I got this working by adding the following json to the article in my articles.json file. The sample at https://github.com/adaptlearning/adapt-contrib-assessment is missing the "_isEnabled":true
This causes a pop up at the end saying "You have finished the assessment" etc.
"_assessment": {
"_isEnabled":true,
"_isPercentageBased" : true,
"_scoreToPass" : 60,
"_completionMessage" : {
"title" : "You have finished the assessment",
"message": "You have scored [SCORE] out of [MAXSCORE]. [FEEDBACK]"
},
"_bands": [
{
"_score": 0,
"feedback": "You must try harder"
},
{
"_score": 25,
"feedback": "I think you can do better than this"
},
{
"_score": 50,
"feedback": "Good effort, you're getting there..."
},
{
"_score": 75,
"feedback": "Excellent!"
}
]
}