The generalizability of findings might be limited since the participants were recruited with some inclusion criteria such as in a stable condition, Additionally, even though the ICC of the instruments in this study revealed good reliability, these had low internal consistency especially the PKRMQ.
Regarding participants' cognition and cooperation in recording, during telephone follow up, when their gold and action plan from the previous week was evaluated, most participants stated that they would remain on implementing same goals set or the participants' confidence level from the previous week. This needs to be considered in future studies since PWS' thinking may have limitations of cognition, such as dysfunctions in attention, learning and memory. Secondly, the mean pre-test medication adherence behavior in the experimental group and the control group was quite high ( 30.08 and 31.88, respectively ) out from 40. There were some reasons related to this result. Firstly, the measurement used was self-report questionnaire, which has been criticized to measurement of medication adherence behaviors was not tested in the long term condition, and further research using a longitudinal study will assist in knowing the sustainability and long term consequences of the medication adherence behavior.