Score Word Responses
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// Scores all 'recalled' words and returns an array of 0 and 1 (recalled).
// Only words with letters a-z and A-Z will be scored (e.g., not i-umlaut).
// Criterion is the percentage that may be wrong according to the Levenshtein
// distance relative to the correct word's length. Default: 20% or one letter
// wrong in five-letter word. For short words (e.g., 5 letters), this is a good
// setting. For much longer words/sentences, a higher criterion may be used.
// Usage:
// var w = ['one','two','three'],
// s = "two, ; one , five";
// scoreWordsRecalled(w,s); // Call with default criterion
// Returns [1,1,0]
function scoreWordsRecalled(words,recalled,criterion)
{
criterion = criterion || 0.20; // 20% difference is still OK, e.g., hony instead of honey
var i, j, r = recalled.split(/[^A-Za-z]+/), result = [], score;
for (i = 0; i < words.length; i++)
{
score = 0;
for (j = 0; j < r.length; j++)
{
if ( distance(words[i],r[j]) <= criterion*words[i].length) {
score = 1;
break;
}
}
result.push(score);
}
return result;
}
var correct_words = ['one','two','three'],
subject_response = "Two, ; one , five"; // N.B. This is a string. E.g., from larginput()
var result = scoreWordsRecalled(correct_words,subject_response); // Call with default criterion
var i, sum = 0;
for (i = 0; i < result.length; i++) {
sum = sum + result[i];
}
console.log("Result:",result,sum);