Score Word Responses Demo Experiment Run Experiment

Score Word Responses

Jaap Murre

Function to help you score free recall answers as obtained with the largeinput() function


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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 w = ['one','two','three'],
        s = "Two,  ; one  ,  five";

    var result = scoreWordsRecalled(w,s); // Call with default criterion
    
    var i, sum = 0;
    for (i = 0; i < result.length; i++) {
        sum = sum + result[i];
    }
    
    console.log("Result:",result,sum);
*/

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