Table 2.

Social validity questions and results: Staff

Social validity questions	Average rating
1. To what extent do you feel this intervention seemed effective in increasing communication (teachers or peers) during mealtimes?	4.5
2. To what extent do you feel this intervention seemed effective in increasing engagement during mealtimes?	4.75
3. To what extent do you feel this intervention seemed effective in increasing consumer’s repertoire of conversational topics during mealtimes?	4.75
4. To what extent do you feel this intervention seemed effective in decreasing consumer engagement in challenging behavior?	3.5
5. To what extent do you feel that this intervention seemed effective in increasing confidence in teachers to support consumers during mealtimes?	3.25
6. To what extent do you feel that this intervention seemed effective in increasing interactions among consumers and staff outside mealtimes?	3.25
7. To what extent do you feel that this intervention seemed effective in increasing friendships among consumers?	2.75
8. To what extent do you feel that this intervention seemed effective in increasing community membership (feeling of group belonging) among consumers?	2.75

Note. The scale was 1 = very ineffective to 5 = very effective.