference assessment. The researcher also wanted to see if the items chosen as reinforcers were different when the familiar person was the assessor compared to the non-familiar person. The results of the current did not support the hypothesis due to the variability between the rank orders of the items chosen and the assessors. There are several limitations that may have contributed to the findings that were discussed such as not using a reinforcer assessment to confirm the validity of the reinforcing value of the selected item.